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  • Notes on gauging noninvertible symmetries. Part I. Multiplicity-free cases
    Perez-Lona, Alonso; Robbins, D.; Sharpe, E.; Vandermeulen, T.; Yu, X. (2024-02-21)
    In this paper we discuss gauging noninvertible zero-form symmetries in two dimensions. We specialize to certain gaugeable cases, specifically, fusion categories of the form for a suitable Hopf algebra (which includes the special case Rep(G) for G a finite group). We also specialize to the case that the fusion category is multiplicity-free. We discuss how to construct a modular-invariant partition function from a choice of Frobenius algebra structure on . We discuss how ordinary G orbifolds for finite groups G are a special case of the construction, corresponding to the fusion category Vec(G) = Rep(ℂ[G]*). For the cases Rep(S3), Rep(D4), and Rep(Q8), we construct the crossing kernels for general intertwiner maps. We explicitly compute partition functions in the examples of Rep(S3), Rep(D4), Rep(Q8), and , and discuss applications in c = 1 CFTs. We also discuss decomposition in the special case that the entire noninvertible symmetry group acts trivially.
  • Dopamine and serotonin in human substantia nigra track social context and value signals during economic exchange
    Batten, Seth R.; Bang, Dan; Kopell, Brian H.; Davis, Arianna N.; Heflin, Matthew; Fu, Qixiu; Perl, Ofer; Ziafa, Kimia; Hashemi, Alice; Saez, Ignacio; Barbosa, Leonardo S.; Twomey, Thomas; Lohrenz, Terry; White, Jason P.; Dayan, Peter; Charney, Alexander W.; Figee, Martijn; Mayberg, Helen S.; Kishida, Kenneth T.; Gu, Xiaosi; Montague, P. Read (Nature Research, 2024-02-26)
    Dopamine and serotonin are hypothesized to guide social behaviours. In humans, however, we have not yet been able to study neuromodulator dynamics as social interaction unfolds. Here, we obtained subsecond estimates of dopamine and serotonin from human substantia nigra pars reticulata during the ultimatum game. Participants, who were patients with Parkinson’s disease undergoing awake brain surgery, had to accept or reject monetary offers of varying fairness from human and computer players. They rejected more offers in the human than the computer condition, an effect of social context associated with higher overall levels of dopamine but not serotonin. Regardless of the social context, relative changes in dopamine tracked trial-by-trial changes in offer value—akin to reward prediction errors—whereas serotonin tracked the current offer value. These results show that dopamine and serotonin fluctuations in one of the basal ganglia’s main output structures reflect distinct social context and value signals.
  • Quantum cohomology from mixed Higgs-Coulomb phases
    Gu, Wei; Melnikov, Ilarion V.; Sharpe, Eric (2024-02-01)
    We generalize Coulomb-branch-based gauged linear sigma model (GLSM)–computations of quantum cohomology rings of Fano spaces. Typically such computations have focused on GLSMs without superpotential, for which the low energy limit of the GLSM is a pure Coulomb branch, and quantum cohomology is determined by the critical locus of a twisted one-loop effective superpotential. We extend these results to cases for which the low energy limit of the GLSM includes both Coulomb and Higgs branches, where the latter is a Landau-Ginzburg orbifold. We describe the state spaces and products of corresponding operators in detail, comparing a geometric phase description, where the operator product ring is quantum cohomology, to the description in terms of Coulomb and Higgs branch states. As a concrete test of our methods, we compare to existing mathematics results for quantum cohomology rings of hypersurfaces in projective spaces.
  • Neutrino Flavor Model Building and the Origins of Flavor and CP Violation
    Almumin, Yahya; Chen, Mu-Chun; Cheng, Murong; Knapp-Pérez, Víctor; Li, Yulun; Mondol, Adreja; Ramos-Sánchez, Saúl; Ratz, Michael; Shukla, Shreya (MDPI, 2023-12-12)
    The neutrino sector offers one of the most sensitive probes of new physics beyond the Standard Model of Particle Physics (SM). The mechanism of neutrino mass generation is still unknown. The observed suppression of neutrino masses hints at a large scale, conceivably of the order of the scale of a rand unified theory (GUT), which is a unique feature of neutrinos that is not shared by the charged fermions. The origin of neutrino masses and mixing is part of the outstanding puzzle of fermion masses and mixings, which is not explained ab initio in the SM. Flavor model building for both quark and lepton sectors is important in order to gain a better understanding of the origin of the structure of mass hierarchy and flavor mixing, which constitute the dominant fraction of the SM parameters. Recent activities in neutrino flavor model building based on non-Abelian discrete flavor symmetries and modular flavor symmetries have been shown to be a promising direction to explore. The emerging models provide a framework that has a significantly reduced number of undetermined parameters in the flavor sector. In addition, such a framework affords a novel origin of CP violation from group theory due to the intimate connection between physical CP transformation and group theoretical properties of non-Abelian discrete groups. Model building based on non-Abelian discrete flavor symmetries and their modular variants enables the particle physics community to interpret the current and anticipated upcoming data from neutrino experiments. Non-Abelian discrete flavor symmetries and their modular variants can result from compactification of a higher-dimensional theory. Pursuit of flavor model building based on such frameworks thus also provides the connection to possible UV completions: in particular, to string theory. We emphasize the importance of constructing models in which the uncertainties of theoretical predictions are smaller than, or at most compatible with, the error bars of measurements in neutrino experiments. While there exist proof-of-principle versions of bottom-up models in which the theoretical uncertainties are under control, it is remarkable that the key ingredients of such constructions were discovered first in top-down model building. We outline how a successful unification of bottom-up and top-down ideas and techniques may guide us towards a new era of precision flavor model building in which future experimental results can give us crucial insights into the UV completion of the SM.
  • Room-Temperature Intrinsic and Extrinsic Damping in Polycrystalline Fe Thin Films
    Wu, Shuang; Smith, David A.; Nakarmi, Prabandha; Rai, Anish; Clavel, Michael; Hudait, Mantu K.; Zhao, Jing; Michel, F. Marc; Mewes, Claudia; Mewes, Tim; Emori, Satoru (2021-09-08)
    We examine room-temperature magnetic relaxation in polycrystalline Fe films. Out-of-plane ferromagnetic resonance (FMR) measurements reveal Gilbert damping parameters of $\approx$ 0.0024 for Fe films with thicknesses of 4-25 nm, regardless of their microstructural properties. The remarkable invariance with film microstructure strongly suggests that intrinsic Gilbert damping in polycrystalline metals at room temperature is a local property of nanoscale crystal grains, with limited impact from grain boundaries and film roughness. By contrast, the in-plane FMR linewidths of the Fe films exhibit distinct nonlinear frequency dependences, indicating the presence of strong extrinsic damping. To fit our in-plane FMR data, we have used a grain-to-grain two-magnon scattering model with two types of correlation functions aimed at describing the spatial distribution of inhomogeneities in the film. However, neither of the two correlation functions is able to reproduce the experimental data quantitatively with physically reasonable parameters. Our findings advance the fundamental understanding of intrinsic Gilbert damping in structurally disordered films, while demonstrating the need for a deeper examination of how microstructural disorder governs extrinsic damping.
  • Twisted Fibrations in M/F-theory
    Anderson, Lara B.; Gray, James; Oehlmann, Paul-Konstantin (2024-01-04)
    In this work we investigate 5-dimensional theories obtained from M-theory on genus one fibered threefolds which exhibit twisted algebras in their fibers. We provide a base-independent algebraic description of the threefolds and compute light 5D BPS states charged under finite sub-algebras of the twisted algebras. We further construct the Jacobian fibrations that are associated to 6-dimensional F-theory lifts, where the twisted algebra is absent. These 6/5-dimensional theories are compared via twisted circle reductions of F-theory to M-theory. In the 5-dimensional theories we discuss several geometric transitions that connect twisted with untwisted fibrations. We present detailed discussions of 𝔢(2)6,𝔰𝔬(3)8 and 𝔰𝔲(2)3 twisted fibers and provide several explicit example threefolds via toric constructions. Finally, limits are considered in which gravity is decoupled, including Little String Theories for which we match 2-group symmetries across twisted T-dual theories.
  • Constraints on directionality effect of nuclear recoils in a liquid argon time projection chamber
    (2024-01-10)
    The direct search for dark matter in the form of weakly interacting massive particles (WIMP) is performed by detecting nuclear recoils produced in a target material from the WIMP elastic scattering. The experimental identification of the direction of the WIMP-induced nuclear recoils is a crucial asset in this field, as it enables unmistakable modulation signatures for dark matter. The Recoil Directionality (ReD) experiment was designed to probe for such directional sensitivity in argon dual-phase time projection chambers (TPC), that are widely considered for current and future direct dark matter searches. The TPC of ReD was irradiated with neutrons at the INFN Laboratori Nazionali del Sud. Data were taken with nuclear recoils of known directions and kinetic energy of 72 keV, which is within the range of interest for WIMP-induced signals in argon. The direction-dependent liquid argon charge recombination model by Cataudella et al. was adopted and a likelihood statistical analysis was performed, which gave no indications of significant dependence of the detector response to the recoil direction. The aspect ratio R of the initial ionization cloud is R < 1.072 with 90% confidence level.
  • Study of B+→p¯nπ0
    Chu, K. -N.; Lin, Y. -R.; Wang, M. -Z.; Adachi, I.; Adamczyk, K.; Aihara, H.; Al Said, S.; Asner, D. M.; Atmacan, H.; Aulchenko, V.; Aushev, T.; Ayad, R.; Babu, V.; Banerjee, Sw; Behera, P.; Belous, K.; Bennett, J.; Bessner, M.; Bhardwaj, V.; Bhuyan, B.; Bilka, T.; Biswas, D.; Bodrov, D.; Bonvicini, G.; Borah, J.; Bozek, A.; Bračko, M.; Branchini, P.; Browder, T. E.; Budano, A.; Campajola, M.; Červenkov, D.; Chang, M. -C.; Chang, P.; Chen, A.; Cheon, B. G.; Chilikin, K.; Cho, H. E.; Cho, K.; Cho, S. -J.; Choi, S. -K.; Choi, Y.; Choudhury, S.; Cinabro, D.; De Nardo, G.; De Pietro, G.; Dhamija, R.; Di Capua, F.; Dingfelder, J.; Doležal, Z.; Dong, T. V.; Epifanov, D.; Ferber, T.; Ferlewicz, D.; Fulsom, B. G.; Gaur, V.; Garmash, A.; Giri, A.; Goldenzweig, P.; Golob, B.; Graziani, E.; Gu, T.; Gudkova, K.; Hadjivasiliou, C.; Halder, S.; Han, X.; Hayasaka, K.; Hayashii, H.; Hou, W. -S.; Hsu, C. -L.; Huang, K.; Iijima, T.; Inami, K.; Ipsita, N.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Jacobs, W. W.; Jang, E. -J.; Jin, Y.; Joo, K. K.; Kalita, D.; Kaliyar, A. B.; Kawasaki, T.; Kiesling, C.; Kim, C. H.; Kim, D. Y.; Kim, K. -H.; Kim, Y. -K.; Kodyš, P.; Konno, T.; Korobov, A.; Korpar, S.; Kovalenko, E.; Križan, P.; Krokovny, P.; Kuhr, T.; Kumar, R.; Kumara, K.; Kuzmin, A.; Kwon, Y. -J.; Lai, Y. -T.; Lam, T.; Lange, J. S.; Lee, S. C.; Li, C. H.; Li, J.; Li, L. K.; Li, S. X.; Li, Y.; Li, Y. B.; Li Gioi, L.; Libby, J.; Lieret, K.; Liventsev, D.; Luo, T.; Masuda, M.; Matsuda, T.; Matvienko, D.; Maurya, S. K.; Meier, F.; Merola, M.; Metzner, F.; Miyabayashi, K.; Mizuk, R.; Mohanty, G. B.; Nakamura, I.; Nakao, M.; Natkaniec, Z.; Natochii, A.; Nayak, L.; Nisar, N. K.; Nishida, S.; Onuki, Y.; Oskin, P.; Pakhlov, P.; Pakhlova, G.; Pardi, S.; Park, H.; Park, J.; Passeri, A.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Podobnik, T.; Prencipe, E.; Prim, M. T.; Rostomyan, A.; Rout, N.; Russo, G.; Sandilya, S.; Santelj, L.; Savinov, V.; Schnell, G.; Schwanda, C.; Seino, Y.; Senyo, K.; Sevior, M. E.; Shan, W.; Shapkin, M.; Sharma, C.; Shen, C. P.; Shiu, J. -G.; Shwartz, B.; Simon, F.; Sokolov, A.; Solovieva, E.; Starič, M.; Stottler, Z. S.; Strube, J. F.; Sumihama, M.; Sumisawa, K.; Sumiyoshi, T.; Takizawa, M.; Tamponi, U.; Tanida, K.; Tenchini, F.; Trabelsi, K.; Uchida, M.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Vahsen, S. E.; van Tonder, R.; Varner, G.; Varvell, K. E.; Vinokurova, A.; Vossen, A.; Watanuki, S.; Won, E.; Xu, X.; Yabsley, B. D.; Yan, W.; Yang, S. B.; Yelton, J.; Yin, J. H.; Yuan, C. Z.; Yuan, L.; Yusa, Y.; Zhang, Z. P.; Zhilich, V.; Zhukova, V. (American Physical Society, 2023-12-15)
    We search for the tree-diagram dominated process B+→p¯nπ0, using a data sample of 772×106B¯B pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. This is the first search with the Belle detector for a decay mode including an antineutron. No significant signal is observed and a 90% credible upper limit on the branching fraction is set at 6.3×10−6.
  • First Simultaneous Determination of Inclusive and Exclusive |Vub|
    Cao, L.; Bernlochner, F.; Tackmann, K.; Adachi, I.; Aihara, H.; Al Said, S.; Asner, D. M.; Atmacan, H.; Aushev, T.; Ayad, R.; Babu, V.; Bahinipati, S.; Banerjee, Sw; Behera, P.; Belous, K.; Bennett, J.; Bessner, M.; Bhuyan, B.; Bilka, T.; Biswas, D.; Bobrov, A.; Bodrov, D.; Borah, J.; Bozek, A.; Bračko, M.; Branchini, P.; Browder, T. E.; Budano, A.; Campajola, M.; Červenkov, D.; Chang, M. -C.; Cheon, B. G.; Chilikin, K.; Cho, H. E.; Cho, K.; Cho, S. -J.; Choi, S. -K.; Choi, Y.; Choudhury, S.; Cinabro, D.; Cunliffe, S.; Das, S.; de Marino, G.; De Nardo, G.; De Pietro, G.; Dhamija, R.; Di Capua, F.; Dingfelder, J.; Doležal, Z.; Dong, T. V.; Ferber, T.; Ferlewicz, D.; Frey, A.; Fulsom, B. G.; Gaur, V.; Garmash, A.; Giri, A.; Goldenzweig, P.; Graziani, E.; Gu, T.; Guan, Y.; Gudkova, K.; Hadjivasiliou, C.; Halder, S.; Hara, T.; Hartbrich, O.; Hayasaka, K.; Hayashii, H.; Hedges, M. T.; Herrmann, D.; Hou, W. -S.; Hsu, C. -L.; Iijima, T.; Inami, K.; Ipsita, N.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Jacobs, W. W.; Jang, E. -J.; Jia, S.; Jin, Y.; Joo, K. K.; Kalita, D.; Kang, K. H.; Kiesling, C.; Kim, C. H.; Kim, D. Y.; Kim, K. -H.; Kim, Y. -K.; Kinoshita, K.; Kodyš, P.; Konno, T.; Korobov, A.; Korpar, S.; Kovalenko, E.; Križan, P.; Krokovny, P.; Kuhr, T.; Kumar, R.; Kumara, K.; Kuzmin, A.; Kwon, Y. -J.; Lange, J. S.; Laurenza, M.; Lee, S. C.; Lewis, P.; Li, J.; Li, L. K.; Li, Y.; Libby, J.; Lin, Y. -R.; Liventsev, D.; Luo, T.; Ma, Y.; Martini, A.; Masuda, M.; Matsuda, T.; Matvienko, D.; Maurya, S. K.; Meier, F.; Merola, M.; Metzner, F.; Miyabayashi, K.; Mizuk, R.; Mohanty, G. B.; Mrvar, M.; Mussa, R.; Nakamura, I.; Nakao, M.; Natkaniec, Z.; Natochii, A.; Nayak, L.; Nayak, M.; Nisar, N. K.; Nishida, S.; Ogawa, K.; Ogawa, S.; Ono, H.; Oskin, P.; Pakhlov, P.; Pakhlova, G.; Pang, T.; Pardi, S.; Park, H.; Park, J.; Park, S. -H.; Passeri, A.; Patra, S.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Podobnik, T.; Prencipe, E.; Prim, M. T.; Rout, N.; Rozanska, M.; Russo, G.; Sandilya, S.; Sangal, A.; Santelj, L.; Savinov, V.; Schnell, G.; Schwanda, C.; Seino, Y.; Senyo, K.; Sevior, M. E.; Shan, W.; Shapkin, M.; Sharma, C.; Shen, C. P.; Shiu, J. -G.; Shwartz, B.; Sokolov, A.; Solovieva, E.; Starič, M.; Stottler, Z. S.; Sumihama, M.; Sutcliffe, W.; Takizawa, M.; Tamponi, U.; Tanida, K.; Tenchini, F.; Tiwary, R.; Trabelsi, K.; Uchida, M.; Uglov, T.; Unno, Y.; Uno, K.; Uno, S.; Ushiroda, Y.; Usov, Y.; Vahsen, S. E.; Varner, G.; Varvell, K. E.; Vossen, A.; Wang, D.; Wang, E.; Wang, M. -Z.; Watanuki, S.; Werbycka, O.; Won, E.; Xu, X.; Yabsley, B. D.; Yan, W.; Yang, S. B.; Yin, J. H.; Yook, Y.; Yusa, Y.; Zhang, Z. P.; Zhilich, V.; Zhukova, V. (American Physical Society (APS), 2023-11-24)
  • Tests of Light-Lepton Universality in Angular Asymmetries of B0 →d∗-ℓν Decays
    Adachi, I.; Adamczyk, K.; Aggarwal, L.; Aihara, H.; Akopov, N.; Aloisio, A.; Anh Ky, N.; Asner, D. M.; Atmacan, H.; Aushev, T.; Aushev, V.; Aversano, M.; Babu, V.; Bae, H.; Bahinipati, S.; Bambade, P.; Banerjee, S.; Barrett, M.; Baudot, J.; Bauer, M.; Baur, A.; Beaubien, A.; Becherer, F.; Becker, J.; Behera, P. K.; Bennett, J. V.; Bernlochner, F. U.; Bertacchi, V.; Bertemes, M.; Bertholet, E.; Bessner, M.; Bettarini, S.; Bhuyan, B.; Bianchi, F.; Bilka, T.; Biswas, D.; Bobrov, A.; Bodrov, D.; Bolz, A.; Bondar, A.; Borah, J.; Bozek, A.; Bračko, M.; Branchini, P.; Briere, R. A.; Browder, T. E.; Budano, A.; Bussino, S.; Campajola, M.; Cao, L.; Casarosa, G.; Cecchi, C.; Cerasoli, J.; Chang, M. C.; Chang, P.; Cheaib, R.; Cheema, P.; Chekelian, V.; Cheon, B. G.; Chilikin, K.; Chirapatpimol, K.; Cho, H. E.; Cho, K.; Choi, S. K.; Choudhury, S.; Cochran, J.; Corona, L.; Cremaldi, L. M.; Das, S.; Dattola, F.; De La Cruz-Burelo, E.; De La Motte, S. A.; De Nardo, G.; De Nuccio, M.; De Pietro, G.; De Sangro, R.; Destefanis, M.; Dey, S.; Dhamija, R.; Di Canto, A.; Di Capua, F.; Dingfelder, J.; DoleŽal, Z.; Domínguez Jiménez, I.; Dong, T. V.; Dorigo, M.; Dort, K.; Dossett, D.; Dreyer, S.; Dubey, S.; Dujany, G.; Ecker, P.; Eliachevitch, M.; Epifanov, D.; Feichtinger, P.; Ferber, T.; Ferlewicz, D.; Fillinger, T.; Finck, C.; Finocchiaro, G. (American Physical Society (APS), 2023-11-03)
    We present the first comprehensive tests of the universality of the light leptons in the angular distributions of semileptonic B0-meson decays to charged spin-1 charmed mesons. We measure five angular-asymmetry observables as functions of the decay recoil that are sensitive to lepton-universality-violating contributions. We use events where one neutral B is fully reconstructed in (4S)→BB¯ decays in data corresponding to 189 fb-1 integrated luminosity from electron-positron collisions collected with the Belle II detector. We find no significant deviation from the standard model expectations.
  • Observation of e plus e-ωχbJ(1P) and Search for Xbωγ(1S) at √s near 10.75 GeV
    Adachi, I.; Aggarwal, L.; Ahmed, H.; Aihara, H.; Akopov, N.; Aloisio, A.; Ky, N. Anh; Asner, D. M.; Aushev, T.; Aushev, V.; Bae, H.; Bambade, P.; Banerjee, Sw; Baudot, J.; Bauer, M.; Beaubien, A.; Becker, J.; Behera, P. K.; V. Bennett, J.; Bernieri, E.; Bernlochner, F. U.; Bertacchi, V.; Bertemes, M.; Bertholet, E.; Bessner, M.; Bettarini, S.; Bhuyan, B.; Bianchi, F.; Bilka, T.; Biswas, D.; Bodrov, D.; Bolz, A.; Borah, J.; Bozek, A.; Bracko, M.; Branchini, P.; Browder, T. E.; Budano, A.; Bussino, S.; Campajola, M.; Cao, L.; Casarosa, G.; Chang, M. -C.; Cheema, P.; Chekelian, V.; Chen, Y. Q.; Chilikin, K.; Chirapatpimol, K.; Cho, H. -E.; Cho, K.; Cho, S. -J.; Choi, S. -K.; Choudhury, S.; Cinabro, D.; Corona, L.; Cunliffe, S.; Das, S.; Dattola, F.; De La Cruz-Burelo, E.; De La Motte, S. A.; De Nardo, G.; De Nuccio, M.; De Pietro, G.; de Sangro, R.; Destefanis, M.; Dey, S.; De Yta-Hernandez, A.; Dhamija, R.; Di Canto, A.; Di Capua, F.; Dolezal, Z.; Jimenez, I. Dominguez; V. Dong, T.; Dorigo, M.; Dort, K.; Dreyer, S.; Dubey, S.; Dujany, G.; Eliachevitch, M.; Feichtinger, P.; Ferber, T.; Ferlewicz, D.; Fillinger, T.; Finocchiaro, G.; Fodor, A.; Forti, F.; Fulsom, B. G.; Ganiev, E.; Gaur, V.; Gaz, A.; Gellrich, A.; Ghevondyan, G.; Giordano, R.; Giri, A.; Glazov, A.; Gobbo, B.; Godang, R.; Goldenzweig, P.; Granderath, S.; Graziani, E.; Greenwald, D.; Gu, T.; Guan, Y.; Gudkova, K.; Guilliams, J.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hazra, S.; Hearty, C.; de la Cruz, I. Heredia; Villanueva, M. Hernandez; Hershenhorn, A.; Higuchi, T.; Hill, E. C.; Hirata, H.; Hohmann, M.; Hsu, C. -L.; Iijima, T.; Inami, K.; Inguglia, G.; Ipsita, N.; Ishikawa, A.; Ito, S.; Iwasaki, M.; Jackson, P.; Jacobs, W. W.; Jaffe, D. E.; Jang, E. -J.; Ji, Q. P.; Jia, S.; Jin, Y.; Joo, K. K.; Junkerkalefeld, H.; Kaliyar, A. B.; Kang, K. H.; Karl, R.; Karyan, G.; Ketter, C.; Kiesling, C.; Kim, C. -H.; Kim, D. Y.; Kim, K. -H.; Kim, Y. -K.; Kindo, H.; Kodys, P.; Koga, T.; Kohani, S.; Kojima, K.; Konno, T.; Korobov, A.; Korpar, S.; Kovalenko, E.; Kowalewski, R.; Kraetzschmar, T. M. G.; Krizan, P.; Krokovny, P.; Kumar, R.; Kumara, K.; Kunigo, T.; Kuzmin, A.; Kwon, Y. -J.; Lacaprara, S.; Lam, T.; Lanceri, L.; Lange, J. S.; Laurenza, M.; Lautenbach, K.; Leboucher, R.; Lewis, P. M.; Li, C.; Li, L. K.; Libby, J.; Lieret, K.; Liptak, Z.; Liu, Q. Y.; Liventsev, D.; Longo, S.; Lozar, A.; Lueck, T.; Lyu, C.; Maggiora, M.; Maiti, R.; Manfredi, R.; Manoni, E.; Marcello, S.; Marinas, C.; Martel, L.; Martini, A.; Martinov, T.; Massaccesi, L.; Masuda, M.; Matsuoka, K.; Maurya, S. K.; McKenna, J. A.; Merola, M.; Metzner, F.; Milesi, M.; Miller, C.; Miyabayashi, K.; Mizuk, R.; Molina-Gonzalez, N.; Moneta, S.; Moser, H. -G.; Mrvar, M.; Mussa, R.; Nakamura, I.; Nakao, M.; Nakazawa, Y.; Charan, A. Narimani; Naruki, M.; Natkaniec, Z.; Natochii, A.; Nayak, L.; Nayak, M.; Nazaryan, G.; Nisar, N. K.; Ogawa, S.; Ono, H.; Onuki, Y.; Oskin, P.; Paladino, A.; Panta, A.; Paoloni, E.; Pardi, S.; Park, H.; Park, S. -H.; Paschen, B.; Passeri, A.; Paul, S.; Pedlar, T. K.; Peruzzi, I.; Peschke, R.; Pestotnik, R.; Piccolo, M.; Piilonen, L. E.; Podesta-Lerma, P. L. M.; Podobnik, T.; Pokharel, S.; Polat, L.; Praz, C.; Prell, S.; Prencipe, E.; Prim, M. T.; Purwar, H.; Rad, N.; Raiz, S.; Morales, A. Ramirez; Reif, M.; Reiter, S.; Remnev, M.; Ripp-Baudot, I.; Rizzo, G.; Robertson, S. H.; Roney, J. M.; Rostomyan, A.; Rout, N.; Russo, G.; Sanders, D. A.; Sandilya, S.; Sangal, A.; Santelj, L.; Sato, Y.; Savinov, V.; Scavino, B.; Schueler, J.; Schwanda, C.; Seino, Y.; Selce, A.; Senyo, K.; Serrano, J.; Sevior, M. E.; Sfienti, C.; Shen, C. P.; Shi, X. D.; Shillington, T.; Sibidanov, A.; Singh, J. B.; Skorupa, J.; Sobie, R. J.; Soffer, A.; Solovieva, E.; Spataro, S.; Staric, M.; Stefkova, S.; Stottler, Z. S.; Stroili, R.; Sue, Y.; Sumihama, M.; Sumisawa, K.; Sutcliffe, W.; Suzuki, S. Y.; Svidras, H.; Takizawa, M.; Tanida, K.; Tanigawa, H.; Tenchini, F.; Thaller, A.; Tiwary, R.; Tonelli, D.; Torassa, E.; Toutounji, N.; Trabelsi, K.; Uchida, M.; Ueda, I.; Uematsu, Y.; Uglov, T.; Unger, K.; Unno, Y.; Uno, K.; Uno, S.; Ushiroda, Y.; Vahsen, S. E.; van Tonder, R.; Varner, G. S.; Vinokurova, A.; Vitale, L.; Vobbilisetti, V.; Wakeling, H. M.; Wang, E.; Wang, M. -Z.; Warburton, A.; Watanuki, S.; Welsch, M.; Wessel, C.; Won, E.; Xu, X. P.; Yabsley, B. D.; Yamada, S.; Yan, W.; Yang, S. B.; Ye, H.; Yelton, J.; Yin, J. H.; Yook, Y. M.; Yoshihara, K.; Yuan, C. Z.; Zani, L.; Zhang, Y.; Zhou, X. Y.; Zhukova, V. I.; Zlebcik, R. (AMER PHYSICAL SOC, 2023-03-03)
    We study the processes e+e-→ωχbJ(1P) (J=0, 1, or 2) using samples at center-of-mass energies s=10.701, 10.745, and 10.805 GeV, corresponding to 1.6, 9.8, and 4.7 fb-1 of integrated luminosity, respectively. These data were collected with the Belle II detector during special operations of the SuperKEKB collider above the ϒ(4S) resonance. We report the first observation of ωχbJ(1P) signals at s=10.745 GeV. By combining Belle II data with Belle results at s=10.867 GeV, we find energy dependencies of the Born cross sections for e+e-→ωχb1,b2(1P) to be consistent with the shape of the ϒ(10753) state. These data indicate that the internal structures of the ϒ(10753) and ϒ(10860) states may differ. Including data at s=10.653 GeV, we also search for the bottomonium equivalent of the X(3872) state decaying into ωϒ(1S). No significant signal is observed for masses between 10.45 and 10.65 GeV/c2.
  • Determination of |Vcb| using B¯0→D*+ℓ−ν¯ℓ decays with Belle II
    Adachi, I.; Aggarwal, L.; Ahmed, H.; Aihara, H.; Akopov, N.; Aloisio, A.; Anh Ky, N.; Asner, D. M.; Atmacan, H.; Aushev, T.; Aushev, V.; Aversano, M.; Babu, V.; Bae, H.; Bahinipati, S.; Bambade, P.; Banerjee, Sw; Bansal, S.; Barrett, M.; Baudot, J.; Bauer, M.; Baur, A.; Beaubien, A.; Becherer, F.; Becker, J.; Behera, P. K.; Bennett, J. V.; Bernlochner, F. U.; Bertacchi, V.; Bertemes, M.; Bertholet, E.; Bessner, M.; Bettarini, S.; Bhuyan, B.; Bianchi, F.; Bilka, T.; Biswas, D.; Bobrov, A.; Bodrov, D.; Bolz, A.; Bondar, A.; Borah, J.; Bozek, A.; Bračko, M.; Branchini, P.; Briere, R. A.; Browder, T. E.; Budano, A.; Bussino, S.; Campajola, M.; Cao, L.; Casarosa, G.; Cecchi, C.; Cerasoli, J.; Chang, M. -C.; Chang, P.; Cheaib, R.; Cheema, P.; Chekelian, V.; Chen, C.; Cheon, B. G.; Chilikin, K.; Chirapatpimol, K.; Cho, H. -E.; Cho, K.; Cho, S. -J.; Choi, S. -K.; Choudhury, S.; Cochran, J.; Corona, L.; Cremaldi, L. M.; Das, S.; Dattola, F.; De La Cruz-Burelo, E.; De La Motte, S. A.; De Nardo, G.; De Nuccio, M.; De Pietro, G.; de Sangro, R.; Destefanis, M.; Dey, S.; De Yta-Hernandez, A.; Dhamija, R.; Di Canto, A.; Di Capua, F.; Dingfelder, J.; Doležal, Z.; Domínguez Jiménez, I.; Dong, T. V.; Dorigo, M.; Dort, K.; Dossett, D.; Dreyer, S.; Dubey, S.; Dujany, G.; Ecker, P.; Eliachevitch, M.; Feichtinger, P.; Ferber, T.; Ferlewicz, D.; Fillinger, T.; Finck, C.; Finocchiaro, G.; Fodor, A.; Forti, F.; Frey, A.; Fulsom, B. G.; Gabrielli, A.; Ganiev, E.; Garcia-Hernandez, M.; Garg, R.; Garmash, A.; Gaudino, G.; Gaur, V.; Gaz, A.; Gellrich, A.; Ghevondyan, G.; Ghosh, D.; Ghumaryan, H.; Giakoustidis, G.; Giordano, R.; Giri, A.; Glazov, A.; Gobbo, B.; Godang, R.; Gogota, O.; Goldenzweig, P.; Gradl, W.; Grammatico, T.; Granderath, S.; Graziani, E.; Greenwald, D.; Gruberová, Z.; Gu, T.; Guan, Y.; Gudkova, K.; Halder, S.; Han, Y.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hazra, S.; Hearty, C.; Hedges, M. T.; Heidelbach, A.; Heredia de la Cruz, I.; Hernández Villanueva, M.; Hershenhorn, A.; Higuchi, T.; Hill, E. C.; Hoek, M.; Hohmann, M.; Horak, P.; Hsu, C. -L.; Humair, T.; Iijima, T.; Inami, K.; Inguglia, G.; Ipsita, N.; Ishikawa, A.; Ito, S.; Itoh, R.; Iwasaki, M.; Jackson, P.; Jacobs, W. W.; Jang, E. -J.; Ji, Q. P.; Jia, S.; Jin, Y.; Johnson, A.; Joo, K. K.; Junkerkalefeld, H.; Kaleta, M.; Kalita, D.; Kaliyar, A. B.; Kandra, J.; Kang, K. H.; Kang, S.; Karyan, G.; Kawasaki, T.; Keil, F.; Ketter, C.; Kiesling, C.; Kim, C. -H.; Kim, D. Y.; Kim, K. -H.; Kim, Y. -K.; Kindo, H.; Kinoshita, K.; Kodyš, P.; Koga, T.; Kohani, S.; Kojima, K.; Konno, T.; Korobov, A.; Korpar, S.; Kovalenko, E.; Kowalewski, R.; Kraetzschmar, T. M. G.; Križan, P.; Krokovny, P.; Kulii, Y.; Kuhr, T.; Kumar, J.; Kumar, M.; Kumar, R.; Kumara, K.; Kunigo, T.; Kuzmin, A.; Kwon, Y. -J.; Lacaprara, S.; Lai, Y. -T.; Lam, T.; Lanceri, L.; Lange, J. S.; Laurenza, M.; Leboucher, R.; Le Diberder, F. R.; Leitl, P.; Levit, D.; Lewis, P. M.; Li, C.; Li, L. K.; Libby, J.; Liu, Q. Y.; Liu, Z. Q.; Liventsev, D.; Longo, S.; Lueck, T.; Lyu, C.; Ma, Y.; Maggiora, M.; Maharana, S. P.; Maiti, R.; Maity, S.; Mancinelli, G.; Manfredi, R.; Manoni, E.; Manthei, A. C.; Mantovano, M.; Marcantonio, D.; Marcello, S.; Marinas, C.; Martel, L.; Martellini, C.; Martini, A.; Martinov, T.; Massaccesi, L.; Masuda, M.; Matsuda, T.; Matsuoka, K.; Matvienko, D.; Maurya, S. K.; McKenna, J. A.; Mehta, R.; Meier, F.; Merola, M.; Metzner, F.; Milesi, M.; Miller, C.; Mirra, M.; Miyabayashi, K.; Mizuk, R.; Mohanty, G. B.; Molina-Gonzalez, N.; Mondal, S.; Moneta, S.; Moser, H. -G.; Mrvar, M.; Mussa, R.; Nakamura, I.; Nakamura, K. R.; Nakao, M.; Nakazawa, Y.; Narimani Charan, A.; Naruki, M.; Natkaniec, Z.; Natochii, A.; Nayak, L.; Nayak, M.; Nazaryan, G.; Niebuhr, C.; Nisar, N. K.; Nishida, S.; Ogawa, S.; Onishchuk, Y.; Ono, H.; Onuki, Y.; Oskin, P.; Otani, F.; Pakhlov, P.; Pakhlova, G.; Paladino, A.; Panta, A.; Paoloni, E.; Pardi, S.; Parham, K.; Park, H.; Park, S. -H.; Paschen, B.; Passeri, A.; Patra, S.; Paul, S.; Pedlar, T. K.; Peruzzi, I.; Peschke, R.; Pestotnik, R.; Pham, F.; Piccolo, M.; Piilonen, L. E.; Podesta-Lerma, P. L. M.; Podobnik, T.; Pokharel, S.; Polat, L.; Praz, C.; Prell, S.; Prencipe, E.; Prim, M. T.; Purwar, H.; Rados, P.; Raeuber, G.; Raiz, S.; Reif, M.; Reiter, S.; Remnev, M.; Ripp-Baudot, I.; Rizzo, G.; Robertson, S. H.; Roehrken, M.; Roney, J. M.; Rostomyan, A.; Rout, N.; Russo, G.; Sahoo, D.; Sandilya, S.; Sangal, A.; Santelj, L.; Sato, Y.; Savinov, V.; Scavino, B.; Schmitt, C.; Schwanda, C.; Schwartz, A. J.; Seino, Y.; Selce, A.; Senyo, K.; Serrano, J.; Sevior, M. E.; Sfienti, C.; Shan, W.; Sharma, C.; Shen, C. P.; Shi, X. D.; Shillington, T.; Shiu, J. -G.; Shtol, D.; Sibidanov, A.; Simon, F.; Singh, J. B.; Skorupa, J.; Sobie, R. J.; Sobotzik, M.; Soffer, A.; Sokolov, A.; Solovieva, E.; Spataro, S.; Spruck, B.; Starič, M.; Stavroulakis, P.; Stefkova, S.; Stottler, Z. S.; Stroili, R.; Strube, J.; Sue, Y.; Sumihama, M.; Sumisawa, K.; Sutcliffe, W.; Svidras, H.; Takahashi, M.; Takizawa, M.; Tamponi, U.; Tanida, K.; Taniguchi, N.; Tenchini, F.; Thaller, A.; Tittel, O.; Tiwary, R.; Tonelli, D.; Torassa, E.; Toutounji, N.; Trabelsi, K.; Tsaklidis, I.; Uchida, M.; Ueda, I.; Uematsu, Y.; Uglov, T.; Unger, K.; Unno, Y.; Uno, K.; Uno, S.; Urquijo, P.; Ushiroda, Y.; Vahsen, S. E.; van Tonder, R.; Varner, G. S.; Varvell, K. E.; Veronesi, M.; Vinokurova, A.; Vismaya, V. S.; Vitale, L.; Vobbilisetti, V.; Volpe, R.; Wach, B.; Waheed, E.; Wakai, M.; Wakeling, H. M.; Wallner, S.; Wang, E.; Wang, M. -Z.; Wang, Z.; Warburton, A.; Watanabe, M.; Watanuki, S.; Welsch, M.; Wessel, C.; Won, E.; Xu, X. P.; Yabsley, B. D.; Yamada, S.; Yan, W.; Yang, S. B.; Yelton, J.; Yin, J. H.; Yoshihara, K.; Yuan, C. Z.; Yusa, Y.; Zani, L.; Zhilich, V.; Zhou, J. S.; Zhou, Q. D.; Zhou, X. Y.; Zhukova, V. I. (American Physical Society (APS), 2023-11)
  • Precise Measurement of the Ds+ Lifetime at Belle II
    Adachi, I.; Aggarwal, L.; Aihara, H.; Akopov, N.; Aloisio, A.; Anh Ky, N.; Asner, D. M.; Atmacan, H.; Aushev, T.; Aushev, V.; Aversano, M.; Babu, V.; Bae, H.; Bahinipati, S.; Bambade, P.; Banerjee, S.; Barrett, M.; Baudot, J.; Bauer, M.; Baur, A.; Beaubien, A.; Becker, J.; Behera, P. K.; Bennett, J. V.; Bernlochner, F. U.; Bertacchi, V.; Bertemes, M.; Bertholet, E.; Bessner, M.; Bettarini, S.; Bhuyan, B.; Bianchi, F.; Bilka, T.; Biswas, D.; Bodrov, D.; Bondar, A.; Bozek, A.; Bračko, M.; Branchini, P.; Briere, R. A.; Browder, T. E.; Budano, A.; Bussino, S.; Campajola, M.; Cao, L.; Casarosa, G.; Cecchi, C.; Cerasoli, J.; Chang, M. C.; Chang, P.; Cheema, P.; Chekelian, V.; Cheon, B. G.; Chilikin, K.; Chirapatpimol, K.; Cho, H. E.; Cho, K.; Choi, S. K.; Choudhury, S.; Cochran, J.; Corona, L.; Das, S.; Dattola, F.; De La Motte, S. A.; De Marino, G.; De Nardo, G.; De Nuccio, M.; De Pietro, G.; De Sangro, R.; Destefanis, M.; Dey, S.; Dhamija, R.; Di Canto, A.; Di Capua, F.; Dingfelder, J.; DoleŽal, Z.; Domínguez Jiménez, I.; Dong, T. V.; Dorigo, M.; Dort, K.; Dreyer, S.; Dubey, S.; Dujany, G.; Ecker, P.; Epifanov, D.; Feichtinger, P.; Ferlewicz, D.; Finck, C.; Finocchiaro, G.; Fodor, A.; Forti, F.; Frey, A.; Fulsom, B. G.; Gabrielli, A.; Ganiev, E.; Garcia-Hernandez, M.; Garmash, A.; Gaudino, G.; Gaur, V.; Gaz, A. (American Physical Society (APS), 2023-10-27)
    We measure the lifetime of the Ds+ meson using a data sample of 207 fb-1 collected by the Belle II experiment running at the SuperKEKB asymmetric-energy e+e- collider. The lifetime is determined by fitting the decay-time distribution of a sample of 116×103 Ds+→φπ+ decays. Our result is τDs+=(499.5±1.7±0.9) fs, where the first uncertainty is statistical and the second is systematic. This result is significantly more precise than previous measurements.
  • Measurement of CP asymmetries in B0→ϕKs0 decays with Belle II
    Adachi, I.; Adamczyk, K.; Aggarwal, L.; Ahmed, H.; Aihara, H.; Akopov, N.; Aloisio, A.; Anh Ky, N.; Asner, D. M.; Atmacan, H.; Aushev, T.; Aushev, V.; Aversano, M.; Babu, V.; Bae, H.; Bahinipati, S.; Bambade, P.; Banerjee, Sw; Barrett, M.; Baudot, J.; Bauer, M.; Baur, A.; Beaubien, A.; Becherer, F.; Becker, J.; Behera, P. K.; Bennett, J. V.; Bertacchi, V.; Bertemes, M.; Bertholet, E.; Bessner, M.; Bettarini, S.; Bhuyan, B.; Bianchi, F.; Bilka, T.; Biswas, D.; Bobrov, A.; Bodrov, D.; Bolz, A.; Bondar, A.; Borah, J.; Bozek, A.; Bračko, M.; Branchini, P.; Briere, R. A.; Browder, T. E.; Budano, A.; Bussino, S.; Campajola, M.; Cao, L.; Casarosa, G.; Cecchi, C.; Cerasoli, J.; Chang, M. -C.; Chang, P.; Cheema, P.; Chekelian, V.; Chen, C.; Cheon, B. G.; Chilikin, K.; Chirapatpimol, K.; Cho, H. -E.; Cho, K.; Cho, S. -J.; Choi, S. -K.; Choudhury, S.; Cochran, J.; Corona, L.; Cremaldi, L. M.; Das, S.; Dattola, F.; De La Cruz-Burelo, E.; De La Motte, S. A.; De Nardo, G.; De Nuccio, M.; De Pietro, G.; de Sangro, R.; Destefanis, M.; Dey, S.; De Yta-Hernandez, A.; Dhamija, R.; Di Canto, A.; Di Capua, F.; Dingfelder, J.; Doležal, Z.; Domínguez Jiménez, I.; Dong, T. V.; Dorigo, M.; Dort, K.; Dreyer, S.; Dubey, S.; Dujany, G.; Ecker, P.; Eliachevitch, M.; Feichtinger, P.; Ferber, T.; Ferlewicz, D.; Fillinger, T.; Finck, C.; Finocchiaro, G.; Fodor, A.; Forti, F.; Frey, A.; Fulsom, B. G.; Gabrielli, A.; Ganiev, E.; Garcia-Hernandez, M.; Garmash, A.; Gaudino, G.; Gaur, V.; Gaz, A.; Gellrich, A.; Ghevondyan, G.; Ghosh, D.; Ghumaryan, H.; Giakoustidis, G.; Giordano, R.; Giri, A.; Glazov, A.; Gobbo, B.; Godang, R.; Gogota, O.; Goldenzweig, P.; Gradl, W.; Grammatico, T.; Granderath, S.; Graziani, E.; Greenwald, D.; Gruberová, Z.; Gu, T.; Guan, Y.; Gudkova, K.; Halder, S.; Han, Y.; Hara, K.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hazra, S.; Hearty, C.; Hedges, M. T.; Heredia de la Cruz, I.; Hernández Villanueva, M.; Hershenhorn, A.; Higuchi, T.; Hill, E. C.; Hoek, M.; Hohmann, M.; Horak, P.; Hsu, C. -L.; Humair, T.; Iijima, T.; Inami, K.; Ipsita, N.; Ishikawa, A.; Ito, S.; Itoh, R.; Iwasaki, M.; Jackson, P.; Jacobs, W. W.; Jang, E. -J.; Ji, Q. P.; Jia, S.; Jin, Y.; Johnson, A.; Joo, K. K.; Junkerkalefeld, H.; Kaliyar, A. B.; Kandra, J.; Kang, K. H.; Kang, S.; Karyan, G.; Kawasaki, T.; Keil, F.; Ketter, C.; Kiesling, C.; Kim, C. -H.; Kim, D. Y.; Kim, K. -H.; Kim, Y. -K.; Kindo, H.; Kinoshita, K.; Kodyš, P.; Koga, T.; Kohani, S.; Kojima, K.; Konno, T.; Korobov, A.; Korpar, S.; Kovalenko, E.; Kowalewski, R.; Kraetzschmar, T. M. G.; Križan, P.; Krokovny, P.; Kulii, Y.; Kuhr, T.; Kumar, M.; Kumara, K.; Kunigo, T.; Kuzmin, A.; Kwon, Y. -J.; Lacaprara, S.; Lai, Y. -T.; Lam, T.; Lanceri, L.; Lange, J. S.; Laurenza, M.; Lautenbach, K.; Leboucher, R.; Le Diberder, F. R.; Lee, M. J.; Leitl, P.; Levit, D.; Lewis, P. M.; Li, C.; Li, L. K.; Libby, J.; Liu, Q. Y.; Liu, Z. Q.; Liventsev, D.; Longo, S.; Lozar, A.; Lueck, T.; Lyu, C.; Ma, Y.; Maggiora, M.; Maharana, S. P.; Maiti, R.; Maity, S.; Mancinelli, G.; Manfredi, R.; Manoni, E.; Mantovano, M.; Marcantonio, D.; Marcello, S.; Marinas, C.; Martel, L.; Martellini, C.; Martini, A.; Martinov, T.; Massaccesi, L.; Masuda, M.; Matsuda, T.; Matsuoka, K.; Matvienko, D.; Maurya, S. K.; McKenna, J. A.; Mehta, R.; Meier, F.; Merola, M.; Metzner, F.; Milesi, M.; Miller, C.; Mirra, M.; Miyabayashi, K.; Mizuk, R.; Mohanty, G. B.; Molina-Gonzalez, N.; Mondal, S.; Moneta, S.; Moser, H. -G.; Mrvar, M.; Mussa, R.; Nakamura, I.; Nakao, M.; Nakazawa, Y.; Narimani Charan, A.; Naruki, M.; Natkaniec, Z.; Natochii, A.; Nayak, L.; Nayak, M.; Nazaryan, G.; Niebuhr, C.; Nisar, N. K.; Nishida, S.; Ogawa, S.; Ono, H.; Onuki, Y.; Oskin, P.; Otani, F.; Pakhlov, P.; Pakhlova, G.; Paladino, A.; Panta, A.; Paoloni, E.; Pardi, S.; Parham, K.; Park, H.; Park, S. -H.; Paschen, B.; Passeri, A.; Patra, S.; Paul, S.; Pedlar, T. K.; Peruzzi, I.; Peschke, R.; Pestotnik, R.; Pham, F.; Piccolo, M.; Piilonen, L. E.; Podesta-Lerma, P. L. M.; Podobnik, T.; Pokharel, S.; Polat, L.; Praz, C.; Prell, S.; Prencipe, E.; Prim, M. T.; Purwar, H.; Rad, N.; Rados, P.; Raeuber, G.; Raiz, S.; Reif, M.; Reiter, S.; Remnev, M.; Ripp-Baudot, I.; Rizzo, G.; Rizzuto, L. B.; Robertson, S. H.; Roehrken, M.; Roney, J. M.; Rostomyan, A.; Rout, N.; Russo, G.; Sanders, D. A.; Sandilya, S.; Sangal, A.; Santelj, L.; Sato, Y.; Savinov, V.; Scavino, B.; Schmitt, C.; Schnepf, M.; Schwanda, C.; Schwartz, A. J.; Seino, Y.; Selce, A.; Senyo, K.; Serrano, J.; Sevior, M. E.; Sfienti, C.; Shan, W.; Sharma, C.; Shi, X. D.; Shillington, T.; Shiu, J. -G.; Shtol, D.; Shwartz, B.; Sibidanov, A.; Simon, F.; Singh, J. B.; Skorupa, J.; Sobie, R. J.; Sobotzik, M.; Soffer, A.; Sokolov, A.; Solovieva, E.; Spataro, S.; Spruck, B.; Starič, M.; Stavroulakis, P.; Stefkova, S.; Stottler, Z. S.; Stroili, R.; Strube, J.; Sumihama, M.; Sumisawa, K.; Sutcliffe, W.; Svidras, H.; Takahashi, M.; Takizawa, M.; Tamponi, U.; Tanaka, S.; Tanida, K.; Tanigawa, H.; Tenchini, F.; Thaller, A.; Tittel, O.; Tiwary, R.; Tonelli, D.; Torassa, E.; Toutounji, N.; Trabelsi, K.; Tsaklidis, I.; Uchida, M.; Ueda, I.; Uematsu, Y.; Uglov, T.; Unger, K.; Unno, Y.; Uno, K.; Uno, S.; Urquijo, P.; Ushiroda, Y.; Vahsen, S. E.; van Tonder, R.; Varner, G. S.; Varvell, K. E.; Veronesi, M.; Vinokurova, A.; Vismaya, V. S.; Vitale, L.; Vobbilisetti, V.; Volpe, R.; Wach, B.; Wakai, M.; Wakeling, H. M.; Wallner, S.; Wang, E.; Wang, M. -Z.; Wang, Z.; Warburton, A.; Watanabe, M.; Watanuki, S.; Welsch, M.; Wessel, C.; Won, E.; Xu, X. P.; Yabsley, B. D.; Yamada, S.; Yan, W.; Yang, S. B.; Yin, J. H.; Yoshihara, K.; Yuan, C. Z.; Yusa, Y.; Zani, L.; Zhang, Y.; Zhilich, V.; Zhou, J. S.; Zhou, Q. D.; Zhukova, V. I. (American Physical Society (APS), 2023-10-01)
  • First measurement of the Q2 distribution of X(3915) single-tag two-photon production
    Teramoto, Y.; Uehara, S.; Adachi, I.; Aihara, H.; Al Said, S.; Asner, D. M.; Aushev, T.; Ayad, R.; Babu, V.; Banerjee, Sw; Behera, P.; Belous, K.; Bennett, J.; Bessner, M.; Bhardwaj, V.; Bilka, T.; Biswas, D.; Bodrov, D.; Borah, J.; Bozek, A.; Bra, M.; Branchini, P.; Browder, T. E.; Budano, A.; Campajola, M.; Cervenkov, D.; Chang, M. -C.; Chekelian, V.; Cheon, B. G.; Chilikin, K.; Cho, H. E.; Cho, K.; Cho, S. -J.; Choi, S. -K.; Choi, Y.; Choudhury, S.; Cinabro, D.; Das, S.; De Nardo, G.; De Pietro, G.; Dhamija, R.; Di Capua, F.; Dingfelder, J.; Dolezal, Z.; V. Dong, T.; Epifanov, D.; Ferlewicz, D.; Frey, A.; Fulsom, B. G.; Gaur, V.; Garmash, A.; Giri, A.; Goldenzweig, P.; Graziani, E.; Gu, T.; Gudkova, K.; Hadjivasiliou, C.; Halder, S.; Han, X.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hedges, M. T.; Herrmann, D.; Hou, W. -S.; Hsu, C. -L.; Iijima, T.; Inami, K.; Inguglia, G.; Ipsita, N.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Jacobs, W. W.; Jang, E. -J.; Ji, Q. P.; Jin, Y.; Joo, K. K.; Kaliyar, A. B.; Kang, K. H.; Kawasaki, T.; Kiesling, C.; Kim, C. H.; Kim, D. Y.; Kim, K. -H.; Kim, Y. -K.; Kodys, P.; Konno, T.; Korobov, A.; Korpar, S.; Krizan, P.; Krokovny, P.; Kuhr, T.; Kumar, M.; Kumara, K.; Kwon, Y. -J.; Lalwani, K.; Lam, T.; Lange, J. S.; Laurenza, M.; Lee, S. C.; Levit, D.; Li, L. K.; Li, Y.; Gioi, L. Li; Libby, J.; Lin, Y. -R.; Liventsev, D.; Luo, T.; Masuda, M.; Matvienko, D.; Maurya, S. K.; Merola, M.; Metzner, F.; Miyabayashi, K.; Mizuk, R.; Mussa, R.; Nakamura, I.; Nakao, M.; Nakazawa, H.; Narwal, D.; Natkaniec, Z.; Natochii, A.; Nayak, L.; Nisar, N. K.; Nishida, S.; Ogawa, K.; Ogawa, S.; Ono, H.; Onuki, Y.; Oskin, P.; Pakhlov, P.; Pakhlova, G.; Pang, T.; Pardi, S.; Park, J.; Park, S. -H.; Patra, S.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Podobnik, T.; Prencipe, E.; Prim, M. T.; Rabusov, A.; Rohrken, M.; Russo, G.; Sandilya, S.; Sangal, A.; Santelj, L.; Savinov, V.; Schnell, G.; Schwanda, C.; Seino, Y.; Senyo, K.; Sevior, M. E.; Shan, W.; Shapkin, M.; Sharma, C.; Shen, C. P.; Shiu, J. -G.; Shwartz, B.; Simon, F.; Singh, J. B.; Sokolov, A.; Solovieva, E.; Staric, M.; Stottler, Z. S.; Sumihama, M.; Sumiyoshi, T.; Takizawa, M.; Tamponi, U.; Tanida, K.; Tenchini, F.; Trabelsi, K.; Uchida, M.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Vahsen, S. E.; van Tonder, R.; Varner, G.; Vinokurova, A.; Vossen, A.; Wang, D.; Wang, M. -Z.; Wang, X. L.; Watanabe, M.; Won, E.; Xu, X.; Yabsley, B. D.; Yan, W.; Yang, S. B.; Yelton, J.; Yin, J. H.; Yook, Y.; Yuan, C. Z.; Yuan, L.; Yusa, Y.; Zhang, Z. P.; Zhilich, V.; Belle, Collaboration (AMER PHYSICAL SOC, 2023-07-11)
    We report the first measurement of the Q2 distribution of X(3915) produced by single-tag two-photon interactions. The decay mode used is X(3915)→J/ψω. The covered Q2 region is from 1.5 (GeV/c)2 to 10.0 (GeV/c)2. We observe 7.9±3.1(stat)±1.5(syst) events, where we expect 4.1±0.7 events based on the Q2=0 result from the no-tag two-photon process, extrapolated to higher Q2 region using the cc¯ model of Schuler, Berends, and van Gulik. The shape of the distribution is also consistent with this model; we note that statistical uncertainties are large.
  • First Measurement of the Michel Parameter?0 in the t- ? μ- ?-μ?t Decay at Belle
    Bodrov, D.; Pakhlov, P.; Adachi, I.; Aihara, H.; Al Said, S.; Asner, D. M.; Atmacan, H.; Aushev, T.; Ayad, R.; Babu, V.; Banerjee, Sw; Behera, P.; Belous, K.; Bennett, J.; Bessner, M.; Bhuyan, B.; Bilka, T.; Biswas, D.; Bobrov, A.; Bondar, A.; Borah, J.; Bozek, A.; Bracko, M.; Branchini, P.; Browder, T. E.; Budano, A.; Campajola, M.; Cervenkov, D.; Chang, M. -C.; Cheon, B. G.; Chilikin, K.; Cho, H. E.; Cho, K.; Cho, S. -J.; Choi, S. -K.; Choi, Y.; Choudhury, S.; Cinabro, D.; Das, S.; De Nardo, G.; De Pietro, G.; Dhamija, R.; Di Capua, F.; Dingfelder, J.; Dolezal, Z.; Dong, T. V.; Epifanov, D.; Ferber, T.; Ferlewicz, D.; Fulsom, B. G.; Gaur, V.; Garmash, A.; Giri, A.; Goldenzweig, P.; Graziani, E.; Greenwald, D.; Gu, T.; Guan, Y.; Gudkova, K.; Hadjivasiliou, C.; Halder, S.; Hayasaka, K.; Hayashii, H.; Hedges, M. T.; Herrmann, D.; Hou, W. -S.; Hsu, C. -L.; Iijima, T.; Inami, K.; Ipsita, N.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Jacobs, W. W.; Jang, E. -J.; Ji, Q. P.; Jia, S.; Jin, Y.; Joo, K. K.; Kalita, D.; Kaliyar, A. B.; Kawasaki, T.; Kiesling, C.; Kim, C. H.; Kim, D. Y.; Kim, K. -H.; Kim, Y. -K.; Kindo, H.; Kinoshita, K.; Kodys, P.; Korpar, S.; Krizan, P.; Krokovny, P.; Kuhr, T.; Kumar, M.; Kumar, R.; Kumara, K.; Kwon, Y. -J.; Lange, J. S.; Lee, S. C.; Li, J.; Li, L. K.; Libby, J.; Lieret, K.; Lin, Y. -R.; Liventsev, D.; Luo, T.; Ma, Y.; Masuda, M.; Matsuda, T.; Maurya, S. K.; Meier, F.; Merola, M.; Metzner, F.; Miyabayashi, K.; Mizuk, R.; Mohanty, G. B.; Mussa, R.; Nakao, M.; Narwal, D.; Natkaniec, Z.; Natochii, A.; Nayak, L.; Nayak, M.; Nisar, N. K.; Nishida, S.; Ogawa, S.; Oskin, P.; Pakhlova, G.; Pardi, S.; Park, H.; Park, J.; Park, S. -H.; Passeri, A.; Patra, S.; Paul, S.; Pestotnik, R.; Piilonen, L. E.; Podobnik, T.; Prencipe, E.; Prim, M. T.; Rabusov, A.; Rout, N.; Russo, G.; Sandilya, S.; Sangal, A.; Santelj, L.; Savinov, V.; Schnell, G.; Schwanda, C.; Seino, Y.; Senyo, K.; Shan, W.; Shapkin, M.; Sharma, C.; Shiu, J. -G.; Singh, J. B.; Sokolov, A.; Solovieva, E.; Staric, M.; Stottler, Z. S.; Sumihama, M.; Takizawa, M.; Tamponi, U.; Tanida, K.; Tenchini, F.; Tiwary, R.; Trabelsi, K.; Uchida, M.; Uglov, T.; Unno, Y.; Uno, K.; Uno, S.; Vahsen, S. E.; Varner, G.; Vinokurova, A.; Vossen, A.; Wang, D.; Wang, E.; Wang, M. -Z.; Watanuki, S.; Werbycka, O.; Xu, X.; Yabsley, B. D.; Yan, W.; Yang, S. B.; Yelton, J.; Yin, J. H.; Yuan, C. Z.; Yusa, Y.; Zhang, Z. P.; Zhilich, V.; Zhukova, V. (AMER PHYSICAL SOC, 2023-07-11)
    We report the first measurement of the Michel parameter ζ′ in the τ-→μ-ν¯μντ decay with a new method proposed just recently. The measurement is based on the reconstruction of the τ-→μ-ν¯μντ events with subsequent muon decay in flight in the Belle central drift chamber. The analyzed data sample of 988 fb-1 collected by the Belle detector corresponds to approximately 912×106 τ+τ- pairs. We measure ζ′=0.22±0.94(stat)±0.42(syst), which is in agreement with the standard model prediction of ζ′=1. Statistical uncertainty dominates in this study, being a limiting factor, while systematic uncertainty is well under control. Our analysis proved the practicability of this promising method and its prospects for further precise measurement in future experiments.
  • Measurement of differential distributions of B. D l.l and implications on jVcbj
    Prim, M. T.; Bernlochner, F.; Metzner, F.; Lieret, K.; Kuhr, T.; Adachi, I.; Aihara, H.; Al Said, S.; Asner, D. M.; Atmacan, H.; Aulchenko, V.; Aushev, T.; Ayad, R.; Babu, V.; Bahinipati, S.; Banerjee, Sw; Bauer, M.; Behera, P.; Bennett, J.; Bessner, M.; Bhardwaj, V.; Bhuyan, B.; Bilka, T.; Biswas, D.; Bodrov, D.; Borah, J.; Bozek, A.; Bracko, M.; Branchini, P.; Browder, T. E.; Budano, A.; Campajola, M.; Cao, L.; Cervenkov, D.; Chang, M. -C.; Chekelian, V.; Cheon, B. G.; Chilikin, K.; Cho, H. E.; Cho, K.; Choi, Y.; Choudhury, S.; Cinabro, D.; Das, S.; Dash, N.; de Marino, G.; De Nardo, G.; De Pietro, G.; Dhamija, R.; Di Capua, F.; Dingfelder, J.; Dole, Z.; Dong, T.; Epifanov, D.; Ferber, T.; Ferlewicz, D.; Frey, A.; Fulsom, B. G.; Gaur, V.; Garmash, A.; Giri, A.; Goldenzweig, P.; Graziani, E.; Gu, T.; Gudkova, K.; Hadjivasiliou, C.; Halder, S.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hedges, M. T.; Herrmann, D.; Villanueva, M. Hernandez; Hsu, C. -L.; Iijima, T.; Inami, K.; Inguglia, G.; Ipsita, N.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Jacobs, W. W.; Jang, E. -J.; Jia, S.; Jin, Y.; Joo, K. K.; Kaliyar, A. B.; Kang, K. H.; Kawasaki, T.; Kiesling, C.; Kim, C. H.; Kim, D. Y.; Kim, K. -H.; Kim, Y. -K.; Kinoshita, K.; Kody, P.; Konno, T.; Korobov, A.; Korpar, S.; Kovalenko, E.; Kri, P.; Krokovny, P.; Kumar, M.; Kumar, R.; Kumara, K.; Kuzmin, A.; Kwon, Y. -J.; Lalwani, K.; Lange, J. S.; Laurenza, M.; Lee, S. C.; Lewis, P.; Li, J.; Li, L. K.; Li, Y.; Libby, J.; Lin, Y. -R.; Liventsev, D.; Luo, T.; Masuda, M.; Matsuda, T.; Matvienko, D.; Maurya, S. K.; Meier, F.; Merola, M.; Miyabayashi, K.; Mizuk, R.; Mohanty, G. B.; Nakamura, I.; Nakao, M.; Natkaniec, Z.; Natochii, A.; Nayak, L.; Nisar, N. K.; Nishida, S.; Ogawa, K.; Ogawa, S.; Ono, H.; Oskin, P.; Pakhlov, P.; Pakhlova, G.; Pang, T.; Pardi, S.; Park, H.; Park, J.; Park, S. -H.; Passeri, A.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Podobnik, T.; Prencipe, E.; Rabusov, A.; Roehrken, M.; Rostomyan, A.; Rout, N.; Russo, G.; Sandilya, S.; Sangal, A.; Santelj, L.; Savinov, V.; Schnell, G.; Schwanda, C.; Schwartz, A. J.; Seino, Y.; Senyo, K.; Sevior, M. E.; Shan, W.; Shapkin, M.; Sharma, C.; Shiu, J. -G.; Shwartz, B.; Simon, F.; Soffer, A.; Sokolov, A.; Solovieva, E.; Stari, M.; Sumihama, M.; Sumiyoshi, T.; Takizawa, M.; Tamponi, U.; Tanida, K.; Tenchini, F.; Trabelsi, K.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Vahsen, S. E.; van Tonder, R.; Varner, G.; Varvell, K. E.; Vinokurova, A.; Vossen, A.; Waheed, E.; Wang, D.; Wang, M. -Z.; Watanabe, M.; Watanuki, S.; Won, E.; Yabsley, B. D.; Yan, W.; Yang, S. B.; Yelton, J.; Yook, Y.; Yuan, C. Z.; Yuan, L.; Yusa, Y.; Zhai, Y.; Zhang, Z. P.; Zhilich, V.; Zhukova, V. (AMER PHYSICAL SOC, 2023-07-07)
    We present a measurement of the differential shapes of exclusive B→D∗ℓν¯ℓ (B=B-,B¯0 and ℓ=e, μ) decays with hadronic tag-side reconstruction for the full 711 fb-1 Belle dataset. We extract the Caprini-Lellouch-Neubert (CLN) and Boyd-Grinstein-Lebed (BGL) form factor parameters and use an external input for the absolute branching fractions to determine the Cabibbo-Kobayashi-Maskawa matrix element and find |Vcb|CLN=(40.2±0.9)×10-3 and |Vcb|BGL=(40.7±1.0)×10-3 with the zero-recoil lattice QCD point F(1)=0.906±0.013. We also perform a study of the impact of beyond zero-recoil lattice QCD calculations on the |Vcb| determinations. Additionally, we present the lepton-flavor universality ratio Reμ=B(B→D∗eν¯e)/B(B→D∗μν¯μ)=0.993±0.023±0.023, the electron and muon forward-backward asymmetry and their difference ΔAFB=0.028±0.028±0.008, and the electron and muon D∗ longitudinal polarization fraction and their difference ΔFLD∗=0.030±0.025±0.007. The uncertainties quoted correspond to the statistical and systematic uncertainties, respectively.
  • Novel method for the identification of the production flavor of neutral charmed mesons
    Adachi, I.; Aggarwal, L.; Ahmed, H.; Aihara, H.; Akopov, N.; Aloisio, A.; Ky, N. Anh; Asner, D. M.; Atmacan, H.; Aushev, T.; Aushev, V.; Aversano, M.; Babu, V.; Bae, H.; Bahinipati, S.; Bambade, P.; Banerjee, Sw; Barrett, M.; Baudot, J.; Bauer, M.; Baur, A.; Beaubien, A.; Becker, J.; Behera, P. K.; Bennett, V. J.; Bernlochner, F. U.; Bertacchi, V.; Bertemes, M.; Bertholet, E.; Bessner, M.; Bettarini, S.; Bhuyan, B.; Bianchi, F.; Bilka, T.; Biswas, D.; Bobrov, A.; Bodrov, D.; Bolz, A.; Bondar, A.; Borah, J.; Bozek, A.; Bracko, M.; Branchini, P.; Briere, R. A.; Browder, T. E.; Budano, A.; Bussino, S.; Campajola, M.; Cao, L.; Casarosa, G.; Cecchi, C.; Cerasoli, J.; Chang, M. -C.; Chang, P.; Cheaib, R.; Cheema, P.; Chekelian, V.; Cheon, B. G.; Chilikin, K.; Chirapatpimol, K.; Cho, H. -E.; Cho, K.; Cho, S. -J.; Choi, S. -K.; Choudhury, S.; Corona, L.; Cremaldi, L. M.; Das, S.; Dattola, F.; Cruz-Burelo, E. De La; Motte, SA De La A. D. L.; De Nardo, G.; De Nuccio, M.; De Pietro, G.; de Sangro, R.; Destefanis, M.; De Yta-Hernandez, A.; Dhamija, R.; Di Canto, A.; Di Capua, F.; Dingfelder, J.; Dole, Z.; Jimenez, I. Dominguez; V. Dong, T.; Dorigo, M.; Dort, K.; Dreyer, S.; Dubey, S.; Dujany, G.; Ecker, P.; Eliachevitch, M.; Feichtinger, P.; Ferber, T.; Ferlewicz, D.; Fillinger, T.; Finck, C.; Finocchiaro, G.; Fodor, A.; Forti, F.; Frey, A.; Fulsom, B. G.; Gabrielli, A.; Ganiev, E.; Garcia-Hernandez, M.; Gaudino, G.; Gaur, V.; Gaz, A.; Gellrich, A.; Ghevondyan, G.; Ghosh, D.; Giakoustidis, G.; Giordano, R.; Giri, A.; Gobbo, B.; Godang, R.; Goldenzweig, P.; Gradl, W.; Grammatico, T.; Granderath, S.; Graziani, E.; Greenwald, D.; Gruberova, Z.; Gu, T.; Guan, Y.; Gudkova, K.; Halder, S.; Han, Y.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hazra, S.; Hearty, C.; Hedges, M. T.; Cruz, I. Heredia de la D. L.; Villanueva, M. Hernandez; Hershenhorn, A.; Higuchi, T.; Hill, E. C.; Hoek, M.; Hohmann, M.; Hsu, C. -L.; Iijima, T.; Inami, K.; Inguglia, G.; Ipsita, N.; Ishikawa, A.; Ito, S.; Itoh, R.; Iwasaki, M.; Jackson, P.; Jacobs, W. W.; Jaffe, D. E.; Jang, E. -J.; Ji, Q. P.; Jia, S.; Jin, Y.; Johnson, A.; Joo, K. K.; Junkerkalefeld, H.; Kakuno, H.; Kaliyar, A. B.; Kandra, J.; Kang, K. H.; Kang, S.; Karyan, G.; Kawasaki, T.; Keil, F.; Ketter, C.; Kiesling, C.; Kim, C. -H.; Kim, K. -H.; Kim, Y. -K.; Kinoshita, K.; Kody, P.; Koga, T.; Kohani, S.; Korobov, A.; Korpar, S.; Kovalenko, E.; Kowalewski, R.; Kraetzschmar, T. M. G.; Krizan, P.; Krokovny, P.; Kumar, M.; Kumara, K.; Kunigo, T.; Kuzmin, A.; Kwon, Y. -J.; Lacaprara, S.; Lai, Y. -T.; Lam, T.; Lange, J. S.; Laurenza, M.; Lautenbach, K.; Leboucher, R.; Diberder, FR Le R. L.; Leitl, P.; Levit, D.; Li, C.; Li, L. K.; Libby, J.; Liu, Q. Y.; Liu, Z. Q.; Longo, S.; Lozar, A.; Lueck, T.; Lyu, C.; Ma, Y.; Maggiora, M.; Maiti, R.; Maity, S.; Mancinelli, G.; Manfredi, R.; Manoni, E.; Manthei, A. C.; Mantovano, M.; Marcantonio, D.; Marcello, S.; Marinas, C.; Martel, L.; Martellini, C.; Martini, A.; Martinov, T.; Massaccesi, L.; Masuda, M.; Matvienko, D.; Maurya, S. K.; Mckenna, J. A.; Mehta, R.; Meier, F.; Merola, M.; Metzner, F.; Milesi, M.; Miller, C.; Mirra, M.; Miyabayashi, K.; Mizuk, R.; Mohanty, G. B.; Molina-Gonzalez, N.; Mondal, S.; Moneta, S.; Moser, H. -G.; Mussa, R.; Nakamura, I.; Nakazawa, Y.; Charan, A. Narimani; Naruki, M.; Natkaniec, Z.; Natochii, A.; Nayak, L.; Nayak, M.; Nazaryan, G.; Niiyama, M.; Nisar, N. K.; Nishida, S.; Ogawa, S.; Ono, H.; Onuki, Y.; Oskin, P.; Oxford, E. R.; Pakhlov, P.; Pakhlova, G.; Paladino, A.; Panta, A.; Paoloni, E.; Pardi, S.; Parham, K.; Park, H.; Park, S. -H.; Paschen, B.; Patra, S.; Paul, S.; Pedlar, T. K.; Peschke, R.; Pestotnik, R.; Piccolo, M.; Piilonen, L. E.; Podesta-Lerma, P. L. M.; Podobnik, T.; Pokharel, S.; Polat, L.; Praz, C.; Prell, S.; Prencipe, E.; Rizzo, G.; Rizzuto, L. B.; Robertson, S. H.; Roehrken, M.; Roney, J. M.; Rostomyan, A.; Rout, N.; Sanders, D. A.; Sandilya, S.; Santelj, L.; Sato, Y.; Savinov, V.; Scavino, B.; Schnepf, M.; Schwanda, C.; Seino, Y.; Selce, A.; Senyo, K.; Serrano, J.; Sevior, M. E.; Sfienti, C.; Shan, W.; Sharma, C.; Shi, X. D.; Shillington, T.; Shiu, J. -G.; Shtol, D.; Sibidanov, A.; Simon, F.; Singh, J. B.; Skorupa, J.; Sobie, R. J.; Sobotzik, M.; Soffer, A.; Sokolov, A.; Solovieva, E.; Spataro, S.; Spruck, B.; Stari, M.; Stefkova, S.; Stottler, S.; Stroili, R.; Sumihama, M.; Sutcliffe, W.; Svidras, H.; Takahashi, M.; Takizawa, M.; Tamponi, U.; Tanida, K.; Tenchini, F.; Thaller, A.; Tittel, O.; Tiwary, R.; Tonelli, D.; Torassa, E.; Trabelsi, K.; Tsaklidis, I.; Uchida, M.; Ueda, I.; Uglov, T.; Unger, K.; Unno, Y.; Uno, K.; Uno, S.; Urquijo, P.; Ushiroda, Y.; Vahsen, S. E.; van Tonder, R.; Varner, G. S.; Varvell, K. E.; Vinokurova, A.; Vismaya, V. S.; Vitale, L.; Vobbilisetti, V.; Wach, B.; Wakai, M.; Wakeling, H. M.; Wallner, S.; Wang, E.; Wang, M. -Z.; Wang, L.; Wang, Z.; Warburton, A.; Watanabe, M.; Watanuki, S.; Welsch, M.; Wessel, C.; Won, E.; Xu, P.; Yabsley, B. D.; Yamada, S.; Yan, W.; Yang, S. B.; Yin, J. H.; Yook, Y. M.; Yoshihara, K.; Yuan, C. Z.; Yusa, Y.; Zani, L.; Zhilich, V.; Zhou, J. S.; Zhou, Q. D.; Zhukova, V. I. (AMER PHYSICAL SOC, 2023-06-29)
    We propose a new algorithm for the identification of the production flavor of neutral D mesons in the Belle II experiment. The algorithm exploits the correlation between the flavor of a reconstructed neutral D meson (signal D meson) and the electric charges of particles reconstructed in the rest of the e+e-→cc¯ event. These include those originating from the decay of the other charm hadron produced in the event, as well as those possibly produced in association with the signal D meson. We develop the algorithm using simulation and calibrate it in data using decay modes that identify the flavor of the decaying neutral D meson. We use a data sample of e+e- collisions, corresponding to 362 fb-1 of integrated luminosity, collected by Belle II at center-of-mass energies near the γ(4S) mass. The effective tagging efficiency in data is (47.91±0.07(stat)±0.51(syst))%, independent of the neutral-D-meson decay mode. This charm flavor tagger will approximately double the effective sample size of many CP-violation and charm-mixing measurements that so far have exclusively relied on neutral D mesons originating from D∗± decays. While developed for Belle II, the basic principles underlying the charm flavor tagger can be used in other experiments, including those at hadron colliders.
  • Search for a τ+τ- Resonance in e+e- →μ+μ-τ+τ- Events with the Belle II Experiment
    Adachi, I.; Adamczyk, K.; Aggarwal, L.; Ahmed, H.; Aihara, H.; Akopov, N.; Aloisio, A.; Anh Ky, N.; Asner, D. M.; Atmacan, H.; Aushev, T.; Aushev, V.; Aversano, M.; Babu, V.; Bae, H.; Bahinipati, S.; Bambade, P.; Banerjee, S.; Bansal, S.; Barrett, M.; Baudot, J.; Bauer, M.; Baur, A.; Beaubien, A.; Becker, J.; Behera, P. K.; Bennett, J. V.; Bernieri, E.; Bernlochner, F. U.; Bertacchi, V.; Bertemes, M.; Bertholet, E.; Bessner, M.; Bettarini, S.; Bhardwaj, V.; Bhuyan, B.; Bianchi, F.; Bilka, T.; Bilokin, S.; Biswas, D.; Bobrov, A.; Bodrov, D.; Bolz, A.; Borah, J.; Bozek, A.; Bračko, M.; Branchini, P.; Browder, T. E.; Budano, A.; Bussino, S.; Campajola, M.; Cao, L.; Casarosa, G.; Cecchi, C.; Cerasoli, J.; Chang, M. C.; Chang, P.; Cheaib, R.; Cheema, P.; Chekelian, V.; Chen, Y. Q.; Cheon, B. G.; Chilikin, K.; Chirapatpimol, K.; Cho, H. E.; Cho, K.; Cho, S. J.; Choi, S. K.; Choudhury, S.; Cinabro, D.; Cochran, J.; Corona, L.; Cremaldi, L. M.; Cunliffe, S.; Czank, T.; Das, S.; Dattola, F.; De La Cruz-Burelo, E.; De La Motte, S. A.; De Marino, G.; De Nardo, G.; De Nuccio, M.; De Pietro, G.; De Sangro, R.; Destefanis, M.; Dey, S.; De Yta-Hernandez, A.; Dhamija, R.; Di Canto, A.; Di Capua, F.; Dingfelder, J.; DoleŽal, Z.; Domínguez Jiménez, I.; Dong, T. V.; Dorigo, M.; Dort, K.; Dossett, D.; Dreyer, S.; Dubey, S.; Dujany, G. (American Physical Society (APS), 2023-09-22)
    We report the first search for a nonstandard-model resonance decaying into τ pairs in e+e-→μ+μ-τ+τ- events in the 3.6-10 GeV/c2 mass range. We use a 62.8 fb-1 sample of e+e- collisions collected at a center-of-mass energy of 10.58 GeV by the Belle II experiment at the SuperKEKB collider. The analysis probes three different models predicting a spin-1 particle coupling only to the heavier lepton families, a Higgs-like spin-0 particle that couples preferentially to charged leptons (leptophilic scalar), and an axionlike particle, respectively. We observe no evidence for a signal and set exclusion limits at 90% confidence level on the product of cross section and branching fraction into τ pairs, ranging from 0.7 to 24 fb, and on the couplings of these processes. We obtain world-leading constraints on the couplings for the leptophilic scalar model for masses above 6.5 GeV/c2 and for the axionlike particle model over the entire mass range.