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

High Energy Accelerator Research Organization, Tsukuba
Nagoya University
H. Niewodniczanski Institute of Nuclear Physics
The University of Tokyo
Pacific Northwest National Laboratory
Middle East Technical University
Moscow Institute of Physics and Technology
University of Tabuk
Tata Institute of Fundamental Research
King Abdulaziz City for Science and Technology
The 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 Institute for Physics (Werner Heisenberg Institute)
National Central University
Hanyang University
RAS - P.N. Lebedev Physics Institute
Moscow Engineering Physics Institute
Korea Institute of Science and Technology Information
Sungkyunkwan University
Indian Institute of Technology Bhubaneswar
RAS - Budker Institute of Nuclear Physics
Novosibirsk State University
German Electron Synchrotron
Karlsruhe Institute of Technology
University of Ljubljana
Technical University of Munich

Research output: Contribution to journal › Article › peer-review

374 Scopus citations

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{2b81e1239d1a40f6b5c7e08d2612f9ae,

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{\texttimes}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 Kang, \{K. H.\} and Kim, \{M. J.\}",

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 - Kang, K. H.

AU - Kim, M. J.

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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