Measurement of the Branching Fraction Ratios R(D^{+}) and R(D^{*+}) Using Muonic τ Decays

LHCb Collaboration

doi:10.1103/PhysRevLett.134.061801

Measurement of the Branching Fraction Ratios R(D^{+}) and R(D^{*+}) Using Muonic τ Decays

LHCb Collaboration

National Institute for Subatomic Physics
University of Warwick
University of Zurich
University of Liverpool
Syracuse University
University of Santiago de Compostela
University of Bristol
Uppsala University
Université Paris-Saclay
University of Michigan, Ann Arbor
Université Clermont Auvergne
University of Cincinnati
National Institute for Nuclear Physics
TU Dortmund University
CERN
University of Glasgow
University of Manchester
University of Cambridge
Sorbonne Université
Universidade Federal do Rio de Janeiro
Peking University
University of Chinese Academy of Sciences
Consejo Nacional de Rectores (CONARE)
CPPM
Massachusetts Institute of Technology
Laboratoire Leprince-Ringuet
University of Oxford
Université Savoie Mont Blanc
Heidelberg University
Swiss Federal Institute of Technology Lausanne
Pontifícia Universidade Católica do Rio de Janeiro
University of Edinburgh
RWTH Aachen University
CAS - Institute of High Energy Physics
Centro Brasileiro de Pesquisas Físicas
Ramon Llull University
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Imperial College London
Monash University
Tsinghua University
Central China Normal University
Max Planck Institute for Nuclear Physics
University College Dublin
Vrije Universiteit Amsterdam
AGH University of Krakow
National Centre for Nuclear Research
Horia Hulubei National Institute of Physics and Nuclear Engineering
University of Barcelona
University of Valencia
NASU - Kharkov Institute of Physics and Technology
NASU - Institute of Nuclear Research
University of Birmingham
Rutherford Appleton Laboratory
University of Maryland, College Park
Hunan University
South China Normal University
Lanzhou University
Wuhan University
University of Groningen
Cracow University of Technology
Departement de Physique Nucleaire (SPhN)
Maastricht University
University of A Coruna
Los Alamos National Laboratory
Eötvös Loránd University
Universidad Nacional de Colombia

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9 Citas (Scopus)

Resumen

The branching fraction ratios of B[over ¯]^{0}→D^{+}τ^{-}ν[over ¯]_{τ} and B[over ¯]^{0}→D^{*+}τ^{-}ν[over ¯]_{τ} decays are measured with respect to their muonic counterparts, using a data sample corresponding to an integrated luminosity of 2.0 fb^{-1} collected by the LHCb experiment in proton-proton collisions at sqrt[s]=13 TeV. The reconstructed final states are formed by combining D^{+} mesons with τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ} candidates, where the D^{+} is reconstructed via the D^{+}→K^{-}π^{+}π^{+} decay. The results are R(D^{+})=0.249±0.043±0.047, R(D^{*+})=0.402±0.081±0.085, where the first uncertainties are statistical and the second systematic. The two measurements have a correlation coefficient of -0.39 and are compatible with the standard model.

Idioma original	Inglés
Número de artículo	061801
Páginas (desde-hasta)	61801
Número de páginas	1
Publicación	Physical Review Letters
Volumen	134
N.º	6
DOI	https://doi.org/10.1103/PhysRevLett.134.061801
Estado	Publicada - 14 feb 2025
Publicado de forma externa	Sí

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10.1103/PhysRevLett.134.061801

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@article{b1ec006c894f44278a0fa7fb6c489e04,

title = "Measurement of the Branching Fraction Ratios R(D\textasciicircum{}\{+\}) and R(D\textasciicircum{}\{*+\}) Using Muonic τ Decays",

abstract = "The branching fraction ratios of B[over ¯]\textasciicircum{}\{0\}→D\textasciicircum{}\{+\}τ\textasciicircum{}\{-\}ν[over ¯]\_\{τ\} and B[over ¯]\textasciicircum{}\{0\}→D\textasciicircum{}\{*+\}τ\textasciicircum{}\{-\}ν[over ¯]\_\{τ\} decays are measured with respect to their muonic counterparts, using a data sample corresponding to an integrated luminosity of 2.0 fb\textasciicircum{}\{-1\} collected by the LHCb experiment in proton-proton collisions at sqrt[s]=13 TeV. The reconstructed final states are formed by combining D\textasciicircum{}\{+\} mesons with τ\textasciicircum{}\{-\}→μ\textasciicircum{}\{-\}ν[over ¯]\_\{μ\}ν\_\{τ\} candidates, where the D\textasciicircum{}\{+\} is reconstructed via the D\textasciicircum{}\{+\}→K\textasciicircum{}\{-\}π\textasciicircum{}\{+\}π\textasciicircum{}\{+\} decay. The results are R(D\textasciicircum{}\{+\})=0.249±0.043±0.047, R(D\textasciicircum{}\{*+\})=0.402±0.081±0.085, where the first uncertainties are statistical and the second systematic. The two measurements have a correlation coefficient of -0.39 and are compatible with the standard model.",

author = "\{LHCb Collaboration\} and R. Aaij and Abdelmotteleb, \{A. S.W.\} and \{Abellan Beteta\}, C. and F. Abudin{\'e}n and T. Ackernley and Adefisoye, \{A. A.\} and B. Adeva and M. Adinolfi and P. Adlarson and C. Agapopoulou and Aidala, \{C. A.\} and Z. Ajaltouni and S. Akar and K. Akiba and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and Z. Aliouche and \{Alvarez Cartelle\}, P. and R. Amalric and S. Amato and Amey, \{J. L.\} and Y. Amhis and L. An and L. Anderlini and M. Andersson and A. Andreianov and P. Andreola and M. Andreotti and D. Andreou and A. Anelli and D. Ao and F. Archilli and M. Argenton and \{Arguedas Cuendis\}, S. and A. Artamonov and M. Artuso and E. Aslanides and M. Atzeni and B. Audurier and D. Bacher and \{Bachiller Perea\}, I. and S. Bachmann and M. Bachmayer and Back, \{J. J.\} and \{Baladron Rodriguez\}, P. and V. Balagura and \{Calderon Ramirez\}, S. and \{Castro Godinez\}, J.",

note = "Publisher Copyright: {\textcopyright} 2025 CERN, for the LHCb Collaboration.",

year = "2025",

month = feb,

day = "14",

doi = "10.1103/PhysRevLett.134.061801",

language = "Ingl{\'e}s",

volume = "134",

pages = "61801",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "6",

}

TY - JOUR

T1 - Measurement of the Branching Fraction Ratios R(D^{+}) and R(D^{*+}) Using Muonic τ Decays

AU - LHCb Collaboration

AU - Aaij, R.

AU - Abdelmotteleb, A. S.W.

AU - Abellan Beteta, C.

AU - Abudinén, F.

AU - Ackernley, T.

AU - Adefisoye, A. A.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adlarson, P.

AU - Agapopoulou, C.

AU - Aidala, C. A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Akiba, K.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Aliouche, Z.

AU - Alvarez Cartelle, P.

AU - Amalric, R.

AU - Amato, S.

AU - Amey, J. L.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andersson, M.

AU - Andreianov, A.

AU - Andreola, P.

AU - Andreotti, M.

AU - Andreou, D.

AU - Anelli, A.

AU - Ao, D.

AU - Archilli, F.

AU - Argenton, M.

AU - Arguedas Cuendis, S.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bacher, D.

AU - Bachiller Perea, I.

AU - Bachmann, S.

AU - Bachmayer, M.

AU - Back, J. J.

AU - Baladron Rodriguez, P.

AU - Balagura, V.

AU - Calderon Ramirez, S.

AU - Castro Godinez, J.

PY - 2025/2/14

Y1 - 2025/2/14

N2 - The branching fraction ratios of B[over ¯]^{0}→D^{+}τ^{-}ν[over ¯]_{τ} and B[over ¯]^{0}→D^{*+}τ^{-}ν[over ¯]_{τ} decays are measured with respect to their muonic counterparts, using a data sample corresponding to an integrated luminosity of 2.0 fb^{-1} collected by the LHCb experiment in proton-proton collisions at sqrt[s]=13 TeV. The reconstructed final states are formed by combining D^{+} mesons with τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ} candidates, where the D^{+} is reconstructed via the D^{+}→K^{-}π^{+}π^{+} decay. The results are R(D^{+})=0.249±0.043±0.047, R(D^{*+})=0.402±0.081±0.085, where the first uncertainties are statistical and the second systematic. The two measurements have a correlation coefficient of -0.39 and are compatible with the standard model.

AB - The branching fraction ratios of B[over ¯]^{0}→D^{+}τ^{-}ν[over ¯]_{τ} and B[over ¯]^{0}→D^{*+}τ^{-}ν[over ¯]_{τ} decays are measured with respect to their muonic counterparts, using a data sample corresponding to an integrated luminosity of 2.0 fb^{-1} collected by the LHCb experiment in proton-proton collisions at sqrt[s]=13 TeV. The reconstructed final states are formed by combining D^{+} mesons with τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ} candidates, where the D^{+} is reconstructed via the D^{+}→K^{-}π^{+}π^{+} decay. The results are R(D^{+})=0.249±0.043±0.047, R(D^{*+})=0.402±0.081±0.085, where the first uncertainties are statistical and the second systematic. The two measurements have a correlation coefficient of -0.39 and are compatible with the standard model.

UR - https://www.scopus.com/pages/publications/85217850752

U2 - 10.1103/PhysRevLett.134.061801

DO - 10.1103/PhysRevLett.134.061801

M3 - Artículo

C2 - 40021149

AN - SCOPUS:85217850752

SN - 0031-9007

VL - 134

SP - 61801

JO - Physical Review Letters

JF - Physical Review Letters

IS - 6

M1 - 061801

ER -

Measurement of the Branching Fraction Ratios R(D^{+}) and R(D^{*+}) Using Muonic τ Decays

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