Measurement of the branching ratio of B0 →d∗+τ- ν τ relative to B 0 →d∗+ℓ −νℓ  decays with a semileptonic tagging method

Belle Collaboration

doi:10.1103/PhysRevD.94.072007

Measurement of the branching ratio of B0 →d∗+τ- ν τ relative to B 0 →d∗+ℓ −νℓ decays with a semileptonic tagging method

Belle Collaboration

Chair of Physics I

High Energy Accelerator Research Organization (KEK)
Nagoya University
Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences
University of Tokyo
Pacific Northwest National Laboratory
Middle East Technical University (METU)
Moscow Institute of Physics and Technology
University of Tabuk
Tata Institute of Fundamental Research, Mumbai
King Abdulaziz City for Science and Technology
University of Sydney
Indian Institute of Technology Madras
Indian Institute of Science Education and Research Mohali
Indian Institute of Technology Guwahati
Jožef Stefan Institute
Wayne State University
University of Maribor
Charles University
National Taiwan University
Max-Planck-Institut für Physik
National Central University
Hanyang University
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
National Research Nuclear University MEPhI
Korea Institute of Science and Technology Information
Sungkyunkwan University
Indian Institute of Technology Bhubaneswar
Budker Institute of Nuclear Physics (SB RAS)
Novosibirsk State University
Deutsches Elektronen-Synchrotron (DESY)
Humanoid Technologies Lab (H2T)
Univ. of Ljubljana
Technical University of Munich
KEK and Graduate University for Advanced Studies (Sokendai)
University of Bonn
Niigata University
Nara Women's University
Tohoku University
University of Hawaii
Kyungpook National University
Kennesaw State University
University of Melbourne
Soongsil University
Korea University
Univ. of Cincinnati
University of Munich
Punjab Agricultural University
Yonsei University
Justus-Liebig-Universität Gießen
University of Science and Technology of China
Virginia Polytechnic Institute and State University
University of Pittsburgh
University of Miyazaki
Cluster of Excellence E-conversion
Osaka Prefecture University
Aligarh Muslim University
Toho University
Kanagawa University
Seoul National University
Luther College, Decorah
University of South Carolina
EPFL
Biodonostia Health Research Institute-CIBERNED-UPV-EHU
Basque Foundation for Science
Österreichische Akademie der Wissenschaften
Yamagata University
Beihang University
Tokyo Institute of Technology
University of Nova Gorica
Tokyo Metropolitan University
Riken
Showa Pharmaceutical University
INFN Sez. di Torino
University of Torino
National United University Taiwan
Institute of High Energy Physics Chinese Academy of Science
Nippon Dental University
University of Florida

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Abstract

We report a measurement of the ratio R(D∗)=B(B0→D∗+τ-ντ)/B(B0→D∗+ν), where denotes an electron or a muon. The results are based on a data sample containing 772×106 BB pairs recorded at the (4S) resonance with the Belle detector at the KEKB e+e- collider. We select a sample of B0B0 pairs by reconstructing both B mesons in semileptonic decays to D∗ ±. We measure R(D∗)=0.302±0.030(stat)±0.011(syst), which is within 1.6σ of the Standard Model theoretical expectation, where the standard deviation σ includes systematic uncertainties. We use this measurement to constrain several scenarios of new physics in a model-independent approach.

Original language	English
Article number	072007
Journal	Physical Review D
Volume	94
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.94.072007
State	Published - 27 Oct 2016

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10.1103/PhysRevD.94.072007

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@article{bc7dcb778bff4d748d930023d130b747,

title = "Measurement of the branching ratio of B0 →d∗+τ- ν τ relative to B 0 →d∗+ℓ −νℓ decays with a semileptonic tagging method",

abstract = "We report a measurement of the ratio R(D∗)=B(B0→D∗+τ-ντ)/B(B0→D∗+ν), where denotes an electron or a muon. The results are based on a data sample containing 772×106 BB pairs recorded at the (4S) resonance with the Belle detector at the KEKB e+e- collider. We select a sample of B0B0 pairs by reconstructing both B mesons in semileptonic decays to D∗ ±. We measure R(D∗)=0.302±0.030(stat)±0.011(syst), which is within 1.6σ of the Standard Model theoretical expectation, where the standard deviation σ includes systematic uncertainties. We use this measurement to constrain several scenarios of new physics in a model-independent approach.",

author = "\{Belle Collaboration\} and Y. Sato and T. Iijima and K. Adamczyk and H. Aihara and Asner, \{D. M.\} and H. Atmacan and T. Aushev and R. Ayad and T. Aziz and V. Babu and I. Badhrees and Bakich, \{A. M.\} and V. Bansal and P. Behera and V. Bhardwaj and B. Bhuyan and J. Biswal and G. Bonvicini and A. Bozek and M. Bra{\v c}ko and D. {\v C}ervenkov and P. Chang and V. Chekelian and A. Chen and Cheon, \{B. G.\} and K. Chilikin and R. Chistov and K. Cho and V. Chobanova and Y. Choi and D. Cinabro and M. Danilov and N. Dash and \{Di Carlo\}, S. and Z. Dole{\v Z}al and D. Dutta and S. Eidelman and D. Epifanov and H. Farhat and Fast, \{J. E.\} and T. Ferber and Fulsom, \{B. G.\} and V. Gaur and N. Gabyshev and A. Garmash and P. Goldenzweig and B. Golob and D. Greenwald and K. Hara and S. Paul",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = oct,

day = "27",

doi = "10.1103/PhysRevD.94.072007",

language = "English",

volume = "94",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "7",

}

TY - JOUR

T1 - Measurement of the branching ratio of B0 →d∗+τ- ν τ relative to B 0 →d∗+ℓ −νℓ decays with a semileptonic tagging method

AU - Belle Collaboration

AU - Sato, Y.

AU - Iijima, T.

AU - Adamczyk, K.

AU - Aihara, H.

AU - Asner, D. M.

AU - Atmacan, H.

AU - Aushev, T.

AU - Ayad, R.

AU - Aziz, T.

AU - Babu, V.

AU - Badhrees, I.

AU - Bakich, A. M.

AU - Bansal, V.

AU - Behera, P.

AU - Bhardwaj, V.

AU - Bhuyan, B.

AU - Biswal, J.

AU - Bonvicini, G.

AU - Bozek, A.

AU - Bračko, M.

AU - Červenkov, D.

AU - Chang, P.

AU - Chekelian, V.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Chistov, R.

AU - Cho, K.

AU - Chobanova, V.

AU - Choi, Y.

AU - Cinabro, D.

AU - Danilov, M.

AU - Dash, N.

AU - Di Carlo, S.

AU - DoleŽal, Z.

AU - Dutta, D.

AU - Eidelman, S.

AU - Epifanov, D.

AU - Farhat, H.

AU - Fast, J. E.

AU - Ferber, T.

AU - Fulsom, B. G.

AU - Gaur, V.

AU - Gabyshev, N.

AU - Garmash, A.

AU - Goldenzweig, P.

AU - Golob, B.

AU - Greenwald, D.

AU - Hara, K.

AU - Paul, S.

PY - 2016/10/27

Y1 - 2016/10/27

N2 - We report a measurement of the ratio R(D∗)=B(B0→D∗+τ-ντ)/B(B0→D∗+ν), where denotes an electron or a muon. The results are based on a data sample containing 772×106 BB pairs recorded at the (4S) resonance with the Belle detector at the KEKB e+e- collider. We select a sample of B0B0 pairs by reconstructing both B mesons in semileptonic decays to D∗ ±. We measure R(D∗)=0.302±0.030(stat)±0.011(syst), which is within 1.6σ of the Standard Model theoretical expectation, where the standard deviation σ includes systematic uncertainties. We use this measurement to constrain several scenarios of new physics in a model-independent approach.

AB - We report a measurement of the ratio R(D∗)=B(B0→D∗+τ-ντ)/B(B0→D∗+ν), where denotes an electron or a muon. The results are based on a data sample containing 772×106 BB pairs recorded at the (4S) resonance with the Belle detector at the KEKB e+e- collider. We select a sample of B0B0 pairs by reconstructing both B mesons in semileptonic decays to D∗ ±. We measure R(D∗)=0.302±0.030(stat)±0.011(syst), which is within 1.6σ of the Standard Model theoretical expectation, where the standard deviation σ includes systematic uncertainties. We use this measurement to constrain several scenarios of new physics in a model-independent approach.

UR - https://www.scopus.com/pages/publications/84993990715

U2 - 10.1103/PhysRevD.94.072007

DO - 10.1103/PhysRevD.94.072007

M3 - Article

AN - SCOPUS:84993990715

SN - 2470-0010

VL - 94

JO - Physical Review D

JF - Physical Review D

IS - 7

M1 - 072007

ER -

Measurement of the branching ratio of B0 →d∗+τ- ν τ relative to B 0 →d∗+ℓ −νℓ decays with a semileptonic tagging method

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