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

Yerevan Physics Institute
Institut für Hochenergiephysik
University of Antwerp
Vrjie Universiteit Brussel
Saha Institute of Nuclear Physics
Bhabha Atomic Research Centre
Institute for Research in Fundamental Sciences (IPM)
University College Dublin
INFN Sezione di Bari
Università degli studi di Bari Aldo Moro
Florida International University

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

11 Citations (Scopus)

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

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@article{3c4c96a220eb4e59b2c936945f7ddfd5,

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)){\texttimes}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 F. Beaudette and R. Granierdecassagnac and C. Ochando and P. Paganini and A. Zabi and A. Zghiche and A. Cappati",

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",

publisher = "Elsevier B.V.",

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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 - Beaudette, F.

AU - Granierdecassagnac, R.

AU - Ochando, C.

AU - Paganini, P.

AU - Zabi, A.

AU - Zghiche, A.

AU - Cappati, A.

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

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

Abstract

Keywords

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Cite this

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