Center for Neutrino Physics

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The 2010 Interim Report of the Long-Baseline Neutrino Experiment Collaboration Physics Working Groups
Collaboration, TLBNE; Akiri, T.; Allspach, D.; Andrews, M.; Arisaka, K.; Arrieta-Diaz, E.; Artuso, M.; Bai, X.; Balantekin, A. B.; Baller, B.; Barletta, W. A.; Barr, G.; Bass, M.; Beck, A.; Becker, B.; Bellini, V.; Benhar, Omar; Berger, B. E.; Bergevin, M.; Berman, E.; Berns, H.; Bernstein, A.; Beroz, F.; Bhatnagar, V.; Bhuyan, B.; Bionta, R.; Bishai, M.; Blake, A.; Blaufuss, E.; Bleakley, B.; Blucher, E.; Blusk, S.; Boehnlein, D.; Bolton, T.; Brack, J.; Bradford, R.; Breedon, R.; Bromberg, C.; Brown, R.; Buchanan, N.; Camilleri, Leslie; Campbell, M.; Carr, Rachel E.; Carminati, G.; Chen, A.; Chen, H.; Cherdack, D.; Chi, C.; Childress, S.; Choudhary, B.; Church, E.; Cline, D.; Coleman, S.; Corey, R.; D'Agostino, M. V.; Davies, G. S.; Dazeley, S.; Jong, J. D.; DeMaat, B.; Demuth, D.; Dighe, A.; Djurcic, Zelimir; Dolph, J.; Drake, G.; Drozhdin, A.; Duan, H.; Duyang, H.; Dye, S.; Dykhuis, T.; Edmunds, D.; Elliott, S.; Enomoto, S.; Escobar, C. O.; Felde, J.; Feyzi, F.; Fleming, B.; Fowler, J.; Fox, W.; Friedland, A.; Fujikawa, B. K.; Gallagher, H.; Garilli, G.; Garvey, G. T.; Gehman, V. M.; Geronimo, G. D.; Gill, R.; Goodman, M.; Goon, J.; Gorbunov, D.; Gran, R.; Guarino, V.; Guarnaccia, E.; Guenette, R.; Gupta, P.; Habig, A.; Hackenburg, R. W.; Hahn, A.; Hahn, R.; Haines, T.; Hans, S.; Harton, J.; Hays, S.; Hazen, E.; He, Q.; Heavey, A.; Heeger, K.; Hellauer, R.; Himmel, A.; Horton-Smith, Glenn A.; Howell, J.; Huber, Patrick; Hurh, P.; Huston, J.; Hylen, J.; Insler, J.; Jaffe, D.; James, C.; Johnson, C.; Johnson, M.; Johnson, R.; Johnson, W.; Johnston, W.; Johnstone, J.; Jones, B.; Jostlein, H.; Junk, T.; Junnarkar, S.; Kadel, R.; Kafka, T.; Kaminski, D.; Karagiorgi, Georgia S.; Karle, A.; Kaspar, J.; Katori, T.; Kayser, B.; Kearns, E.; Kettell, S. H.; Khanam, F.; Klein, J.; Kneller, J.; Koizumi, G.; Kopp, J.; Kopp, S.; Kropp, W.; Kudryavtsev, V. A.; Kumar, A.; Kumar, J.; Kutter, T.; Lackowski, T.; Lande, K.; Lane, C.; Lang, K.; Lanni, F.; Lanza, R.; Latorre, T.; Learned, J.; Lee, D.; Lee, K.; Li, Y.; Linden, S.; Ling, J.; Link, Jonathan M.; Littenberg, L.; Loiacono, L.; Liu, T.; Losecco, J.; Louis, W.; Lucas, P.; Lunardini, C.; Lundberg, B.; Lundin, T.; Makowiecki, D.; Malys, S.; Mandal, S.; Mann, A.; Mantsch, P.; Marciano, W. J.; Mariani, Camillo; Maricic, Jelena; Marino, A.; Marshak, M.; Maruyama, R.; Matthews, J.; Matsuno, S.; Mauger, C.; McCluskey, E.; McDonald, K.; McFarland, K. S.; McKeown, R.; McTaggart, R.; Mehdiyev, R.; Melnitchouk, W.; Meng, Y.; Mercurio, B.; Messier, M.; Metcalf, W.; Milincic, R.; Miller, W.; Mills, G.; Mishra, S.; MoedSher, S.; Mohapatra, D.; Mokhov, N.; Moore, C.; Morfin, J.; Morse, W.; Moss, A.; Mufson, S.; Musser, J.; Naples, D.; Napolitano, J.; Newcomer, M.; Norris, B.; Ouedraogo, S.; Page, B.; Pakvasa, S.; Paley, J.; Paolone, V.; Papadimitriou, V.; Parsa, Z.; Partyka, K.; Pavlovic, Z.; Pearson, C.; Perasso, S.; Petti, R.; Plunkett, R.; Polly, C. C.; Pordes, S.; Potenza, R.; Prakash, A.; Prokofiev, O.; Qian, X.; Raaf, J.; Radeka, V.; Raghavan, R.; Rameika, R.; Rebel, B.; Rescia, S.; Reitzner, D.; Richardson, M.; Riesselmann, K.; Robinson, M.; Rosen, M.; Rosenfeld, C.; Rucinski, R.; Russo, T.; Sahijpal, S.; Salon, S.; Samios, N.; Sanchez, Maria Cristina; Schmitt, R.; Schmitz, D.; Schneps, J.; Scholberg, K.; Seibert, S.; Sergiampietri, F.; Shaevitz, Marjorie Hansen; Shanahan, P.; Shaposhnikov, M.; Sharma, R.; Simos, N.; Singh, V.; Sinnis, G.; Sippach, W.; Skwarnicki, T.; Smy, M.; Sobel, H.; Soderberg, M.; Sondericker, J.; Sondheim, W.; Spitz, Joshua; Spooner, N.; Stancari, M.; Stancu, Ion; Stewart, J.; Stoler, P.; Stone, J.; Stone, S.; Strait, J.; Straszheim, T.; Striganov, S.; Sullivan, G.; Svoboda, R.; Szczerbinska, B.; Szelc, A.; Talaga, R.; Tanaka, H.; Tayloe, R.; Taylor, D.; Thomas, J.; Thompson, L.; Thomson, M.; Thorn, C.; Tian, X.; Toki, W.; Tolich, N.; Tripathi, M.; Trovato, M.; Tseung, H.; Tzanov, M.; Urheim, J.; Usman, S.; Vagins, M. R.; Berg, R. V.; Water, R. V. D.; Varner, G.; Vaziri, K.; Velev, G.; Viren, B.; Wachala, T.; Walter, C.; Wang, H.; Wang, Z.; Warner, D.; Webber, D.; Weber, A.; Wendell, R.; Wendt, C.; Wetstein, M.; White, H.; White, S.; Whitehead, L.; Willis, W.; Wilson, R. J.; Winslow, L.; Ye, J.; Yeh, M.; Yu, B.; Zeller, Geralyn P.; Zhang, C.; Zimmerman, E.; Zwaska, R. (2011-10-27)
In early 2010, the Long-Baseline Neutrino Experiment (LBNE) science collaboration initiated a study to investigate the physics potential of the experiment with a broad set of different beam, near- and far-detector configurations. Nine initial topics were identified as scientific areas that motivate construction of a long-baseline neutrino experiment with a very large far detector. We summarize the scientific justification for each topic and the estimated performance for a set of far detector reference configurations. We report also on a study of optimized beam parameters and the physics capability of proposed Near Detector configurations. This document was presented to the collaboration in fall 2010 and updated with minor modifications in early 2011.
The 750 GeV diphoton excess in unified SU(2)(L) x SU(2)(R) x SU(4) models from noncommutative geometry
Aydemir, U.; Minic, Djordje; Sun, C.; Takeuchi, Tatsu (World Scientific, 2016-06-14)
An analysis of nonoblique corrections to the Zb¯b vertex
Takeuchi, Tatsu; Grant, Aaron K.; Rosner, Jonathan L. (1994)
We present a model–independent analysis of the Zb¯b vertex, with the aim of constraining contributions of new physics to the left- and right–handed couplings of the b. We find that the left–handed coupling of the b is quite narrowly constrained by present data, but that the right–handed coupling is still largely unconstrained.
Analytical approximation of the neutrino oscillation matter effects at large theta (13)
Agarwalla, S. K.; Kao, Y.; Takeuchi, Tatsu (Springer, 2014-04-07)
Applied Antineutrino Physics 2015 -- Conference Summary
Bowden, N. S.; Heeger, K. M.; Huber, Patrick; Mariani, Camillo; Vogelaar, R. Bruce (2016-02)
This is a brief summary of the 11th Applied Antineutrino Physics 2015 workshop held at the Virginia Tech Arlington Research Facility from December 7-8, 2015.
Axionlike Particles at Future Neutrino Experiments: Closing the Cosmological Triangle
Brdar, Vedran; Dutta, Bhaskar; Jang, Wooyoung; Kim, Doojin; Shoemaker, Ian M.; Tabrizi, Zahra; Thompson, Adrian; Yu, Jaehoon (2021-05-17)
Axionlike particles (ALPs) provide a promising direction in the search for new physics, while a wide range of models incorporate ALPs. We point out that future neutrino experiments, such as DUNE, possess competitive sensitivity to ALP signals. The high-intensity proton beam impinging on a target can not only produce copious amounts of neutrinos, but also cascade photons that are created from charged particle showers stopping in the target. Therefore, ALPs interacting with photons can be produced (often energetically) with high intensity via the Primakoff effect and then leave their signatures at the near detector through the inverse Primakoff scattering or decays to a photon pair. Moreover, the high-capability near detectors allow for discrimination between ALP signals and potential backgrounds, improving the signal sensitivity further. We demonstrate that a DUNE-like detector can explore a wide range of parameter space in ALP-photon coupling g(a gamma) vs ALP mass m(a), including some regions unconstrained by existing bounds; the "cosmological triangle" will be fully explored and the sensitivity limits would reach up to m(a) similar to 3-4 GeV and down to g(a gamma) similar to 10(-8) GeV-1.
B-decay anomalies and scalar leptoquarks in unified Pati-Salam models from noncommutative geometry
Aydemir, Ufuk; Minic, Djordje; Sun, Chen; Takeuchi, Tatsu (Springer, 2018-09-19)
Motivated by possible scalar-leptoquark explanations of the recently reported B-decay anomalies, we investigate whether the required leptoquarks can be accommodated within models based on noncommutative geometry (NCG). The models considered have the gauge structure of Pati-Salam models, SU(4) x SU(2)(L) x SU(2)(R), with gauge coupling unification at a single scale. In one of the models, we find a unique scalar leptoquark with quantum numbers (3, 1, -1/3)(321), originating from a complex multiplet (6, 1, 1)(422), which can potentially explain the B-decay anomalies if its mass is on the order of a few TeV. The unification of couplings can be realized with the inclusion of a single step of intermediate symmetry breaking. The scalar leptoquark under consideration does not contribute to proton decay due to the absence of diquark couplings, as dictated by the underlying noncommutative geometry.
CHANDLER: A New Technology for Surface-level Reactor Neutrino Detection
Link, Jonathan M. (2016-12-16)
Motivation ‒ Why do we need better reactor neutrino detectors? Technological Foundations ‒ Where do these ideas come from? The CHANDLER Technology ‒ The basics idea Detector R&D ‒ What we have learned so far CHANDLER and SoLid ‒ A sterile neutrino search
Characterization of the spontaneous light emission of the PMTs used in the Double Chooz experiment
Abe, Y.; Abrahao, T.; Almazan, H.; Alt, C.; Appel, S.; Baussan, E.; Bekman, I.; Bergevin, M.; Bezerra, T. J. C.; Bezrukhov, Leonid B.; Blucher, E.; Brugiere, T.; Buck, C.; Busenitz, J.; Cabrera, A.; Calvo, E.; Camilleri, Leslie; Carr, Rachel E.; Cerrada, M.; Chauveau, E.; Chimenti, P.; Collin, A. P.; Conover, E.; Conrad, Janet M.; Crespo-Anadon, J. I.; Crum, K.; Cucoanes, A. S.; Damon, E.; Dawson, J. V.; de Kerret, H.; Dhooghe, J.; Dietrich, D.; Djurcic, Zelimir; dos Anjos, J. C.; Dracos, M.; Etenko, A.; Fallot, M.; Felde, J.; Fernandes, S. M.; Fischer, V.; Franco, D.; Franke, M.; Furuta, H.; Gil-Botella, I.; Giot, L.; Goger-Neff, M.; Gomez, H.; Gonzalez, L. F. G.; Goodenough, L.; Goodman, M. C.; Haag, N.; Hara, T.; Haser, J.; Hellwig, D.; Hofmann, M.; Horton-Smith, Glenn A.; Hourlier, A.; Ishitsuka, M.; Jiménez, S.; Jochum, J.; Jollet, C.; Kaether, F.; Kalousis, L. N.; Kamyshkov, Y.; Kaneda, M.; Kaplan, D. M.; Kawasaki, T.; Kemp, E.; Kryn, D.; Kuze, M.; Lachenmaier, Tobias; Lane, C. E.; Lasserre, T.; Letourneau, A.; Lhuillier, D.; Lima, H. P.; Lindner, M.; Lopez-Castano, J. M.; LoSecco, J. M.; Lubsandorzhiev, B. K.; Lucht, S.; Maeda, J.; Mariani, Camillo; Maricic, Jelena; Martino, J.; Matsubara, T.; Mention, G.; Meregaglia, A.; Miletic, T.; Milincic, R.; Minotti, A.; Nagasaka, Y.; Navas-Nicolás, D.; Novella, P.; Nunokawa, H.; Oberauer, L.; Obolensky, M.; Onillon, A.; Osborn, A.; Palomares, C.; Pepe, I. M.; Perasso, S.; Porta, A.; Pronost, G.; Reichenbacher, J.; Reinhold, B.; Roehling, M.; Roncin, R.; Rybolt, B.; Sakamoto, Y.; Santorelli, R.; Schilithz, A. C.; Schoenert, S.; Schoppmann, S.; Shaevitz, Marjorie Hansen; Sharankova, R.; Shrestha, D.; Sibille, V.; Sinev, V.; Skorokhvatov, Mikhail D.; Smith, E.; Soiron, M.; Spitz, Joshua; Stahl, A.; Stancu, Ion; Stokes, Lee F. F.; Strait, M.; Suekane, F.; Sukhotin, S.; Sumiyoshi, T.; Sun, Y.; Svoboda, R.; Terao, K.; Tonazzo, A.; Thi, H. H. T.; Valdiviesso, G. A.; Vassilopoulos, N.; Verdugo, A.; Veyssiere, C.; Vivier, M.; von Feilitzsch, F.; Wagner, S.; Walsh, N.; Watanabe, H.; Wiebusch, C.; Wurm, M.; Yang, G.; Yermia, F.; Zimmer, V. (IOP, 2016-08-01)
Combining dark matter detectors and electron-capture sources to hunt for new physics in the neutrino sector
Coloma, Pilar; Huber, Patrick; Link, Jonathan M. (Springer, 2014-11-10)
In this letter we point out the possibility to study new physics in the neutrino sector using dark matter detectors based on liquid xenon. These are characterized by very good spatial resolution and extremely low thresholds for electron recoil energies. When combined with a radioactive nu e source, both features in combination allow for a very competitive sensitivity to neutrino magnetic moments and sterile neutrino oscillations. We find that, for realistic values of detector size and source strength, the bound on the neutrino magnetic moment can be improved by an order of magnitude with respect to the present value. Regarding sterile neutrino searches, we find that most of the gallium anomaly could be explored at the 95% confidence level just using shape information.
Comparison of nu(mu)-Ar multiplicity distributions observed by MicroBooNE to GENIE model predictions: MicroBooNE Collaboration
Adams, C.; An, R.; Anthony, J.; Asaadi, J.; Auger, M.; Balasubramanian, S.; Baller, B.; Barnes, C.; Barr, G.; Bass, M.; Bay, F.; Bhat, A.; Bhattacharya, K.; Bishai, M.; Blake, A.; Bolton, T.; Camilleri, Leslie; Caratelli, D.; Castillo Fernandez, R.; Cavanna, F.; Cerati, G.; Chen, H.; Chen, Y.; Church, E.; Cianci, D.; Cohen, E.; Collin, G. H.; Conrad, Janet M.; Convery, M.; Cooper-Troendle, L.; Crespo-Anadon, J. I.; Del Tutto, M.; Devitt, D.; Diaz, A.; Dytman, S.; Eberly, B.; Ereditato, A.; Escudero Sanchez, L.; Esquivel, J.; Evans, J. J.; Fadeeva, A. A.; Fleming, B. T.; Foreman, W.; Furmanski, A. P.; Garcia-Gamez, D.; Garvey, G. T.; Genty, V.; Goeldi, D.; Golapinni, S.; Gramellini, E.; Greenlee, H.; Grosso, R.; Guenette, R.; Guzowski, P.; Hackenburg, A.; Hamilton, P.; Hen, O.; Hewes, J.; Hill, C.; Ho, J.; Horton-Smith, Glenn A.; Hourlier, A.; Huang, E-C; James, C.; Jan de Vries, J.; Jiang, L.; Johnson, R. A.; Joshi, J.; Jostlein, H.; Jwa, Y-J; Kaleko, D.; Karagiorgi, Georgia S.; Ketchum, W.; Kirby, B.; Kirby, M.; Kobilarcik, T.; Kreslo, I.; Li, Y.; Lister, A.; Littlejohn, B. R.; Lockwitz, S.; Lorca, D.; Louis, W. C.; Luethi, M.; Lundberg, B.; Luo, X.; Marchionni, A.; Marcocci, S.; Mariani, Camillo; Marshall, J.; Martinez Caicedo, D. A.; Mastbaum, A.; Meddage, V.; Mettler, T.; Miceli, T.; Mills, G. B.; Mogan, A.; Moon, J.; Mooney, M.; Moore, C. D.; Mousseau, J.; Murphy, M.; Murrells, R.; Naples, D.; Nienaber, P.; Nowak, J.; Palamara, O.; Pandey, V.; Paolone, V.; Papadopoulou, A.; Papavassiliou, V.; Pate, S. F.; Pavlovic, Z.; Piasetzky, E.; Porzio, D.; Pulliam, G.; Qian, X.; Raaf, J. L.; Rafique, A.; Rochester, L.; Ross-Lonergan, M.; von Rohr, C. Rudolph; Russell, B.; Schmitz, D. W.; Schukraft, A.; Seligman, W.; Shaevitz, Marjorie Hansen; Sinclair, J.; Smith, A.; Snider, E. L.; Soderberg, M.; Söldner-Rembold, S.; Soleti, S. R.; Spentzouris, P.; Spitz, Joshua; St John, J.; Strauss, T.; Sutton, K.; Sword-Fehlberg, S.; Szelc, A. M.; Tagg, N.; Tang, W.; Terao, K.; Thomson, M.; Toups, M.; Tsai, Y. T.; Tufanli, S.; Usher, T.; Van De Pontseele, W.; Van de Water, R. G.; Viren, B.; Weber, M.; Wei, H.; Wickremasinghe, D. A.; Wierman, K.; Williams, Z.; Wolbers, S.; Wongjirad, T.; Woodruff, K.; Yang, T.; Yarbrough, G.; Yates, L. E.; Zeller, Geralyn P.; Zennamo, J.; Zhang, C. (2019-03-18)
We measure a large set of observables in inclusive charged current muon neutrino scattering on argon with the MicroBooNE liquid argon time projection chamber operating at Fermilab. We evaluate three neutrino interaction models based on the widely used GENIE event generator using these observables. The measurement uses a data set consisting of neutrino interactions with a final state muon candidate fully contained within the MicroBooNE detector. These data were collected in 2016 with the Fermilab Booster Neutrino Beam, which has an average neutrino energy of MeV, using an exposure corresponding to 5.0x1019 protons-on-target. The analysis employs fully automatic event selection and charged particle track reconstruction and uses a data-driven technique to separate neutrino interactions from cosmic ray background events. We find that GENIE models consistently describe the shapes of a large number of kinematic distributions for fixed observed multiplicity.
Comparison of the calorimetric and kinematic methods of neutrino energy reconstruction in disappearance experiments
Ankowski, Artur M.; Benhar, Omar; Coloma, Pilar; Huber, Patrick; Jen, C. M.; Mariani, Camillo; Meloni, David; Vagnoni, E. (American Physical Society, 2015-10-22)
To be able to achieve their physics goals, future neutrino-oscillation experiments will need to reconstruct the neutrino energy with very high accuracy. In this work, we analyze how the energy reconstruction may be affected by realistic detection capabilities, such as energy resolutions, efficiencies, and thresholds. This allows us to estimate how well the detector performance needs to be determined a priori in order to avoid a sizable bias in the measurement of the relevant oscillation parameters. We compare the kinematic and calorimetric methods of energy reconstruction in the context of two ν_μ &8594; ν_μ disappearance experiments operating in different energy regimes. For the calorimetric reconstruction method, we find that the detector performance has to be estimated with an Ο(10%) accuracy to avoid a significant bias in the extracted oscillation parameters. On the other hand, in the case of kinematic energy reconstruction, we observe that the results exhibit less sensitivity to an overestimation of the detector capabilities.
Constraining new physics with vertex corrections
Takeuchi, Tatsu; Lebedev, O.; Loinaz, William (1999)
Constraining non-standard interactions of the neutrino with Borexino
Agarwalla, S. K.; Lombardi, Francesco; Takeuchi, Tatsu (Springer, 2012-12-01)
We use the Borexino 153.6 ton·year data to place constraints on non-standard neutrino-electron interactions, taking into account the uncertainties in the 7Be solar neutrino flux and the mixing angle θ 23, and backgrounds due to 85Kr and 210Bi β-decay. We find that the bounds are comparable to existing bounds from all other experiments. Further improvement can be expected in Phase II of Borexino due to the reduction in the 85Kr background.
Constraining visible neutrino decay at KamLAND and JUNO
Porto-Silva, Yago P.; Prakash, Suprabh; Peres, O. L. G.; Nunokawa, Hiroshi; Minakata, Hisakazu (2020-10-29)
We study visible neutrino decay at the reactor neutrino experiments KamLAND and, JUNO. Assuming the Majoron model of neutrino decay, we obtain constraints on the couplings between Majoron and neutrino as well as on the lifetime/mass of the most massive neutrino state i.e., tau(3)/m(3) or tau(2)/m(2), respectively, for the normal or the inverted mass orderings. We obtain the constraints on the lifetime tau(2)/m(2)>= 1.4x10(-9) s/eV in the inverted mass ordering for both KamLAND and JUNO at 90% CL. In the normal ordering in which the bound can be obtained for JUNO only, the constraint is milder than the inverted ordering case, tau(3)/m(3) >= 1.0 x 10(-1)0 s/eV at 90% CL. We find that the dependence of lightest neutrino mass (= m(lightest)), m(1)(m(3)) for the normal (inverted) mass ordering, on the constraints for the different types of couplings (scalar or pseudo-scalar) is rather strong, but the m(lightest) dependence on the lifetime/mass bound is only modest.
Constraints on R-parity violation from recent Belle/Babar data
Kao, Y.; Takeuchi, Tatsu (2009)
Convolutional neural networks applied to neutrino events in a liquid argon time projection chamber
Acciarri, R.; Adams, C.; An, R.; Asaadi, J.; Auger, M.; Bagby, L.; Baller, B.; Barr, G.; Bass, M.; Bay, F.; Bishai, M.; Blake, A.; Bolton, T.; Bugel, L.; Camilleri, Leslie; Caratelli, D.; Carls, B.; Fernandez, R. C.; Cavanna, F.; Chen, H.; Church, E.; Cianci, D.; Collin, G. H.; Conrad, Janet M.; Convery, M.; Crespo-Anadon, J. I.; Del Tutto, M.; Devitt, D.; Dytman, S.; Eberly, B.; Ereditato, A.; Escudero Sanchez, L.; Esquivel, J.; Fleming, B. T.; Foreman, W.; Furmanski, A. P.; Garvey, G. T.; Genty, V.; Goeldi, D.; Golapinni, S.; Graf, N.; Gramellini, E.; Greenlee, H.; Grosso, R.; Guenette, R.; Hackenburg, A.; Hamilton, P.; Hen, O.; Hewes, J.; Hill, C.; Ho, J.; Horton-Smith, Glenn A.; James, C.; de Vries, J. J.; Jen, C. M.; Jiang, L.; Johnson, R. A.; Jones, B. J. P.; Joshi, J.; Jostlein, H.; Kaleko, D.; Karagiorgi, Georgia S.; Ketchum, W.; Kirby, B.; Kirby, M.; Kobilarcik, T.; Kreslo, I.; Laube, A.; Li, Y.; Lister, A.; Littlejohn, B. R.; Lockwitz, S.; Lorca, D.; Louis, W. C.; Luethi, M.; Lundberg, B.; Luo, X.; Marchionni, A.; Mariani, Camillo; Marshall, J.; Caicedo, D. A. M.; Meddage, V.; Miceli, T.; Mills, G. B.; Moon, J.; Mooney, M.; Moore, C. D.; Mousseau, J.; Murrells, R.; Naples, D.; Nienaber, P.; Nowak, J.; Palamara, O.; Paolone, V.; Papavassiliou, V.; Pate, S. F.; Pavlovic, Z.; Porzio, D.; Pulliam, G.; Qian, X.; Raaf, J. L.; Rafique, A.; Rochester, L.; von Rohr, C. R.; Russell, B.; Schmitz, D. W.; Schukraft, A.; Seligman, W.; Shaevitz, Marjorie Hansen; Sinclair, J.; Snider, E. L.; Soderberg, M.; Söldner-Rembold, S.; Soleti, S. R.; Spentzouris, P.; Spitz, Joshua; St John, J.; Strauss, T.; Szelc, A. M.; Tagg, N.; Terao, K.; Thomson, M.; Toups, M.; Tsai, Y. T.; Tufanli, S.; Usher, T.; de Water, R. G. V.; Viren, B.; Weber, M.; Weston, J.; Wickremasinghe, D. A.; Wolbers, S.; Wongjirad, T.; Woodruff, K.; Yang, T.; Zeller, Geralyn P.; Zennamo, J.; Zhang, C. (IOP, 2017-03-01)
We present several studies of convolutional neural networks applied to data coming from the MicroBooNE detector, a liquid argon time projection chamber (LArTPC). The algorithms studied include the classification of single particle images, the localization of single particle and neutrino interactions in an image, and the detection of a simulated neutrino event overlaid with cosmic ray backgrounds taken from real detector data. These studies demonstrate the potential of convolutional neural networks for particle identification or event detection on simulated neutrino interactions. We also address technical issues that arise when applying this technique to data from a large LArTPC at or near ground level.
CP-Violating Neutrino Nonstandard Interactions in Long-Baseline-Accelerator Data
Denton, Peter B.; Gehrlein, Julia; Pestes, Rebekah (2021-02-04)
Neutrino oscillations in matter provide a unique probe of new physics. Leveraging the advent of neutrino appearance data from NOvA and T2K in recent years, we investigate the presence of CP-violating neutrino nonstandard interactions in the oscillation data. We first show how to very simply approximate the expected NSI parameters to resolve differences between two long-baseline appearance experiments analytically. Then, by combining recent NOvA and T2K data, we find a tantalizing hint of CP-violating NSI preferring a new complex phase that is close to maximal: phi(e mu) or phi(e tau) approximate to 3 pi/2 with vertical bar epsilon(e mu vertical bar) or vertical bar epsilon(e tau)vertical bar similar to 0.2. We then compare the results from long-baseline data to constraints from IceCube and COHERENT.
Dalitz plot analysis of the D+ -> K-pi(+)pi(+) decay in the FOCUS experiment
Link, Jonathan M.; Yager, P. M.; Anjos, J. C.; Bediaga, I.; Castromonte, C.; Machado, A. A.; Magnin, J.; Massafferri, A.; de Miranda, J. M.; Pepe, I. M.; Polycarpo, E.; dos Reis, A. C.; Carrillo, S.; Casimiro, E.; Cuautle, E.; Sánchez-Hernández, A.; Uribe, C.; Vázquez, F.; Agostino, L.; Cinquini, L.; Cumalat, J. P.; Frisullo, V.; O'Reilly, B.; Segoni, I.; Stenson, K.; Butler, J. N.; Cheung, H. W. K.; Chiodini, G.; Gaines, I.; Garbincius, P. H.; Garren, L. A.; Gottschalk, E.; Kasper, P. H.; Kreymer, A. E.; Kutschke, R.; Wang, M.; Benussi, L.; Bianco, S.; Fabbri, F. L.; Zallo, A.; Reyes, M.; Cawlfield, C.; Kim, D. Y.; Rahimi, A.; Wiss, J.; Gardner, R.; Kryemadhi, A.; Chung, Y. S.; Kang, J. S.; Ko, B. R.; Kwak, J. W.; Lee, K. B.; Cho, K.; Park, H.; Alimonti, G.; Barberis, S.; Boschini, M.; Cerutti, A.; D'Angelo, P.; DiCorato, M.; Dini, P.; Edera, L.; Erba, S.; Inzani, P.; Leveraro, E.; Malvezzi, S.; Menasce, D.; Mezzadri, M.; Moroni, L.; Pedrini, D.; Pontoglio, C.; Prelz, F.; Rovere, M.; Sala, S.; Davenport, T. F. III; Arena, V.; Boca, G.; Bonomi, G.; Gianini, G.; Liguori, G.; Pegna, D. L.; Merlo, M. M.; Pantea, D.; Ratti, S. P.; Riccardi, C.; Vitulo, P.; Goebel, C.; Otalora, J.; Hemandez, H.; Lopez, A. M.; Mendez, H.; Paris, A.; Quinones, J.; Ramirez, J. E.; Zhang, Y.; Wilson, J. R.; Handler, T.; Mitchell, R.; Engh, D.; Hosack, M.; Johns, W. E.; Luiggi, E.; Nehring, M.; Sheldon, P. D.; Vaandering, E. W.; Webster, M.; Sheaff, M.; Pennington, M. R. (2007-09-13)
Using data collected by the high energy photoproduction experiment FOCUS at Fermilab we performed a Dalitz plot analysis of the Cabibbo favored decay D+ ! K−π+π+. This study uses 53653 Dalitz-plot events with a signal fraction of 97%, and represents the highest statistics, most complete Dalitz plot analysis for this channel. Results are presented and discussed using two different formalisms. The first is a simple sum of Breit–Wigner functions with freely fitted masses and widths. It is the model traditionally adopted and serves as comparison with the already published analyses. The second uses a K-matrix approach for the dominant S-wave, in which the parameters are fixed by first fitting Kπ scattering data and continued to threshold by Chiral Perturbation Theory. We show that the Dalitz plot distribution for this decay is consistent with the assumption of two body dominance of the final state interactions and the description of these interactions is in agreement with other data on the Kπ final state.
Dark matter-neutrino interconversion at COHERENT, direct detection, and the early Universe
Hurtado, Nicholas; Mir, Hana; Shoemaker, Ian M.; Welch, Eli; Wyenberg, Jason (2020-07-14)
We study a dark matter (DM) model in which the dominant coupling to the standard model occurs through a neutrino-DM-scalar coupling. The new singlet scalar will generically have couplings to nuclei/electrons arising from renormalizable Higgs portal interactions. As a result, the DM particle X can convert into a neutrino via scattering on a target nucleus N: X + N -> nu + N, leading to striking signatures at direct detection experiments. Similarly, DM can be produced in neutrino scattering events at neutrino experiments: nu + N -> X + N, predicting spectral distortions at experiments such as COHERENT. Furthermore, the model allows for late kinetic decoupling of dark matter with implications for small-scale structure. At low masses, we find that COHERENT and late kinetic decoupling produce the strongest constraints on the model, while at high masses the leading constraints come from DM down-scattering at XENON1T and Borexino. Future improvement will come from CavNS data, ultralow threshold direct detection, and rare kaon decays.

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