Study of the Bc+ → J/ψDs+ and Bc+ →J/ψD*s+ decays with the ATLAS detector

The ATLAS collaboration

doi:10.1140/epjc/s10052-015-3743-8

Study of the Bc+ → J/ψDs+ and Bc+ →J/ψD*s+ decays with the ATLAS detector

The ATLAS collaboration

University at Buffalo, University at Albany, Stony Brook University

Hong Kong University of Science and Technology
McGill University
University of Pennsylvania
National and Kapodistrian University of Athens
Lund University
Joint Institute for Nuclear Research
University of Coimbra
National Institute for Nuclear Physics
Nuclear Physics Institute
Universidade Federal de Juiz de Fora
The University of Osaka
Czech Technical University in Prague
King's College London
Universidad de Buenos Aires
University of Bologna
Universidad Autónoma de Madrid
University of Liverpool
University of Glasgow
Azerbaijan National Academy of Sciences
Lomonosov Moscow State University
Gaziantep University
University of Edinburgh
University of New Mexico
Heidelberg University
University of Pittsburgh
Instituto de Física La Plata
University of Birmingham
University of Rome La Sapienza
University of Calabria
Ivane Javakhishvili Tbilisi State University
University of Bonn
University of Texas at Arlington
High Energy Accelerator Research Organization, Tsukuba
Universidade Federal de São João del-Rei
National Institute for Research and Development of Isotopic and Molecular Technologies
Humboldt University of Berlin
University College London
National University of Science and Technology POLITEHNICA Bucharest
Université Grenoble Alpes
McGill University
University of Pennsylvania
National and Kapodistrian University of Athens
Lund University
Joint Institute for Nuclear Research
National Institute for Nuclear Physics
Petersburg Nuclear Physics Institute (PNPI)
Czech Technical University in Prague
King's College London
University of Bologna
University of Liverpool
Azerbaijan National Academy of Sciences
University of Birmingham
University of Bonn
McGill University
University of Pennsylvania
National and Kapodistrian University of Athens
Lund University
Joint Institute for Nuclear Research
National Institute for Nuclear Physics
Czech Technical University in Prague
King's College London
University of Bologna
University of Liverpool
Azerbaijan National Academy of Sciences
University of Birmingham
University of Bonn

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

33 Scopus citations

Abstract

The decays (Formula presented.) and (Formula presented.) are studied with the ATLAS detector at the LHC using a dataset corresponding to integrated luminosities of 4.9 and 20.6 fb^-1 of pp collisions collected at centre-of-mass energies (Formula presented.) TeV and 8 TeV, respectively. Signal candidates are identified through (Formula presented.) and (Formula presented.) decays. With a two-dimensional likelihood fit involving the (Formula presented.) reconstructed invariant mass and an angle between the (Formula presented.) candidate momenta in the muon pair rest frame, the yields of (Formula presented.) and (Formula presented.), and the transverse polarisation fraction in (Formula presented.) decay are measured. The transverse polarisation fraction is determined to be (Formula presented.) = 0.38 \pm 0.23 \pm 0.07(Formula presented.), and the derived ratio of the branching fractions of the two modes is (Formula presented.), where the first error is statistical and the second is systematic. Finally, a sample of (Formula presented.) decays is used to derive the ratios of branching fractions (Formula presented.) and (Formula presented.) = 10.4 \pm 3.1 \pm 1.5 \pm 0.6(Formula presented.), where the third error corresponds to the uncertainty of the branching fraction of (Formula presented.) decay. The available theoretical predictions are generally consistent with the measurement.

Original language	English
Article number	4
Pages (from-to)	1-24
Number of pages	24
Journal	European Physical Journal C
Volume	76
Issue number	1
DOIs	https://doi.org/10.1140/epjc/s10052-015-3743-8
State	Published - Jan 1 2016

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10.1140/epjc/s10052-015-3743-8

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@article{e8835df8630640a691cd8e965190ae72,

title = "Study of the Bc+ → J/ψDs+ and Bc+ →J/ψD*s+ decays with the ATLAS detector",

abstract = "The decays (Formula presented.) and (Formula presented.) are studied with the ATLAS detector at the LHC using a dataset corresponding to integrated luminosities of 4.9 and 20.6 fb-1 of pp collisions collected at centre-of-mass energies (Formula presented.) TeV and 8 TeV, respectively. Signal candidates are identified through (Formula presented.) and (Formula presented.) decays. With a two-dimensional likelihood fit involving the (Formula presented.) reconstructed invariant mass and an angle between the (Formula presented.) candidate momenta in the muon pair rest frame, the yields of (Formula presented.) and (Formula presented.), and the transverse polarisation fraction in (Formula presented.) decay are measured. The transverse polarisation fraction is determined to be (Formula presented.) = 0.38 \textbackslash{}pm 0.23 \textbackslash{}pm 0.07(Formula presented.), and the derived ratio of the branching fractions of the two modes is (Formula presented.), where the first error is statistical and the second is systematic. Finally, a sample of (Formula presented.) decays is used to derive the ratios of branching fractions (Formula presented.) and (Formula presented.) = 10.4 \textbackslash{}pm 3.1 \textbackslash{}pm 1.5 \textbackslash{}pm 0.6(Formula presented.), where the third error corresponds to the uncertainty of the branching fraction of (Formula presented.) decay. The available theoretical predictions are generally consistent with the measurement.",

author = "\{The ATLAS collaboration\} and G. Aad and B. Abbott and J. Abdallah and O. Abdinov and R. Aben and M. Abolins and AbouZeid, \{O. S.\} and H. Abramowicz and H. Abreu and R. Abreu and Y. Abulaiti and Acharya, \{B. S.\} and L. Adamczyk and Adams, \{D. L.\} and J. Adelman and S. Adomeit and T. Adye and Affolder, \{A. A.\} and T. Agatonovic-Jovin and Aguilar-Saavedra, \{J. A.\} and Ahlen, \{S. P.\} and F. Ahmadov and G. Aielli and H. Akerstedt and {\AA}kesson, \{T. P.A.\} and G. Akimoto and Akimov, \{A. V.\} and Alberghi, \{G. L.\} and J. Albert and S. Albrand and \{Alconada Verzini\}, \{M. J.\} and M. Aleksa and Aleksandrov, \{I. N.\} and C. Alexa and G. Alexander and T. Alexopoulos and M. Alhroob and G. Alimonti and L. Alio and J. Alison and Alkire, \{S. P.\} and Allbrooke, \{B. M.M.\} and Allport, \{P. P.\} and A. Aloisio and A. Alonso and F. Alonso and C. Alpigiani and A. Altheimer and \{Alvarez Gonzalez\}, B. and Nguyen, \{D. H.\} and J. Ernst and V. Jain and H. Arnold and \{Da Via\}, C. and V. Dao and J. Hobbs and J. Jia and G. Piacquadio and D. Tsybychev",

note = "Publisher Copyright: {\textcopyright} 2015, CERN for the benefit of the ATLAS collaboration.",

year = "2016",

month = jan,

day = "1",

doi = "10.1140/epjc/s10052-015-3743-8",

language = "English",

volume = "76",

pages = "1--24",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "1",

}

TY - JOUR

T1 - Study of the Bc+ → J/ψDs+ and Bc+ →J/ψD*s+ decays with the ATLAS detector

AU - The ATLAS collaboration

AU - Aad, G.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdinov, O.

AU - Aben, R.

AU - Abolins, M.

AU - AbouZeid, O. S.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abreu, R.

AU - Abulaiti, Y.

AU - Acharya, B. S.

AU - Adamczyk, L.

AU - Adams, D. L.

AU - Adelman, J.

AU - Adomeit, S.

AU - Adye, T.

AU - Affolder, A. A.

AU - Agatonovic-Jovin, T.

AU - Aguilar-Saavedra, J. A.

AU - Ahlen, S. P.

AU - Ahmadov, F.

AU - Aielli, G.

AU - Akerstedt, H.

AU - Åkesson, T. P.A.

AU - Akimoto, G.

AU - Akimov, A. V.

AU - Alberghi, G. L.

AU - Albert, J.

AU - Albrand, S.

AU - Alconada Verzini, M. J.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alexa, C.

AU - Alexander, G.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - Alimonti, G.

AU - Alio, L.

AU - Alison, J.

AU - Alkire, S. P.

AU - Allbrooke, B. M.M.

AU - Allport, P. P.

AU - Aloisio, A.

AU - Alonso, A.

AU - Alonso, F.

AU - Alpigiani, C.

AU - Altheimer, A.

AU - Alvarez Gonzalez, B.

AU - Nguyen, D. H.

AU - Ernst, J.

AU - Jain, V.

AU - Arnold, H.

AU - Da Via, C.

AU - Dao, V.

AU - Hobbs, J.

AU - Jia, J.

AU - Piacquadio, G.

AU - Tsybychev, D.

PY - 2016/1/1

Y1 - 2016/1/1

N2 - The decays (Formula presented.) and (Formula presented.) are studied with the ATLAS detector at the LHC using a dataset corresponding to integrated luminosities of 4.9 and 20.6 fb-1 of pp collisions collected at centre-of-mass energies (Formula presented.) TeV and 8 TeV, respectively. Signal candidates are identified through (Formula presented.) and (Formula presented.) decays. With a two-dimensional likelihood fit involving the (Formula presented.) reconstructed invariant mass and an angle between the (Formula presented.) candidate momenta in the muon pair rest frame, the yields of (Formula presented.) and (Formula presented.), and the transverse polarisation fraction in (Formula presented.) decay are measured. The transverse polarisation fraction is determined to be (Formula presented.) = 0.38 \pm 0.23 \pm 0.07(Formula presented.), and the derived ratio of the branching fractions of the two modes is (Formula presented.), where the first error is statistical and the second is systematic. Finally, a sample of (Formula presented.) decays is used to derive the ratios of branching fractions (Formula presented.) and (Formula presented.) = 10.4 \pm 3.1 \pm 1.5 \pm 0.6(Formula presented.), where the third error corresponds to the uncertainty of the branching fraction of (Formula presented.) decay. The available theoretical predictions are generally consistent with the measurement.

AB - The decays (Formula presented.) and (Formula presented.) are studied with the ATLAS detector at the LHC using a dataset corresponding to integrated luminosities of 4.9 and 20.6 fb-1 of pp collisions collected at centre-of-mass energies (Formula presented.) TeV and 8 TeV, respectively. Signal candidates are identified through (Formula presented.) and (Formula presented.) decays. With a two-dimensional likelihood fit involving the (Formula presented.) reconstructed invariant mass and an angle between the (Formula presented.) candidate momenta in the muon pair rest frame, the yields of (Formula presented.) and (Formula presented.), and the transverse polarisation fraction in (Formula presented.) decay are measured. The transverse polarisation fraction is determined to be (Formula presented.) = 0.38 \pm 0.23 \pm 0.07(Formula presented.), and the derived ratio of the branching fractions of the two modes is (Formula presented.), where the first error is statistical and the second is systematic. Finally, a sample of (Formula presented.) decays is used to derive the ratios of branching fractions (Formula presented.) and (Formula presented.) = 10.4 \pm 3.1 \pm 1.5 \pm 0.6(Formula presented.), where the third error corresponds to the uncertainty of the branching fraction of (Formula presented.) decay. The available theoretical predictions are generally consistent with the measurement.

UR - https://www.scopus.com/pages/publications/84953865617

U2 - 10.1140/epjc/s10052-015-3743-8

DO - 10.1140/epjc/s10052-015-3743-8

M3 - Article

SN - 1434-6044

VL - 76

SP - 1

EP - 24

JO - European Physical Journal C

JF - European Physical Journal C

IS - 1

M1 - 4

ER -

Study of the Bc+ → J/ψDs+ and Bc+ →J/ψD*s+ decays with the ATLAS detector

Abstract

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