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Test of Light-Lepton Universality in the Rates of Inclusive Semileptonic B-Meson Decays at Belle IIopen access

Authors
Aggarwal, L.Ahmed, H.Aihara, H.Akopov, N.Aloisio, A.Ky, N. AnhAsner, D. M.Atmacan, H.Aushev, T.Aushev, V.Bae, H.Bahinipati, S.Bambade, P.Banerjee, Sw.Bansal, S.Barrett, M.Baudot, J.Bauer, M.Baur, A.Beaubien, A.Becker, J.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.Bodrov, D.Borah, J.Bozek, A.Bracko, M.Briere, R. A.Browder, T. E.Budano, A.Bussino, S.Campajola, M.Cao, L.Casarosa, G.Cecchi, C.Cerasoli, J.Chang, M. -C.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.Cochran, J.Corona, L.Cunliffe, 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.Dhamija, R.Di Capua, F.Dingfelder, J.Dolezal, Z.Dong, T. V.Dorigo, M.Dossett, D.Dreyer, S.Dubey, S.Dujany, G.Ecker, P.Eliachevitch, M.Feichtinger, P.Ferber, T.Ferlewicz, D.Fillinger, T.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.Giordano, R.Giri, A.Glazov, A.Gobbo, B.Godang, R.Goldenzweig, P.Gradl, W.Grammatico, T.Granderath, S.Graziani, E.Gruberova, Z.Gu, T.Gudkova, K.Halder, S.Hara, T.Hayasaka, K.Hayashii, H.Hazra, S.Hearty, C.Hedges, M. T.de la Cruz, I. HerediaVillanueva, M. HernandezHershenhorn, A.Higuchi, T.Hill, E. C.Hohmann, M.Hsu, C. -L.Iijima, T.Inami, K.Inguglia, G.Ipsita, N.Ishikawa, A.Ito, S.Itoh, R.Iwasaki, M.Jacobs, W. W.Jang, E. -J.Ji, Q. P.Jia, S.Jin, Y.Junkerkalefeld, H.Kaleta, M.Kaliyar, A. B.Karyan, G.Kawasaki, T.Kiesling, C.Kim, C. -H.Kim, D. Y.Kim, K. -H.Kim, Y. -K.Kindo, H.Kinoshita, K.Kodys, P.Kohani, S.Kojima, K.Korobov, A.Korpar, S.Kovalenko, E.Kowalewski, R.Krizan, P.Krokovny, P.Kumar, J.Kumar, R.Kumara, K.Kuzmin, A.Kwon, Y. -J.Lacaprara, S.Lange, J. S.Laurenza, M.Leboucher, R.Le Diberder, F. R.Levit, D.Lewis, P. M.Li, L. K.Libby, J.Liptak, Z.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.Manfredi, R.Manoni, E.Manthei, A. C.Mantovano, M.Marinas, C.Martel, L.Martellini, C.Martini, A.Massaccesi, L.Masuda, M.Matsuoka, K.Matvienko, D.Maurya, S. K.McKenna, J. A.Meier, F.Merola, M.Metzner, F.Milesi, M.Miller, C.Miyabayashi, K.Mizuk, R.Mohanty, G. B.Moneta, S.Mrvar, M.Mussa, R.Nakamura, I.Nakamura, K. R.Nakao, M.Nakazawa, Y.Charan, A. NarimaniNaruki, M.Narwal, D.Natochii, A.Nayak, L.Nazaryan, G.Nisar, N. K.Nishida, S.Ono, H.Onuki, Y.Oskin, P.Pakhlov, P.Pakhlova, G.Paladino, A.Panta, A.Pardi, S.Park, H.Park, J.Paschen, B.Passeri, A.Patra, S.Paul, S.Pedlar, T. K.Peruzzi, I.Peschke, R.Pestotnik, R.Piilonen, L. E.Angioni, G. PinnaPodesta-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.Reif, M.Reiter, S.Ripp-Baudot, I.Rizzo, G.Rizzuto, L. B.Rocchetti, P.Roney, J. M.Rostomyan, A.Rout, N.Sanders, D. A.Sandilya, S.Sangal, A.Santelj, L.Sato, Y.Scavino, B.Schwanda, C.Seino, Y.Selce, A.Senyo, K.Sevior, M. E.Sfienti, C.Shan, W.Sharma, C.Shen, C. P.Shillington, T.Shiu, J. -G.Simon, F.Singh, J. B.Skorupa, J.Sobie, R. J.Soffer, A.Sokolov, A.Solovieva, E.Spataro, S.Spruck, B.Staric, M.Stefkova, S.Stroili, R.Sue, Y.Sumihama, M.Sutcliffe, W.Suzuki, S. Y.Svidras, H.Takizawa, M.Tamponi, U.Tanida, K.Taniguchi, N.Tenchini, F.Tiwary, R.Tonelli, D.Torassa, E.Trabelsi, K.Tsaklidis, I.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.Vinokurova, A.Vismaya, V. S.Vitale, L.Vossen, A.Wallner, S.Wang, E.Wang, M. -Z.Wang, X. L.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.Ye, H.Yin, J. H.Yook, Y. M.Yoshihara, K.Zhai, Y.Zhang, Y.Zhilich, V.Zhou, Q. D.Zhou, X. Y.Zhukova, V. I.Zlebcik, R.Belle II Collaboration
Issue Date
Aug-2023
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.131, no.5
Journal Title
PHYSICAL REVIEW LETTERS
Volume
131
Number
5
URI
https://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/49507
DOI
10.1103/PhysRevLett.131.051804
ISSN
0031-9007
1079-7114
Abstract
We present the first measurement of the ratio of branching fractions of inclusive semileptonic B-meson decays, R(X-e/mu) = B(B -> Xe nu)/B(B -> X mu nu), a precision test of electron-muon universality, using data corresponding to 189 fb(-1) from electron-positron collisions collected with the Belle II detector. In events where the partner B meson is fully reconstructed, we use fits to the lepton momentum spectra above 1.3 GeV/c to obtain R(X-e/mu) = 1.007 +/- 0.009(stat) +/- 0.019(syst), which is the most precise lepton-universality test of its kind and agrees with the standard-model expectation.
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