Observation of Bs                      0 mesons and measurement of the Bs                      0/B+ yield ratio in PbPb collisions at [Formula presented] TeV

The CMS collaboration

doi:10.1016/j.physletb.2022.137062

Observation of B_s ⁰ mesons and measurement of the B_s ⁰/B⁺ yield ratio in PbPb collisions at [Formula presented] TeV

The CMS collaboration

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

13 Scopus citations

Abstract

The B_s ⁰ and B⁺ production yields are measured in PbPb collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The data sample, collected with the CMS detector at the LHC, corresponds to an integrated luminosity of 1.7 nb⁻¹. The mesons are reconstructed in the exclusive decay channels B→s0J/ψ(μ⁺μ⁻)ϕ(K⁺K⁻) and B→+J/ψ(μ⁺μ⁻)K⁺, in the transverse momentum range 7–50 GeV/c and absolute rapidity 0–2.4. The B_s ⁰ meson is observed with a statistical significance in excess of five standard deviations for the first time in nucleus-nucleus collisions. The measurements are performed as functions of the transverse momentum of the B mesons and of the PbPb collision centrality. The ratio of production yields of B_s ⁰ and B⁺ is measured and compared to theoretical models that include quark recombination effects.

Original language	English (US)
Article number	137062
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	829
DOIs	https://doi.org/10.1016/j.physletb.2022.137062
State	Published - Jun 10 2022

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

Keywords

B mesons
CMS
Hadronization
Heavy flavor
Quark gluon plasma

Access to Document

10.1016/j.physletb.2022.137062

Cite this

@article{72e401651cc04bf2951d09faf158b129,

title = "Observation of Bs 0 mesons and measurement of the Bs 0/B+ yield ratio in PbPb collisions at [Formula presented] TeV",

abstract = "The Bs 0 and B+ production yields are measured in PbPb collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The data sample, collected with the CMS detector at the LHC, corresponds to an integrated luminosity of 1.7 nb−1. The mesons are reconstructed in the exclusive decay channels B→s0J/ψ(μ+μ−)ϕ(K+K−) and B→+J/ψ(μ+μ−)K+, in the transverse momentum range 7–50 GeV/c and absolute rapidity 0–2.4. The Bs 0 meson is observed with a statistical significance in excess of five standard deviations for the first time in nucleus-nucleus collisions. The measurements are performed as functions of the transverse momentum of the B mesons and of the PbPb collision centrality. The ratio of production yields of Bs 0 and B+ is measured and compared to theoretical models that include quark recombination effects.",

keywords = "B mesons, CMS, Hadronization, Heavy flavor, Quark gluon plasma",

author = "{The CMS collaboration} and A. Tumasyan and W. Adam and F. Ambrogi and T. Bergauer and M. Dragicevic and J. Er{\"o} and {Escalante Del Valle}, A. and R. Fr{\"u}hwirth and M. Jeitler and N. Krammer and L. Lechner and D. Liko and T. Madlener and I. Mikulec and Pitters, {F. M.} and N. Rad and J. Schieck and R. Sch{\"o}fbeck and M. Spanring and S. Templ and W. Waltenberger and Wulz, {C. E.} and M. Zarucki and V. Chekhovsky and A. Litomin and V. Makarenko and {Suarez Gonzalez}, J. and Darwish, {M. R.} and {De Wolf}, {E. A.} and {Di Croce}, D. and X. Janssen and T. Kello and A. Lelek and M. Pieters and {Rejeb Sfar}, H. 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 D. Lontkovskyi and I. Marchesini and D. Lange and I. Ojalvo and J. Olsen and Stickland, {David Peter} and C. Tully",

note = "Publisher Copyright: {\textcopyright} 2022 The Author(s)",

year = "2022",

month = jun,

day = "10",

doi = "10.1016/j.physletb.2022.137062",

language = "English (US)",

volume = "829",

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

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Observation of Bs 0 mesons and measurement of the Bs 0/B+ yield ratio in PbPb collisions at [Formula presented] TeV

AU - The CMS collaboration

AU - Tumasyan, A.

AU - Adam, W.

AU - Ambrogi, F.

AU - Bergauer, T.

AU - Dragicevic, M.

AU - Erö, J.

AU - Escalante Del Valle, A.

AU - Frühwirth, R.

AU - Jeitler, M.

AU - Krammer, N.

AU - Lechner, L.

AU - Liko, D.

AU - Madlener, T.

AU - Mikulec, I.

AU - Pitters, F. M.

AU - Rad, N.

AU - Schieck, J.

AU - Schöfbeck, R.

AU - Spanring, M.

AU - Templ, S.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Zarucki, M.

AU - Chekhovsky, V.

AU - Litomin, A.

AU - Makarenko, V.

AU - Suarez Gonzalez, J.

AU - Darwish, M. R.

AU - De Wolf, E. A.

AU - Di Croce, D.

AU - Janssen, X.

AU - Kello, T.

AU - Lelek, A.

AU - Pieters, M.

AU - Rejeb Sfar, 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 - Lontkovskyi, D.

AU - Marchesini, I.

AU - Lange, D.

AU - Ojalvo, I.

AU - Olsen, J.

AU - Stickland, David Peter

AU - Tully, C.

PY - 2022/6/10

Y1 - 2022/6/10

N2 - The Bs 0 and B+ production yields are measured in PbPb collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The data sample, collected with the CMS detector at the LHC, corresponds to an integrated luminosity of 1.7 nb−1. The mesons are reconstructed in the exclusive decay channels B→s0J/ψ(μ+μ−)ϕ(K+K−) and B→+J/ψ(μ+μ−)K+, in the transverse momentum range 7–50 GeV/c and absolute rapidity 0–2.4. The Bs 0 meson is observed with a statistical significance in excess of five standard deviations for the first time in nucleus-nucleus collisions. The measurements are performed as functions of the transverse momentum of the B mesons and of the PbPb collision centrality. The ratio of production yields of Bs 0 and B+ is measured and compared to theoretical models that include quark recombination effects.

AB - The Bs 0 and B+ production yields are measured in PbPb collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The data sample, collected with the CMS detector at the LHC, corresponds to an integrated luminosity of 1.7 nb−1. The mesons are reconstructed in the exclusive decay channels B→s0J/ψ(μ+μ−)ϕ(K+K−) and B→+J/ψ(μ+μ−)K+, in the transverse momentum range 7–50 GeV/c and absolute rapidity 0–2.4. The Bs 0 meson is observed with a statistical significance in excess of five standard deviations for the first time in nucleus-nucleus collisions. The measurements are performed as functions of the transverse momentum of the B mesons and of the PbPb collision centrality. The ratio of production yields of Bs 0 and B+ is measured and compared to theoretical models that include quark recombination effects.

KW - B mesons

KW - CMS

KW - Hadronization

KW - Heavy flavor

KW - Quark gluon plasma

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UR - http://www.scopus.com/inward/citedby.url?scp=85129387077&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2022.137062

DO - 10.1016/j.physletb.2022.137062

M3 - Article

AN - SCOPUS:85129387077

SN - 0370-2693

VL - 829

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 - 137062

ER -