Hirata, H.Iijima, T.Kato, Y.Tanida, K.Adachi, I.Ahn, J. K.Aihara, H.Al Said, S.Asner, D. M.Atmacan, H.Aushev, T.Ayad, R.Babu, V.Banerjee, SwBehera, P.Belous, K.Bennett, J.Bessner, M.Bhardwaj, V.Bhuyan, B.Bilka, T.Biswas, D.Bobrov, A.Bodrov, D.Borah, J.Bozek, A.Bracko, M.Branchini, P.Browder, T. E.Budano, A.Campajola, M.Cervenkov, D.Chang, M. -C.Chang, P.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.Dolezal, Z.Dong, T.Epifanov, D.Ferber, T.Ferlewicz, D.Fulsom, B. G.Gaur, V.Garmash, A.Giri, A.Goldenzweig, P.Graziani, E.Gudkova, K.Hadjivasiliou, C.Halder, S.Hara, T.Hayasaka, K.Hayashii, H.Hedges, M. T.Herrmann, D.Hou, W. -S.Hsu, C. -L.Inami, K.Ipsita, N.Ishikawa, A.Itoh, R.Iwasaki, M.Jacobs, W. W.Jang, E. -J.Jia, S.Jin, Y.Kalita, D.Kiesling, C.Kim, C. H.Kim, D. Y.Kim, K. -H.Kim, Y. -K.Kinoshita, K.Kodys, P.Konno, T.Korobov, A.Korpar, S.Kovalenko, E.Krizan, P.Krokovny, P.Kuhr, T.Kumar, R.Kumara, K.Kuzmin, A.Kwon, Y. -J.Lam, T.Lange, J. S.Laurenza, M.Lautenbach, K.Lee, S. C.Li, L. K.Li, Y.Libby, J.Lieret, K.Lin, Y.-rr 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.Mohanty, G. B.Mrvar, M.Mussa, R.Nakamura, I.Nakao, M.Natkaniec, Z.Natochii, A.Nayak, L.Nayak, M.Niiyama, 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.Patra, S.Paul, S.Pedlar, T. K.Pestotnik, R.Piilonen, L. E.Podobnik, T.Prencipe, E.Prim, M. T.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.Sokolov, A.Solovieva, E.Staric, M.Stottler, Z. S.Sumihama, M.Sutcliffe, W.Takizawa, M.Tamponi, U.Tanaka, S.Tenchini, F.Tiwary, R.Trabelsi, K.Uchida, M.Uglov, T.Unno, Y.Uno, K.Uno, S.Urquijo, P.Usov, Y.Vahsen, S. E.Varner, G.Vinokurova, A.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.Yelton, J.Yin, J. H.Yook, Y.Yuan, C. Z.Yuan, L.Yusa, Y.Zhang, Z. P.Zhilich, V.2023-12-082023-12-082023-06-282023-06-282470-0010https://hdl.handle.net/10919/117138We present a study of the X(3872) lineshape in the decay B→X(3872)K→D0D¯∗0K using a data sample of 772×106 BB¯ pairs collected at the γ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The peak near the threshold in the D0D¯∗0 invariant mass spectrum is fitted using a relativistic Breit-Wigner lineshape. We determine the mass and width parameters to be mBW=3873.71-0.50+0.56(stat)±0.13(syst) MeV/c2 and ΓBW=5.2-1.5+2.2(stat)±0.4(syst) MeV, respectively. The branching fraction is found to be B(B+→X(3872)K+)×B(X(3872)→D0D¯∗0)=(0.97-0.18+0.21(stat)±0.10(syst))×10-4. The signal from B0 decays is observed for the first time with 5.2σ significance, and the ratio of branching fractions between charged and neutral B decays is measured to be B(B0→X(3872)K0)/B(B+→X(3872)K+)=1.34-0.40+0.47(stat)-0.12+0.10(syst). The peak is also studied using a Flatté lineshape. We determine the lower limit on the DD¯∗ coupling constant g to be 0.075 at 95% credibility in the parameter region where the ratio of g to the mass difference from the D0D¯∗0 threshold is equal to -15.11 GeV-1, as measured by LHCb.14 page(s)In CopyrightScience & TechnologyPhysical SciencesAstronomy & AstrophysicsPhysics, Particles & FieldsPhysicsBELLESEARCH5106 Nuclear and Plasma Physics5107 Particle and High Energy Physics4902 Mathematical Physics49 Mathematical Sciences51 Physical SciencesArticle - Refereedhttps://doi.org/10.1103/PhysRevD.107.11201110711Piilonen, Leo [0000-0001-6836-0748]2470-0029