First Measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>R</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:msub><mml:mrow><mml:mi>X</mml:mi></mml:mrow><mml:mrow><mml:mi>τ</mml:mi><mml:mo>/</mml:mo><mml:mo>ℓ</mml:mo></mml:mrow></mml:msub><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math> as an Inclusive Test of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>b</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>c</mml:mi><mml:mi>τ</mml:mi><mml:mi>ν</mml:mi></mml:mrow></mml:math> Anomaly-Reference-Cited by-同舟云学术

First Measurement of R(Xτ/ℓ) as an Inclusive Test of the b→cτν Anomaly

Published:2024-05-23 Issue:21 Volume:132 Page:
ISSN:0031-9007
Container-title:Physical Review Letters
language:en
Short-container-title:Phys. Rev. Lett.

Author:

Adachi I.^ORCID,Adamczyk K.^ORCID,Aggarwal L.^ORCID,Ahmed H.^ORCID,Aihara H.^ORCID,Akopov N.^ORCID,Aloisio A.^ORCID,Asner D. M.^ORCID,Atmacan H.^ORCID,Aushev T.^ORCID,Aushev V.^ORCID,Aversano M.^ORCID,Babu V.^ORCID,Bahinipati S.^ORCID,Bambade P.^ORCID,Banerjee Sw.^ORCID,Bansal S.^ORCID,Barrett M.^ORCID,Baudot J.^ORCID,Baur A.^ORCID,Beaubien A.^ORCID,Becherer F.^ORCID,Becker J.^ORCID,Bennett J. V.^ORCID,Bernlochner F. U.^ORCID,Bertacchi V.^ORCID,Bertemes M.^ORCID,Bertholet E.^ORCID,Bessner M.^ORCID,Bettarini S.^ORCID,Bhuyan B.^ORCID,Bianchi F.^ORCID,Bilka T.^ORCID,Bilokin S.^ORCID,Biswas D.^ORCID,Bobrov A.^ORCID,Bodrov D.^ORCID,Bolz A.^ORCID,Bondar A.^ORCID,Bozek A.^ORCID,Bračko M.^ORCID,Branchini P.^ORCID,Briere R. A.^ORCID,Browder T. E.^ORCID,Budano A.^ORCID,Bussino S.^ORCID,Campajola M.^ORCID,Cao L.^ORCID,Casarosa G.^ORCID,Cecchi C.^ORCID,Cerasoli J.^ORCID,Chang M.-C.^ORCID,Chang P.^ORCID,Cheema P.^ORCID,Cheon B. G.^ORCID,Chilikin K.^ORCID,Chirapatpimol K.^ORCID,Cho H.-E.^ORCID,Cho K.^ORCID,Cho S.-J.^ORCID,Choi S.-K.^ORCID,Choudhury S.^ORCID,Corona L.^ORCID,Cremaldi L. M.^ORCID,Dattola F.^ORCID,De La Cruz-Burelo E.^ORCID,De La Motte S. A.^ORCID,de Marino G.^ORCID,De Nardo G.^ORCID,De Nuccio M.^ORCID,De Pietro G.^ORCID,de Sangro R.^ORCID,Destefanis M.^ORCID,Dhamija R.^ORCID,Di Canto A.^ORCID,Di Capua F.^ORCID,Dingfelder J.^ORCID,Doležal Z.^ORCID,Dong T. V.^ORCID,Dorigo M.^ORCID,Dort K.^ORCID,Dreyer S.^ORCID,Dubey S.^ORCID,Dujany G.^ORCID,Ecker P.^ORCID,Eliachevitch M.^ORCID,Epifanov D.^ORCID,Feichtinger P.^ORCID,Ferber T.^ORCID,Ferlewicz D.^ORCID,Fillinger T.^ORCID,Finocchiaro G.^ORCID,Fodor A.^ORCID,Forti F.^ORCID,Frey A.^ORCID,Fulsom B. G.^ORCID,Ganiev E.^ORCID,Garcia-Hernandez M.^ORCID,Garg R.^ORCID,Gaudino G.^ORCID,Gaur V.^ORCID,Gaz A.^ORCID,Gellrich A.^ORCID,Ghevondyan G.^ORCID,Ghosh D.^ORCID,Ghumaryan H.^ORCID,Giakoustidis G.^ORCID,Giordano R.^ORCID,Giri A.^ORCID,Gobbo B.^ORCID,Godang R.^ORCID,Gogota O.^ORCID,Goldenzweig P.^ORCID,Gradl W.^ORCID,Grammatico T.^ORCID,Granderath S.^ORCID,Graziani E.^ORCID,Greenwald D.^ORCID,Gruberová Z.^ORCID,Gu T.^ORCID,Gudkova K.^ORCID,Halder S.^ORCID,Han Y.^ORCID,Hara T.^ORCID,Hayashii H.^ORCID,Hazra S.^ORCID,Hearty C.^ORCID,Hedges M. T.^ORCID,Heidelbach A.^ORCID,Heredia de la Cruz I.^ORCID,Hernández Villanueva M.^ORCID,Higuchi T.^ORCID,Hoek M.^ORCID,Hohmann M.^ORCID,Horak P.^ORCID,Hsu C.-L.^ORCID,Humair T.^ORCID,Iijima T.^ORCID,Ipsita N.^ORCID,Ishikawa A.^ORCID,Itoh R.^ORCID,Iwasaki M.^ORCID,Jackson P.^ORCID,Jacobs W. W.^ORCID,Jaffe D. E.^ORCID,Jang E.-J.^ORCID,Jia S.^ORCID,Jin Y.^ORCID,Joo K. K.^ORCID,Junkerkalefeld H.^ORCID,Kalita D.^ORCID,Kaliyar A. B.^ORCID,Kandra J.^ORCID,Kang K. H.^ORCID,Karyan G.^ORCID,Kawasaki T.^ORCID,Keil F.^ORCID,Kiesling C.^ORCID,Kim C.-H.^ORCID,Kim D. Y.^ORCID,Kim K.-H.^ORCID,Kim Y.-K.^ORCID,Kinoshita K.^ORCID,Kodyš P.^ORCID,Koga T.^ORCID,Kohani S.^ORCID,Kojima K.^ORCID,Korobov A.^ORCID,Korpar S.^ORCID,Kovalenko E.^ORCID,Kowalewski R.^ORCID,Kraetzschmar T. M. G.^ORCID,Križan P.^ORCID,Krokovny P.^ORCID,Kuhr T.^ORCID,Kulii Y.^ORCID,Kumar M.^ORCID,Kumara K.^ORCID,Kunigo T.^ORCID,Kuzmin A.^ORCID,Kwon Y.-J.^ORCID,Lacaprara S.^ORCID,Lam T.^ORCID,Lanceri L.^ORCID,Lange J. S.^ORCID,Laurenza M.^ORCID,Leboucher R.^ORCID,Le Diberder F. R.^ORCID,Lee M. J.^ORCID,Levit D.^ORCID,Lewis P. M.^ORCID,Li L. K.^ORCID,Li Y.^ORCID,Li Y. B.^ORCID,Libby J.^ORCID,Liu M.^ORCID,Liu Q. Y.^ORCID,Liu Z. Q.^ORCID,Liventsev D.^ORCID,Longo S.^ORCID,Lueck T.^ORCID,Luo T.^ORCID,Lyu C.^ORCID,Ma Y.^ORCID,Maggiora M.^ORCID,Maharana S. P.^ORCID,Maiti R.^ORCID,Maity S.^ORCID,Mancinelli G.^ORCID,Manfredi R.^ORCID,Manoni E.^ORCID,Manthei A. C.^ORCID,Mantovano M.^ORCID,Marcantonio D.^ORCID,Marcello S.^ORCID,Marinas C.^ORCID,Martel L.^ORCID,Martellini C.^ORCID,Martinov T.^ORCID,Massaccesi L.^ORCID,Masuda M.^ORCID,Matsuda T.^ORCID,Matsuoka K.^ORCID,Matvienko D.^ORCID,Maurya S. K.^ORCID,McKenna J. A.^ORCID,Mehta R.^ORCID,Meier F.^ORCID,Merola M.^ORCID,Metzner F.^ORCID,Milesi M.^ORCID,Miller C.^ORCID,Mirra M.^ORCID,Miyabayashi K.^ORCID,Miyake H.^ORCID,Mizuk R.^ORCID,Mohanty G. B.^ORCID,Molina-Gonzalez N.^ORCID,Mondal S.^ORCID,Moneta S.^ORCID,Moser H.-G.^ORCID,Mrvar M.^ORCID,Mussa R.^ORCID,Nakamura I.^ORCID,Nakao M.^ORCID,Nakazawa Y.^ORCID,Narimani Charan A.^ORCID,Naruki M.^ORCID,Narwal D.^ORCID,Natkaniec Z.^ORCID,Natochii A.^ORCID,Nayak L.^ORCID,Nayak M.^ORCID,Nazaryan G.^ORCID,Niebuhr C.^ORCID,Nishida S.^ORCID,Ogawa S.^ORCID,Ono H.^ORCID,Onuki Y.^ORCID,Oskin P.^ORCID,Otani F.^ORCID,Pakhlov P.^ORCID,Pakhlova G.^ORCID,Panta A.^ORCID,Pardi S.^ORCID,Park H.^ORCID,Park S.-H.^ORCID,Paschen B.^ORCID,Passeri A.^ORCID,Patra S.^ORCID,Paul S.^ORCID,Pedlar T. K.^ORCID,Peschke R.^ORCID,Pestotnik R.^ORCID,Piccolo M.^ORCID,Piilonen L. E.^ORCID,Podesta-Lerma P. L. M.^ORCID,Podobnik T.^ORCID,Pokharel S.^ORCID,Praz C.^ORCID,Prell S.^ORCID,Prencipe E.^ORCID,Prim M. T.^ORCID,Purwar H.^ORCID,Rados P.^ORCID,Raeuber G.^ORCID,Raiz S.^ORCID,Rauls N.^ORCID,Reif M.^ORCID,Reiter S.^ORCID,Ripp-Baudot I.^ORCID,Rizzo G.^ORCID,Robertson S. H.^ORCID,Rocchetti P.^ORCID,Roehrken M.^ORCID,Roney J. M.^ORCID,Rostomyan A.^ORCID,Rout N.^ORCID,Russo G.^ORCID,Sakai Y.^ORCID,Sanders D. A.^ORCID,Sandilya S.^ORCID,Santelj L.^ORCID,Sato Y.^ORCID,Savinov V.^ORCID,Scavino B.^ORCID,Schmitt C.^ORCID,Schwanda C.^ORCID,Seino Y.^ORCID,Selce A.^ORCID,Senyo K.^ORCID,Serrano J.^ORCID,Sevior M. E.^ORCID,Sfienti C.^ORCID,Shan W.^ORCID,Shen C. P.^ORCID,Shi X. D.^ORCID,Shillington T.^ORCID,Shimasaki T.^ORCID,Shiu J.-G.^ORCID,Shtol D.^ORCID,Sibidanov A.^ORCID,Simon F.^ORCID,Singh J. B.^ORCID,Skorupa J.^ORCID,Sobie R. J.^ORCID,Sobotzik M.^ORCID,Soffer A.^ORCID,Sokolov A.^ORCID,Solovieva E.^ORCID,Spataro S.^ORCID,Spruck B.^ORCID,Starič M.^ORCID,Stavroulakis P.^ORCID,Stefkova S.^ORCID,Stroili R.^ORCID,Sumihama M.^ORCID,Sumisawa K.^ORCID,Svidras H.^ORCID,Takizawa M.^ORCID,Tamponi U.^ORCID,Tanaka S.^ORCID,Tanida K.^ORCID,Tenchini F.^ORCID,Tittel O.^ORCID,Tiwary R.^ORCID,Tonelli D.^ORCID,Torassa E.^ORCID,Trabelsi K.^ORCID,Tsaklidis I.^ORCID,Uchida M.^ORCID,Ueda I.^ORCID,Uematsu Y.^ORCID,Uglov T.^ORCID,Unger K.^ORCID,Unno Y.^ORCID,Uno K.^ORCID,Uno S.^ORCID,Urquijo P.^ORCID,Ushiroda Y.^ORCID,Vahsen S. E.^ORCID,van Tonder R.^ORCID,Varvell K. E.^ORCID,Veronesi M.^ORCID,Vinokurova A.^ORCID,Vismaya V. S.^ORCID,Vitale L.^ORCID,Volpe R.^ORCID,Wach B.^ORCID,Wakai M.^ORCID,Wallner S.^ORCID,Wang M.-Z.^ORCID,Wang X. L.^ORCID,Wang Z.^ORCID,Warburton A.^ORCID,Watanuki S.^ORCID,Wessel C.^ORCID,Won E.^ORCID,Xu X. P.^ORCID,Yabsley B. D.^ORCID,Yamada S.^ORCID,Yang S. B.^ORCID,Yelton J.^ORCID,Yin J. H.^ORCID,Yoshihara K.^ORCID,Yuan C. Z.^ORCID,Zhang B.^ORCID,Zhang Y.^ORCID,Zhilich V.^ORCID,Zhou Q. D.^ORCID,Zhou X. Y.^ORCID,Zhukova V. I.^ORCID,

Abstract

We measure the tau-to-light-lepton ratio of inclusive B-meson branching fractions R(Xτ/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(Xτ/ℓ)=0.228±0.016(stat)±0.036(syst), in agreement with standard-model expectations. This is the first direct measurement of R(Xτ/ℓ).

Published by the American Physical Society

2024

Funder

Australian Research Council

Bundesministerium für Bildung, Wissenschaft und Forschung

H2020 European Research Council

Natural Sciences and Engineering Research Council of Canada

Compute Canada

Canarie

National Key Research and Development Program of China

National Natural Science Foundation of China

Natural Science Foundation of Shandong Province

Grantová Agentura České Republiky

Seventh Framework Programme

HORIZON EUROPE Marie Sklodowska-Curie Actions

Institut National de Physique Nucléaire et de Physique des Particules

Agence Nationale de la Recherche

Bundesministerium für Bildung und Forschung

Deutsche Forschungsgemeinschaft

Helmholtz-Gemeinschaft

Max-Planck-Gesellschaft

Alexander von Humboldt-Stiftung

Department of Atomic Energy, Government of India

University of Petroleum and Energy Studies

Department of Science and Technology, Ministry of Science and Technology, India

Israel Science Foundation

United States-Israel Binational Science Foundation

Ministry of Culture and Sport

Istituto Nazionale di Fisica Nucleare Sezione di Padova

Japan Society for the Promotion of Science

National Institute of Informatics

Ministry of Education, Culture, Sports, Science and Technology

National Research Foundation of Korea

Akademi Sains Malaysia

Ministry of Education and Science of the Russian Federation

Health and Safety Executive

University of Tabuk

Agencia Estatal de Investigación

Generalitat Valenciana

National Science and Technology Council

National Research Foundation of Ukraine

National Science Foundation

U.S. Department of Energy

Vietnam Academy of Science and Technology

Univerzita Karlova v Praze

Science Committee of the Republic of Armenia

Radiation Science Research Institute

Frontiers of Science Program

Slovenian Research Agency and research

Publisher

American Physical Society (APS)

Link

http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.132.211804/fulltext

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