Observation of the Λb                      0→J/ψΛϕ decay in proton-proton collisions at s=13TeV

The CMS collaboration

doi:10.1016/j.physletb.2020.135203

Observation of the Λ_b ⁰→J/ψΛϕ decay in proton-proton collisions at s=13TeV

The CMS collaboration

A. Alikhanian Yerevan Institute of Physics
Austrian Academy of Sciences
University of Antwerp
Vrije Universiteit Brussel
Université libre de Bruxelles
Ghent University
Université catholique de Louvain
Centro Brasileiro de Pesquisas Físicas
Universidade do Estado do Rio de Janeiro
Universidade Estadual Paulista Júlio de Mesquita Filho
Universidade Federal do ABC
Bulgarian Academy of Sciences
Sofia University St. Kliment Ohridski
Beihang University
CAS - Institute of High Energy Physics
Peking University
Tsinghua University
Zhejiang University
Universidad de los Andes Colombia
Universidad de Antioquia
University of Split
Ruder Boskovic Institute
University of Cyprus
Charles University
Escuela Politécnica Nacional
Universidad San Francisco de Quito
Academy of Scientific Research and Technology
National Institute of Chemical Physics and Biophysics, Tallinn
University of Helsinki
Helsinki Institute of Physics
Lappeenranta-Lahti University of Technology
Université Paris-Saclay
IN2P3-CNRS
Institut Pluridisciplinaire - Hubert Curien (IPHC)
CNRS/IN2P3-Univ Mediterranee
Université de Lyon
Georgian Technical University
Ivane Javakhishvili Tbilisi State University
RWTH Aachen University
German Electron Synchrotron
University of Hamburg
Karlsruhe Institute of Technology
Demokritos National Centre for Scientific Research
National and Kapodistrian University of Athens
National Technical University of Athens
University of Ioannina
Eötvös Loránd University
Wigner Research Centre for Physics
Institute for Nuclear Research
University of Debrecen
Eszterhazy Karoly University
Indian Institute of Science Bangalore
National Institute of Science Education and Research
Panjab University
University of Delhi
Saha Institute of Nuclear Physics
Indian Institute of Technology Madras
Bhabha Atomic Research Centre
Tata Institute of Fundamental Research
Indian Institute of Science Education and Research Pune
Institute for Research for Fundamental Sciences
University College Dublin
National Institute for Nuclear Physics
University of Bari
Polytechnic University of Bari
University of Bologna
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University of Florence
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Scuola Normale Superiore di Pisa
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Benemerita Universidad Autonoma de Puebla
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University of Montenegro
The University of Auckland
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AGH University of Krakow
National Centre for Nuclear Research
University of Warsaw
Laboratório de Instrumentação e Física Experimental de Partículas
Joint Institute for Nuclear Research
RAS - Saint Petersburg Nuclear Physics Institute
RAS - Institute for Nuclear Research
Alikhanov Institute for Theoretical and Experimental Physics
Moscow Institute of Physics and Technology
Moscow Engineering Physics Institute
RAS - P.N. Lebedev Physics Institute
Lomonosov Moscow State University
Novosibirsk State University
Institute for High Energy Physics
Tomsk Polytechnic University
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University of Belgrade
CIEMAT
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University of Oviedo
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NASU - Institute for Single Crystals
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University of Bristol
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Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile
Centro Siciliano di Fisica Nucleare e di Struttura Della Materia
Consejo Nacional de Ciencia y Tecnología
Consejo Nacional de Ciencia y Tecnologia Mexico
Warsaw University of Technology
Peter the Great St. Petersburg Polytechnic University
RAS - Budker Institute of Nuclear Physics
Texas A&M University at Qatar
University of Siena
Mehmet Akif Ersoy University
Sirnak University
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Mersin University
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University of Southampton
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Monash University
Bethel University
Karamanoglu Mehmetbey University
Bingol University
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Abstract

The observation of the Λ_b ⁰→J/ψΛϕ decay is reported using proton-proton collision data collected at s=13TeV by the CMS experiment at the LHC in 2018, corresponding to an integrated luminosity of 60fb⁻¹. The ratio of the branching fractions B(Λ_b ⁰→J/ψΛϕ)/B(Λ_b ⁰→ψ(2S)Λ) is measured to be (8.26±0.90(stat)±0.68(syst)±0.11(B))×10⁻², where the first uncertainty is statistical, the second is systematic, and the last uncertainty reflects the uncertainties in the world-average branching fractions of ϕ and ψ(2S) decays to the reconstructed final states.

Original language	English
Article number	135203
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	802
DOIs	https://doi.org/10.1016/j.physletb.2020.135203
Publication status	Published - 10 Mar 2020
Externally published	Yes

Keywords

CMS
Computing
Heavy-flavor spectroscopy
b physics

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10.1016/j.physletb.2020.135203

Cite this

@article{35001b0e50574b33a97527fbbc8c977c,

title = "Observation of the Λb 0→J/ψΛϕ decay in proton-proton collisions at s=13TeV",

abstract = "The observation of the Λb 0→J/ψΛϕ decay is reported using proton-proton collision data collected at s=13TeV by the CMS experiment at the LHC in 2018, corresponding to an integrated luminosity of 60fb−1. The ratio of the branching fractions B(Λb 0→J/ψΛϕ)/B(Λb 0→ψ(2S)Λ) is measured to be (8.26±0.90(stat)±0.68(syst)±0.11(B))×10−2, where the first uncertainty is statistical, the second is systematic, and the last uncertainty reflects the uncertainties in the world-average branching fractions of ϕ and ψ(2S) decays to the reconstructed final states.",

keywords = "CMS, Computing, Heavy-flavor spectroscopy, b physics",

author = "\{The CMS collaboration\} and Sirunyan, \{A. M.\} and A. Tumasyan and W. Adam and F. Ambrogi and T. Bergauer and M. Dragicevic and J. Er{\"o} and A. Escalantedelvalle and M. Flechl and R. Fr{\"u}hwirth and M. Jeitler and N. Krammer and I. Kr{\"a}tschmer and D. Liko and T. Madlener and I. Mikulec and N. Rad and J. Schieck and R. Sch{\"o}fbeck and M. Spanring and W. Waltenberger and Wulz, \{C. E.\} and M. Zarucki and V. Drugakov and V. Mossolov and J. Suarezgonzalez and Darwish, \{M. R.\} and Dewolf, \{E. A.\} and D. Dicroce and X. Janssen and A. Lelek and M. Pieters and H. Rejebsfar and \{Van haevermaet\}, H. and \{Van mechelen\}, P. and \{Van putte\}, S. and \{Van remortel\}, N. and F. Blekman and Bols, \{E. S.\} and Chhibra, \{S. S.\} and J. D'hondt and J. Declercq and D. Lontkovskyi and S. Lowette and I. Marchesini and S. Moortgat and Q. Python and K. Skovpen and S. Tavernier and \{Van doninck\}, W.",

note = "Publisher Copyright: {\textcopyright} 2020 The Author",

year = "2020",

month = mar,

day = "10",

doi = "10.1016/j.physletb.2020.135203",

language = "English",

volume = "802",

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

issn = "0370-2693",

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TY - JOUR

T1 - Observation of the Λb 0→J/ψΛϕ decay in proton-proton collisions at s=13TeV

AU - The CMS collaboration

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Ambrogi, F.

AU - Bergauer, T.

AU - Dragicevic, M.

AU - Erö, J.

AU - Escalantedelvalle, A.

AU - Flechl, M.

AU - Frühwirth, R.

AU - Jeitler, M.

AU - Krammer, N.

AU - Krätschmer, I.

AU - Liko, D.

AU - Madlener, T.

AU - Mikulec, I.

AU - Rad, N.

AU - Schieck, J.

AU - Schöfbeck, R.

AU - Spanring, M.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Zarucki, M.

AU - Drugakov, V.

AU - Mossolov, V.

AU - Suarezgonzalez, J.

AU - Darwish, M. R.

AU - Dewolf, E. A.

AU - Dicroce, D.

AU - Janssen, X.

AU - Lelek, A.

AU - Pieters, M.

AU - Rejebsfar, H.

AU - Van haevermaet, H.

AU - Van mechelen, P.

AU - Van putte, S.

AU - Van remortel, N.

AU - Blekman, F.

AU - Bols, E. S.

AU - Chhibra, S. S.

AU - D'hondt, J.

AU - Declercq, J.

AU - Lontkovskyi, D.

AU - Lowette, S.

AU - Marchesini, I.

AU - Moortgat, S.

AU - Python, Q.

AU - Skovpen, K.

AU - Tavernier, S.

AU - Van doninck, W.

PY - 2020/3/10

Y1 - 2020/3/10

N2 - The observation of the Λb 0→J/ψΛϕ decay is reported using proton-proton collision data collected at s=13TeV by the CMS experiment at the LHC in 2018, corresponding to an integrated luminosity of 60fb−1. The ratio of the branching fractions B(Λb 0→J/ψΛϕ)/B(Λb 0→ψ(2S)Λ) is measured to be (8.26±0.90(stat)±0.68(syst)±0.11(B))×10−2, where the first uncertainty is statistical, the second is systematic, and the last uncertainty reflects the uncertainties in the world-average branching fractions of ϕ and ψ(2S) decays to the reconstructed final states.

AB - The observation of the Λb 0→J/ψΛϕ decay is reported using proton-proton collision data collected at s=13TeV by the CMS experiment at the LHC in 2018, corresponding to an integrated luminosity of 60fb−1. The ratio of the branching fractions B(Λb 0→J/ψΛϕ)/B(Λb 0→ψ(2S)Λ) is measured to be (8.26±0.90(stat)±0.68(syst)±0.11(B))×10−2, where the first uncertainty is statistical, the second is systematic, and the last uncertainty reflects the uncertainties in the world-average branching fractions of ϕ and ψ(2S) decays to the reconstructed final states.

KW - CMS

KW - Computing

KW - Heavy-flavor spectroscopy

KW - b physics

UR - https://www.scopus.com/pages/publications/85078529004

U2 - 10.1016/j.physletb.2020.135203

DO - 10.1016/j.physletb.2020.135203

M3 - Article

AN - SCOPUS:85078529004

SN - 0370-2693

VL - 802

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

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

M1 - 135203

ER -

Observation of the Λ_b ⁰→J/ψΛϕ decay in proton-proton collisions at s=13TeV

Abstract

Keywords

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