Measurement of the branching ratio Γ(Λb                             0→ψ(2S)Λ0)/Γ(Λb                             0→J/ψΛ0) with the ATLAS detector

ATLAS Collaboration

doi:10.1016/j.physletb.2015.10.009

Measurement of the branching ratio Γ(Λ_b ⁰→ψ(2S)Λ⁰)/Γ(Λ_b ⁰→J/ψΛ⁰) with the ATLAS detector

ATLAS Collaboration

Aix Marseille Université
University of Oklahoma
Academia Sinica, Institute Of Physics
Azerbaijan Academy of Sciences
University of Amsterdam
Michigan State University
University of Toronto
Tel Aviv University
Technion - Israel Institute of Technology
University of Oregon
Stockholm University
Oskar Klein Centre
INFN Sezione di Trieste
Abdus Salam International Centre for Theoretical Physics
King's College London
Agh University of Science and Technology Faculty of Computer Science
Brookhaven National Laboratory
Northern Illinois University
Universität München
Rutherford Appleton Laboratory
University of Liverpool
University of Belgrade
Georg-August-Universität Göttingen
Lisboa
University of Granada
Boston University
Joint Institute for Nuclear Research, Dubna
INFN Roma Tor Vergata
University of Rome “Tor Vergata”
Lund University
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
INFN Sezione di Bologna
University of Bologna
University of Victoria
LTHE (UMR 5564 CNRS/IRD/Université de Grenoble)
Instituto de Física La Plata
European Organization for Nuclear Research
Horia Hulubei National Institute of Physics and Nuclear Engineering
National Technical University of Athens
Sezione INFN di Milano
University of Chicago
Columbia University
University of Sussex
INFN Sezione di Napoli
University of Naples Federico II
Niels Bohr Institutet
Queen Mary University of London
University of Cambridge
Université Savoie Mont Blanc
University of Valencia
University of California, Berkeley
High Energy Accelerator Research Organization (KEK)
Instituto de Biofisica da UFRJ
Brandeis University
University of Michigan, Ann Arbor
University of Coimbra
Faculdade de Ciências, Universidade de Lisboa
University of Freiburg
The University of Sheffield
University of Geneva
University of Heidelberg
University of Milano
University of Athens
Technical University Dresden
Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
Novosibirsk State University
University of São Paulo
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
University of Pisa
LNF-INFN
National Research Nuclear University MEPhI
Institute of Experimental Physics Slovak Academy of Sciences
Sezione di Roma
University of Birmingham
Duke University
Universite de Montreal
c/o DESY
Bogazici University
Universidad Autónoma de Madrid
University Bonn
Institute for Theoretical and Experimental Physics
University of Tokyo
Comenius University
University of Illinois
Universität Siegen
Czech Technical University in Prague
University of Johannesburg
Laboratoire de l'Accélérateur Linéaire
TRIUMF
University Roma Tre
Universite Paris-Saclay
Aristotle University of Thessaloniki
University of Rome
Institute of High Energy Physics, Chinese Academy of Sciences
Yale University
Charles University
Stony Brook University
University of Manchester
Institute for Nuclear Physics
University of Wisconsin-Madison
Bergische Universität Gesamthochschule Wuppertal
University of Melbourne
Sezione di Genova
University of Genoa
Max-Planck-Institut für Physik
Stanford Linear Accelerator Center
University of Oxford
Harvard University
Lancaster University
Kurchatov Institute
University of Glasgow
University of California at Santa Cruz
California State University, Fresno
The Ohio State University
Universités Paris VI and VII
Tufts University
University of Bern
University of Fribourg
Johannes Gutenberg University
University of Warwick
Gaziantep University
McGill University
Carleton University
UMass Amherst
Université Hassan II
York University
Uppsala University
New York University
Royal Holloway University of London
University of Pittsburgh
Humboldt-Universität zu Berlin
University College London
University of Sydney
University of Washington
Argonne National Laboratory
Moscow State University
Kurchatov Institute
The Chinese University of Hong Kong
University of Hong Kong
The Hong Kong University of Science and Technology
State University of New York Albany
Clermont-Auvergne University
Oklahoma State University
University of Texas at Arlington
Tokyo Metropolitan University
and Physics University of Udine
University of Pennsylvania School of Arts and Sciences
Weizmann Institute of Science Israel
University of the Witwatersrand, Johannesburg
University of Edinburgh
Universidad Técnica Federico Santa María
University of Bergen
Simon Fraser University
University of Oslo
University of Dortmund
University of Alberta
University of Calabria
Ankara University
Shanghai Jiao Tong University
Southern Methodist University
Radboud University
Pontificia Universidad Católica de Chile
Ipatimup Diagnósticos
Federal University of Juiz de Fora (UFJF)
Dogus University
Tomsk State University
Iowa State University
Shandong University
Nanjing University
Tsinghua University
Kobe University
Faculté des Sciences Rabat
University of Arizona
Sezione di Lecce
Indiana University Bloomington
Institute of Physics of the Czech Academy of Sciences
Palacky University Olomouc
University of Ljubljana
INFN Sezione di Pavia
University of Pavia
Università di Napoli Parthenope
Institute of Particle Physics
Long Beach VA and University of California
University of British Columbia
Université Mohamed Premier
Tbilisi State University
Federal University of Sao Joao del Rei (UFSJ)
University of São Paulo
Justus-Liebig-Universität Giessen
Cadi Ayyad University
Osaka University
St. Petersburg State Polytechnical University
Nagasaki Institute of Applied Science
University of Science and Technology of China
Centre National de l'Energie des Sciences Techniques Nucleaires
Centro de Física Nuclear da Universidade de Lisboa
University of New Mexico
University of Salento
Louisiana Tech University
Pompeu Fabra University (UPF)
Yerevan Physics Institute
University of Cape Town
University of Tsukuba
B. I. Stepanov Institute of Physics
Shinshu University
Tokyo Institute of Technology
Nagoya University
National Centre for Particle and High Energy Physics
National Tsing Hua University
Waseda University
The University of Texas at Austin
Kyoto University
University of Texas
The University of Adelaide
Medical University of Innsbruck
Tbilisi State University
Ilia State University (ISU)
Kyushu University
Georgian Technical University
Manhattan College
Istanbul Aydin University
University of Würzburg
Hellenic Open University
Universidad Antonio Narino
KTH Royal Institute of Technology
University of Iowa
Hampton University
Moscow Institute of Physics and Technology
Hiroshima Institute of Technology
Okayama University
Universidade de Minho
Universidad de Buenos Aires
Jagiellonian University
International School of Advanced Studies
National Institute for Research and Development of Isotopic and Molecular Technologies
University of South Carolina
Université Paris-Sud
Sun Yat-Sen University
TOBB University of Economics and Technology
Kyoto University of Education
Massachusetts Institute of Technology
Stanford University
Wigner Research Centre for Physics
University Malaya

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

19 Citations (Scopus)

Résumé

An observation of the Λ_b ⁰→ψ(2S)Λ⁰ decay and a comparison of its branching fraction with that of the Λ_b ⁰→J/ψΛ⁰ decay has been made with the ATLAS detector in proton–proton collisions at s=8 TeV at the LHC using an integrated luminosity of 20.6 fb⁻¹. The J/ψ and ψ(2S) mesons are reconstructed in their decays to a muon pair, while the Λ⁰→pπ⁻ decay is exploited for the Λ⁰ baryon reconstruction. The Λ_b ⁰ baryons are reconstructed with transverse momentum p_T>10 GeV and pseudorapidity |η|<2.1. The measured branching ratio of the Λ_b ⁰→ψ(2S)Λ⁰ and Λ_b ⁰→J/ψΛ⁰ decays is Γ(Λ_b ⁰→ψ(2S)Λ⁰)/Γ(Λ_b ⁰→J/ψΛ⁰)=0.501±0.033(stat)±0.019(syst), lower than the expectation from the covariant quark model.

langue originale	Anglais
Pages (de - à)	63-80
Nombre de pages	18
journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	751
Les DOIs	https://doi.org/10.1016/j.physletb.2015.10.009
état	Publié - 17 déc. 2015
Modification externe	Oui

Accès au document

10.1016/j.physletb.2015.10.009

Contient cette citation

@article{c48c11e80a1e40848bb0dc836affcf8b,

title = "Measurement of the branching ratio Γ(Λb 0→ψ(2S)Λ0)/Γ(Λb 0→J/ψΛ0) with the ATLAS detector",

abstract = "An observation of the Λb 0→ψ(2S)Λ0 decay and a comparison of its branching fraction with that of the Λb 0→J/ψΛ0 decay has been made with the ATLAS detector in proton–proton collisions at s=8 TeV at the LHC using an integrated luminosity of 20.6 fb−1. The J/ψ and ψ(2S) mesons are reconstructed in their decays to a muon pair, while the Λ0→pπ− decay is exploited for the Λ0 baryon reconstruction. The Λb 0 baryons are reconstructed with transverse momentum pT>10 GeV and pseudorapidity |η|<2.1. The measured branching ratio of the Λb 0→ψ(2S)Λ0 and Λb 0→J/ψΛ0 decays is Γ(Λb 0→ψ(2S)Λ0)/Γ(Λb 0→J/ψΛ0)=0.501±0.033(stat)±0.019(syst), lower than the expectation from the covariant quark model.",

author = "\{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 J. Agricola 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 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 T. Mueller and O. Simard",

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

year = "2015",

month = dec,

day = "17",

doi = "10.1016/j.physletb.2015.10.009",

language = "English",

volume = "751",

pages = "63--80",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

Measurement of the branching ratio Γ(Λ_b ⁰→ψ(2S)Λ⁰)/Γ(Λ_b ⁰→J/ψΛ⁰) with the ATLAS detector. / ATLAS Collaboration.
Dans: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol 751, 17.12.2015, p. 63-80.

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

TY - JOUR

T1 - Measurement of the branching ratio Γ(Λb 0→ψ(2S)Λ0)/Γ(Λb 0→J/ψΛ0) with the ATLAS detector

AU - 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 - Agricola, J.

AU - Aguilar-Saavedra, J. A.

AU - Ahlen, S. P.

AU - Ahmadov, F.

AU - Aielli, G.

AU - Akerstedt, H.

AU - Åkesson, T. P.A.

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 - Mueller, T.

AU - Simard, O.

PY - 2015/12/17

Y1 - 2015/12/17

N2 - An observation of the Λb 0→ψ(2S)Λ0 decay and a comparison of its branching fraction with that of the Λb 0→J/ψΛ0 decay has been made with the ATLAS detector in proton–proton collisions at s=8 TeV at the LHC using an integrated luminosity of 20.6 fb−1. The J/ψ and ψ(2S) mesons are reconstructed in their decays to a muon pair, while the Λ0→pπ− decay is exploited for the Λ0 baryon reconstruction. The Λb 0 baryons are reconstructed with transverse momentum pT>10 GeV and pseudorapidity |η|<2.1. The measured branching ratio of the Λb 0→ψ(2S)Λ0 and Λb 0→J/ψΛ0 decays is Γ(Λb 0→ψ(2S)Λ0)/Γ(Λb 0→J/ψΛ0)=0.501±0.033(stat)±0.019(syst), lower than the expectation from the covariant quark model.

AB - An observation of the Λb 0→ψ(2S)Λ0 decay and a comparison of its branching fraction with that of the Λb 0→J/ψΛ0 decay has been made with the ATLAS detector in proton–proton collisions at s=8 TeV at the LHC using an integrated luminosity of 20.6 fb−1. The J/ψ and ψ(2S) mesons are reconstructed in their decays to a muon pair, while the Λ0→pπ− decay is exploited for the Λ0 baryon reconstruction. The Λb 0 baryons are reconstructed with transverse momentum pT>10 GeV and pseudorapidity |η|<2.1. The measured branching ratio of the Λb 0→ψ(2S)Λ0 and Λb 0→J/ψΛ0 decays is Γ(Λb 0→ψ(2S)Λ0)/Γ(Λb 0→J/ψΛ0)=0.501±0.033(stat)±0.019(syst), lower than the expectation from the covariant quark model.

U2 - 10.1016/j.physletb.2015.10.009

DO - 10.1016/j.physletb.2015.10.009

M3 - Article

AN - SCOPUS:85042517730

SN - 0370-2693

VL - 751

SP - 63

EP - 80

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Measurement of the branching ratio Γ(Λb 0→ψ(2S)Λ0)/Γ(Λb 0→J/ψΛ0) with the ATLAS detector

Résumé

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Contient cette citation

Measurement of the branching ratio Γ(Λ_b ⁰→ψ(2S)Λ⁰)/Γ(Λ_b ⁰→J/ψΛ⁰) with the ATLAS detector