Measurement of R(D) and R(D^{}) with a Semileptonic Tagging Method

G Caria; P Urquijo; I Adachi; H Aihara; S Al Said; D M Asner; H Atmacan; T Aushev; V Babu; I Badhrees; S Bahinipati; A M Bakich; P Behera; C Beleño; J Bennett; B Bhuyan; T Bilka; J Biswal; A Bozek; M Bračko; T E Browder; M Campajola; D Červenkov; P Chang; R Cheaib; V Chekelian; A Chen; B G Cheon; K Chilikin; H E Cho; K Cho; Y Choi; S Choudhury; D Cinabro; S Cunliffe; N Dash; G De Nardo; F Di Capua; S Di Carlo; Z Doležal; T V Dong; S Eidelman; D Epifanov; J E Fast; T Ferber; D Ferlewicz; B G Fulsom; R Garg; V Gaur; N Gabyshev; A Garmash; A Giri; P Goldenzweig; D Greenwald; O Grzymkowska; Y Guan; O Hartbrich; K Hayasaka; H Hayashii; T Higuchi; W-S Hou; C-L Hsu; T Iijima; K Inami; G Inguglia; A Ishikawa; R Itoh; M Iwasaki; Y Iwasaki; W W Jacobs; H B Jeon; S Jia; Y Jin; D Joffe; K K Joo; A B Kaliyar; K H Kang; G Karyan; T Kawasaki; H Kichimi; C H Kim; D Y Kim; H J Kim; K T Kim; S H Kim; K Kinoshita; P Kodyš; S Korpar; D Kotchetkov; P Križan; R Kroeger; J-F Krohn; P Krokovny; T Kuhr; R Kumar; Y-J Kwon; J S Lange; I S Lee; J K Lee; S C Lee; L K Li; Y B Li; L Li Gioi; J Libby; K Lieret; D Liventsev; T Luo; C MacQueen; M Masuda; T Matsuda; D Matvienko; M Merola; F Metzner; K Miyabayashi; G B Mohanty; T J Moon; T Mori; R Mussa; K R Nakamura; M Nakao; K J Nath; M Nayak; N K Nisar; S Nishida; K Nishimura; K Ogawa; H Ono; Y Onuki; P Oskin; P Pakhlov; G Pakhlova; B Pal; T Pang; H Park; S-H Park; S Patra; S Paul; T K Pedlar; R Pestotnik; L E Piilonen; V Popov; E Prencipe; M T Prim; A Rabusov; P K Resmi; M Ritter; M Rozanska; G Russo; D Sahoo; Y Sakai; S Sandilya; L Santelj; T Sanuki; V Savinov; O Schneider; G Schnell; J Schueler; C Schwanda; A J Schwartz; Y Seino; K Senyo; M E Sevior; V Shebalin; J-G Shiu; B Shwartz; F Simon; A Sokolov; E Solovieva; M Starič; Z S Stottler; T Sumiyoshi; W Sutcliffe; M Takizawa; U Tamponi; K Tanida; F Tenchini; K Trabelsi; M Uchida; T Uglov; S Uno; Y Usov; S E Vahsen; R Van Tonder; G Varner; K E Varvell; A Vossen; E Waheed; B Wang; C H Wang; M-Z Wang; P Wang; X L Wang; S Watanuki; J Wiechczynski; E Won; H Yamamoto; S B Yang; H Ye; J H Yin; C Z Yuan; Z P Zhang; V Zhilich; V Zhukova; V Zhulanov; Belle Collaboration

doi:10.1103/PhysRevLett.124.161803

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$Measurement of R(D) and R(D^{}) with a Semileptonic Tagging Method$

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Measurement of R(D) and R(D^{}) with a Semileptonic Tagging Method

G Caria, P Urquijo, I Adachi, H Aihara, S Al Said, D M Asner, H Atmacan, T Aushev, V Babu, I Badhrees, …

Physical review letters, Vol.124(16), pp.161803-161803

24/04/2020

DOI: https://doi.org/10.1103/PhysRevLett.124.161803

PMID: 32383937

Abstract

The experimental results on the ratios of branching fractions R(D)=B(B[over ¯]→Dτ^{-}ν[over ¯]_{τ})/B(B[over ¯]→Dℓ^{-}ν[over ¯]_{ℓ}) and R(D^{*})=B(B[over ¯]→D^{*}τ^{-}ν[over ¯]_{τ})/B(B[over ¯]→D^{*}ℓ^{-}ν[over ¯]_{ℓ}), where ℓ denotes an electron or a muon, show a long-standing discrepancy with the standard model predictions, and might hint at a violation of lepton flavor universality. We report a new simultaneous measurement of R(D) and R(D^{*}), based on a data sample containing 772×10^{6} BB[over ¯] events recorded at the ϒ(4S) resonance with the Belle detector at the KEKB e^{+}e^{-} collider. In this analysis the tag-side B meson is reconstructed in a semileptonic decay mode and the signal-side τ is reconstructed in a purely leptonic decay. The measured values are R(D)=0.307±0.037±0.016 and R(D^{*})=0.283±0.018±0.014, where the first uncertainties are statistical and the second are systematic. These results are in agreement with the standard model predictions within 0.2, 1.1, and 0.8 standard deviations for R(D), R(D^{*}), and their combination, respectively. This work constitutes the most precise measurements of R(D) and R(D^{*}) performed to date as well as the first result for R(D) based on a semileptonic tagging method.

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Title: Measurement of R(D) and R(D^{}) with a Semileptonic Tagging Method
Creators - without role: G Caria - University of Melbourne
P Urquijo - University of Melbourne
I Adachi - High Energy Accelerator Research Organization
H Aihara - The University of Tokyo
S Al Said - University of Tabuk
D M Asner - Brookhaven National Laboratory
H Atmacan - University of South Carolina
T Aushev - Moscow Institute of Physics and Technology (Russia, Dolgoprudnyy) - MIPT
V Babu - Deutsches Elektronen-Synchrotron, 22607 Hamburg
I Badhrees - University of Tabuk
S Bahinipati - Indian Institute of Technology Bhubaneswar
A M Bakich - University of Sydney
P Behera - Indian Institute of Technology Madras
C Beleño - II. Physikalisches Institut, Georg-August-Universität Göttingen, 37073 Göttingen
J Bennett - University of Mississippi
B Bhuyan - Indian Institute of Technology Guwahati
T Bilka - Charles University
J Biswal - J. Stefan Institute, 1000 Ljubljana
A Bozek - Institute of Nuclear Physics
M Bračko - University of Maribor
T E Browder - University of Hawaii System
M Campajola - Università di Napoli Federico II, 80055 Napoli
D Červenkov - Charles University
P Chang - National Taiwan University
R Cheaib - University of Mississippi
V Chekelian - Max
A Chen - National Central University, Chung-li 32054
B G Cheon - Hanyang University
K Chilikin - P.N. Lebedev Physical Institute of the Russian Academy of Sciences
H E Cho - Hanyang University
K Cho - Korea Institute of Science and Technology Information, Daejeon 34141
Y Choi - Sungkyunkwan University
S Choudhury - Indian Institute of Technology Hyderabad
D Cinabro - Wayne State University
S Cunliffe - Deutsches Elektronen-Synchrotron, 22607 Hamburg
N Dash - Indian Institute of Technology Bhubaneswar
G De Nardo - Università di Napoli Federico II, 80055 Napoli
F Di Capua - Università di Napoli Federico II, 80055 Napoli
S Di Carlo - University of Paris-Sud
Z Doležal - Charles University
T V Dong - Fudan University
S Eidelman - Novosibirsk State University
D Epifanov - Novosibirsk State University
J E Fast - Pacific Northwest National Laboratory
T Ferber - Deutsches Elektronen-Synchrotron, 22607 Hamburg
D Ferlewicz - University of Melbourne
B G Fulsom - Pacific Northwest National Laboratory
R Garg - Panjab University
V Gaur - Virginia Tech
N Gabyshev - Novosibirsk State University
A Garmash - Novosibirsk State University
A Giri - Indian Institute of Technology Hyderabad
P Goldenzweig - Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe
D Greenwald - Department of Physics, Technische Universität München, 85748 Garching
O Grzymkowska - H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342
Y Guan - University of Cincinnati
O Hartbrich - University of Hawaii System
K Hayasaka - Niigata University
H Hayashii - Nara Women's University
T Higuchi - The University of Tokyo
W-S Hou - National Taiwan University
C-L Hsu - University of Sydney
T Iijima - Nagoya University
K Inami - Nagoya University
G Inguglia - Institute of High Energy Physics, Vienna 1050
A Ishikawa - High Energy Accelerator Research Organization
R Itoh - High Energy Accelerator Research Organization
M Iwasaki - Osaka City University
Y Iwasaki - High Energy Accelerator Research Organization
W W Jacobs - Indiana University Bloomington
H B Jeon - Kyungpook National University
S Jia - Beihang University
Y Jin - The University of Tokyo
D Joffe - Kennesaw State University
K K Joo - Chonnam National University
A B Kaliyar - Indian Institute of Technology Madras
K H Kang - Kyungpook National University
G Karyan - Deutsches Elektronen-Synchrotron, 22607 Hamburg
T Kawasaki - Kitasato University
H Kichimi - High Energy Accelerator Research Organization
C H Kim - Hanyang University
D Y Kim - Soongsil University
H J Kim - Kyungpook National University
K T Kim - University of Seoul
S H Kim - Hanyang University
K Kinoshita - University of Cincinnati
P Kodyš - Charles University
S Korpar - University of Maribor
D Kotchetkov - University of Hawaii System
P Križan - University of Ljubljana
R Kroeger - University of Mississippi
J-F Krohn - University of Melbourne
P Krokovny - Novosibirsk State University
T Kuhr - Ludwig Maximilians University, 80539 Munich
R Kumar - Punjab Agricultural University
Y-J Kwon - Yonsei University
J S Lange - Justus-Liebig-Universität Gießen, 35392 Gießen
I S Lee - Hanyang University
J K Lee - Seoul National University
S C Lee - Kyungpook National University
L K Li - Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049
Y B Li - Peking University
L Li Gioi - Max
J Libby - Indian Institute of Technology Madras
K Lieret - Ludwig Maximilians University, 80539 Munich
D Liventsev - Virginia Tech
T Luo - Fudan University
C MacQueen - University of Melbourne
M Masuda - The University of Tokyo
T Matsuda - University of Miyazaki
D Matvienko - Novosibirsk State University
M Merola - Università di Napoli Federico II, 80055 Napoli
F Metzner - Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe
K Miyabayashi - Nara Women's University
G B Mohanty - Tata Institute of Fundamental Research
T J Moon - Seoul National University
T Mori - Nagoya University
R Mussa - INFN Sezione di Torino
K R Nakamura - High Energy Accelerator Research Organization
M Nakao - High Energy Accelerator Research Organization
K J Nath - Indian Institute of Technology Guwahati
M Nayak - Wayne State University
N K Nisar - University of Pittsburgh
S Nishida - High Energy Accelerator Research Organization
K Nishimura - University of Hawaii System
K Ogawa - Niigata University
H Ono - Niigata University
Y Onuki - The University of Tokyo
P Oskin - P.N. Lebedev Physical Institute of the Russian Academy of Sciences
P Pakhlov - Moscow Physical Engineering Institute, Moscow 115409
G Pakhlova - Moscow Institute of Physics and Technology (Russia, Dolgoprudnyy) - MIPT
B Pal - Brookhaven National Laboratory
T Pang - University of Pittsburgh
H Park - Kyungpook National University
S-H Park - Yonsei University
S Patra - Indian Institute of Science Education and Research Mohali
S Paul - Department of Physics, Technische Universität München, 85748 Garching
T K Pedlar - Luther College
R Pestotnik - J. Stefan Institute, 1000 Ljubljana
L E Piilonen - Virginia Tech
V Popov - Moscow Institute of Physics and Technology (Russia, Dolgoprudnyy) - MIPT
E Prencipe - Forschungszentrum Jülich
M T Prim - Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe
A Rabusov - Department of Physics, Technische Universität München, 85748 Garching
P K Resmi - Indian Institute of Technology Madras
M Ritter - Ludwig Maximilians University, 80539 Munich
M Rozanska - H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342
G Russo - Università di Napoli Federico II, 80055 Napoli
D Sahoo - Tata Institute of Fundamental Research
Y Sakai - High Energy Accelerator Research Organization
S Sandilya - University of Cincinnati
L Santelj - High Energy Accelerator Research Organization
T Sanuki - Tohoku University
V Savinov - University of Pittsburgh
O Schneider - École Polytechnique Fédérale de Lausanne
G Schnell - Ikerbasque
J Schueler - University of Hawaii System
C Schwanda - Institute of High Energy Physics, Vienna 1050
A J Schwartz - University of Cincinnati
Y Seino - Niigata University
K Senyo - Yamagata University
M E Sevior - University of Melbourne
V Shebalin - University of Hawaii System
J-G Shiu - National Taiwan University
B Shwartz - Novosibirsk State University
F Simon - Max
A Sokolov - Institute for High Energy Physics, Protvino 142281
E Solovieva - P.N. Lebedev Physical Institute of the Russian Academy of Sciences
M Starič - J. Stefan Institute, 1000 Ljubljana
Z S Stottler - Virginia Tech
T Sumiyoshi - Tokyo Metropolitan University
W Sutcliffe - Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe
M Takizawa - Showa Pharmaceutical University
U Tamponi - INFN Sezione di Torino
K Tanida - Japan Atomic Energy Agency
F Tenchini - Deutsches Elektronen-Synchrotron, 22607 Hamburg
K Trabelsi - University of Paris-Sud
M Uchida - Tokyo Institute of Technology
T Uglov - Moscow Institute of Physics and Technology (Russia, Dolgoprudnyy) - MIPT
S Uno - High Energy Accelerator Research Organization
Y Usov - Novosibirsk State University
S E Vahsen - University of Hawaii System
R Van Tonder - Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe
G Varner - University of Hawaii System
K E Varvell - University of Sydney
A Vossen - Duke University
E Waheed - University of Melbourne
B Wang - Max
C H Wang - National United University, Miao Li 36003
M-Z Wang - National Taiwan University
P Wang - Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049
X L Wang - Fudan University
S Watanuki - Tohoku University
J Wiechczynski - H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342
E Won - University of Seoul
H Yamamoto - Tohoku University
S B Yang - University of Seoul
H Ye - Deutsches Elektronen-Synchrotron, 22607 Hamburg
J H Yin - Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049
C Z Yuan - Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049
Z P Zhang - University of Science and Technology of China, Hefei 230026
V Zhilich - Novosibirsk State University
V Zhukova - P.N. Lebedev Physical Institute of the Russian Academy of Sciences
V Zhulanov - Novosibirsk State University
Belle Collaboration
Publication Details: Physical review letters, Vol.124(16), pp.161803-161803
Identifiers: 9918778408331
Academic Unit: King Abdulaziz City for Science & Technology; University of Tabuk; King Abdulaziz University; King Abdullah University of Science & Technology
Language: English
Resource Type: Journal article