학술논문
First Measurement of R(X_{τ/ℓ}) as an Inclusive Test of the b→cτν Anomaly.
Document Type
Academic Journal
Author
Adachi I; Adamczyk K; Aggarwal L; Ahmed H; Aihara H; Akopov N; Aloisio A; Asner DM; Atmacan H; Aushev T; Aushev V; Aversano M; Babu V; Bahinipati S; Bambade P; Banerjee S; Bansal S; Barrett M; Baudot J; Baur A; Beaubien A; Becherer F; Becker J; Bennett JV; Bernlochner FU; Bertacchi V; Bertemes M; Bertholet E; Bessner M; Bettarini S; Bhuyan B; Bianchi F; Bilka T; Bilokin S; Biswas D; Bobrov A; Bodrov D; Bolz A; Bondar A; Bozek A; Bračko M; Branchini P; Briere RA; Browder TE; Budano A; Bussino S; Campajola M; Cao L; Casarosa G; Cecchi C; Cerasoli J; Chang MC; Chang P; Cheema P; Cheon BG; Chilikin K; Chirapatpimol K; Cho HE; Cho K; Cho SJ; Choi SK; Choudhury S; Corona L; Cremaldi LM; Dattola F; De La Cruz-Burelo E; De La Motte SA; de Marino G; De Nardo G; De Nuccio M; De Pietro G; de Sangro R; Destefanis M; Dhamija R; Di Canto A; Di Capua F; Dingfelder J; Doležal Z; Dong TV; Dorigo M; Dort K; Dreyer S; Dubey S; Dujany G; Ecker P; Eliachevitch M; Epifanov D; Feichtinger P; Ferber T; Ferlewicz D; Fillinger T; Finocchiaro G; Fodor A; Forti F; Frey A; Fulsom BG; Ganiev E; Garcia-Hernandez M; Garg R; Gaudino G; Gaur V; Gaz A; Gellrich A; Ghevondyan G; Ghosh D; Ghumaryan H; Giakoustidis G; Giordano R; Giri A; Gobbo B; Godang R; Gogota O; Goldenzweig P; Gradl W; Grammatico T; Granderath S; Graziani E; Greenwald D; Gruberová Z; Gu T; Gudkova K; Halder S; Han Y; Hara T; Hayashii H; Hazra S; Hearty C; Hedges MT; Heidelbach A; Heredia de la Cruz I; Hernández Villanueva M; Higuchi T; Hoek M; Hohmann M; Horak P; Hsu CL; Humair T; Iijima T; Ipsita N; Ishikawa A; Itoh R; Iwasaki M; Jackson P; Jacobs WW; Jaffe DE; Jang EJ; Jia S; Jin Y; Joo KK; Junkerkalefeld H; Kalita D; Kaliyar AB; Kandra J; Kang KH; Karyan G; Kawasaki T; Keil F; Kiesling C; Kim CH; Kim DY; Kim KH; Kim YK; Kinoshita K; Kodyš P; Koga T; Kohani S; Kojima K; Korobov A; Korpar S; Kovalenko E; Kowalewski R; Kraetzschmar TMG; Križan P; Krokovny P; Kuhr T; Kulii Y; Kumar M; Kumara K; Kunigo T; Kuzmin A; Kwon YJ; Lacaprara S; Lam T; Lanceri L; Lange JS; Laurenza M; Leboucher R; Le Diberder FR; Lee MJ; Levit D; Lewis PM; Li LK; Li Y; Li YB; Libby J; Liu M; Liu QY; Liu ZQ; Liventsev D; Longo S; Lueck T; Luo T; Lyu C; Ma Y; Maggiora M; Maharana SP; Maiti R; Maity S; Mancinelli G; Manfredi R; Manoni E; Manthei AC; Mantovano M; Marcantonio D; Marcello S; Marinas C; Martel L; Martellini C; Martinov T; Massaccesi L; Masuda M; Matsuda T; Matsuoka K; Matvienko D; Maurya SK; McKenna JA; Mehta R; Meier F; Merola M; Metzner F; Milesi M; Miller C; Mirra M; Miyabayashi K; Miyake H; Mizuk R; Mohanty GB; Molina-Gonzalez N; Mondal S; Moneta S; Moser HG; Mrvar M; Mussa R; Nakamura I; Nakao M; Nakazawa Y; Narimani Charan A; Naruki M; Narwal D; Natkaniec Z; Natochii A; Nayak L; Nayak M; Nazaryan G; Niebuhr C; Nishida S; Ogawa S; Ono H; Onuki Y; Oskin P; Otani F; Pakhlov P; Pakhlova G; Panta A; Pardi S; Park H; Park SH; Paschen B; Passeri A; Patra S; Paul S; Pedlar TK; Peschke R; Pestotnik R; Piccolo M; Piilonen LE; Podesta-Lerma PLM; Podobnik T; Pokharel S; Praz C; Prell S; Prencipe E; Prim MT; Purwar H; Rados P; Raeuber G; Raiz S; Rauls N; Reif M; Reiter S; Ripp-Baudot I; Rizzo G; Robertson SH; Rocchetti P; Roehrken M; Roney JM; Rostomyan A; Rout N; Russo G; Sakai Y; Sanders DA; Sandilya S; Santelj L; Sato Y; Savinov V; Scavino B; Schmitt C; Schwanda C; Seino Y; Selce A; Senyo K; Serrano J; Sevior ME; Sfienti C; Shan W; Shen CP; Shi XD; Shillington T; Shimasaki T; Shiu JG; Shtol D; Sibidanov A; Simon F; Singh JB; Skorupa J; Sobie RJ; Sobotzik M; Soffer A; Sokolov A; Solovieva E; Spataro S; Spruck B; Starič M; Stavroulakis P; Stefkova S; Stroili R; Sumihama M; Sumisawa K; Svidras H; Takizawa M; Tamponi U; Tanaka S; Tanida K; Tenchini F; Tittel O; Tiwary R; Tonelli D; Torassa E; 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 SE; van Tonder R; Varvell KE; Veronesi M; Vinokurova A; Vismaya VS; Vitale L; Volpe R; Wach B; Wakai M; Wallner S; Wang MZ; Wang XL; Wang Z; Warburton A; Watanuki S; Wessel C; Won E; Xu XP; Yabsley BD; Yamada S; Yang SB; Yelton J; Yin JH; Yoshihara K; Yuan CZ; Zhang B; Zhang Y; Zhilich V; Zhou QD; Zhou XY; Zhukova VI
Source
Publisher: American Physical Society Country of Publication: United States NLM ID: 0401141 Publication Model: Print Cited Medium: Internet ISSN: 1079-7114 (Electronic) Linking ISSN: 00319007 NLM ISO Abbreviation: Phys Rev Lett Subsets: PubMed not MEDLINE; MEDLINE
Subject
Language
English
Abstract
We measure the tau-to-light-lepton ratio of inclusive B-meson branching fractions R(X_{τ/ℓ})≡B(B→Xτν)/B(B→Xℓν), where ℓ indicates an electron or muon, and thereby test the universality of charged-current weak interactions. We select events that have one fully reconstructed B meson and a charged lepton candidate from 189 fb^{-1} of electron-positron collision data collected with the Belle II detector. We find R(X_{τ/ℓ})=0.228±0.016(stat)±0.036(syst), in agreement with standard-model expectations. This is the first direct measurement of R(X_{τ/ℓ}).