Observation of prompt J/ψ meson elliptic flow in high-multiplicity pPb collisions at √sNN=8.16 TeV

The CMS Collaboration; E-mail address: cms-publication-committee-chair@cern.ch

doi:10.1016/j.physletb.2019.02.018

Observation of prompt J/ψ meson elliptic flow in high-multiplicity pPb collisions at √s_NN=8.16 TeV

The CMS Collaboration, E-mail address: cms-publication-committee-chair@cern.ch

Physics and Astronomy (Twin Cities)

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

35 Scopus citations

Abstract

A measurement of the elliptic flow (v₂) of prompt J/ψ mesons in high-multiplicity pPb collisions is reported using data collected by the CMS experiment at a nucleon-nucleon center-of-mass energy s_NN=8.16TeV. Prompt J/ψ mesons decaying into two muons are reconstructed in the rapidity region in the nucleon-nucleon center-of-mass frame (y_cm), corresponding to either −2.86<y_cm<−1.86 or 0.94<y_cm<1.94. The average v₂ result from the two rapidity ranges is reported over the transverse momentum (p_T) range from 0.2 to 10 GeV. Positive v₂ values are observed for the prompt J/ψ meson, as extracted from long-range two-particle correlations with charged hadrons, for 2<p_T<8 GeV. The prompt J/ψ results are compared with previous CMS measurements of elliptic flow for open charm mesons (D⁰) and strange hadrons. From these measurements, constraints can be obtained on the collective dynamics of charm quarks produced in high-multiplicity events arising from small systems.

Original language	English (US)
Pages (from-to)	172-194
Number of pages	23
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	791
DOIs	https://doi.org/10.1016/j.physletb.2019.02.018
State	Published - Apr 10 2019

Bibliographical note

Publisher Copyright:
© 2019 The Author(s)

Keywords

CMS
Correlation
Flow
Heavy flavor
Heavy-ion physics
pPb

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10.1016/j.physletb.2019.02.018

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Observation of prompt J/ψ meson elliptic flow in high-multiplicity pPb collisions at √s_NN=8.16 TeV. / The CMS Collaboration; E-mail address: cms-publication-committee-chair@cern.ch.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 791, 10.04.2019, p. 172-194.

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

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title = "Observation of prompt J/ψ meson elliptic flow in high-multiplicity pPb collisions at √sNN=8.16 TeV",

abstract = "A measurement of the elliptic flow (v2) of prompt J/ψ mesons in high-multiplicity pPb collisions is reported using data collected by the CMS experiment at a nucleon-nucleon center-of-mass energy sNN=8.16TeV. Prompt J/ψ mesons decaying into two muons are reconstructed in the rapidity region in the nucleon-nucleon center-of-mass frame (ycm), corresponding to either −2.86cm<−1.86 or 0.94cm<1.94. The average v2 result from the two rapidity ranges is reported over the transverse momentum (pT) range from 0.2 to 10 GeV. Positive v2 values are observed for the prompt J/ψ meson, as extracted from long-range two-particle correlations with charged hadrons, for 2T<8 GeV. The prompt J/ψ results are compared with previous CMS measurements of elliptic flow for open charm mesons (D0) and strange hadrons. From these measurements, constraints can be obtained on the collective dynamics of charm quarks produced in high-multiplicity events arising from small systems.",

keywords = "CMS, Correlation, Flow, Heavy flavor, Heavy-ion physics, pPb",

author = "{The CMS Collaboration} and {E-mail address: cms-publication-committee-chair@cern.ch} and Sirunyan, {A. M.} and A. Tumasyan and W. Adam and F. Ambrogi and E. Asilar and T. Bergauer and J. Brandstetter and M. Dragicevic and J. Er{\"o} and {Escalante Del Valle}, A. and M. Flechl and R. Fr{\"u}hwirth and Ghete, {V. M.} and J. Hrubec and M. Jeitler and N. Krammer and I. Kr{\"a}tschmer and D. Liko and T. Madlener and I. Mikulec and N. Rad and H. Rohringer and J. Schieck and R. Sch{\"o}fbeck and M. Spanring and D. Spitzbart and A. Taurok and W. Waltenberger and J. Wittmann and Wulz, {C. E.} and M. Zarucki and V. Chekhovsky and V. Mossolov and {Suarez Gonzalez}, J. and {De Wolf}, {E. A.} and {Di Croce}, D. and X. Janssen and J. Lauwers and M. Pieters and {Van Haevermaet}, H. and {Van Mechelen}, P. and {Van Remortel}, N. and {Abu Zeid}, S. and F. Blekman and J. D'Hondt and M. Krohn and Chatterjee, {R. M.} and Y. Kubota and J. Mans and R. Rusack",

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AU - The CMS Collaboration

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AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Ambrogi, F.

AU - Asilar, E.

AU - Bergauer, T.

AU - Brandstetter, J.

AU - Dragicevic, M.

AU - Erö, J.

AU - Escalante Del Valle, A.

AU - Flechl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Hrubec, J.

AU - Jeitler, M.

AU - Krammer, N.

AU - Krätschmer, I.

AU - Liko, D.

AU - Madlener, T.

AU - Mikulec, I.

AU - Rad, N.

AU - Rohringer, H.

AU - Schieck, J.

AU - Schöfbeck, R.

AU - Spanring, M.

AU - Spitzbart, D.

AU - Taurok, A.

AU - Waltenberger, W.

AU - Wittmann, J.

AU - Wulz, C. E.

AU - Zarucki, M.

AU - Chekhovsky, V.

AU - Mossolov, V.

AU - Suarez Gonzalez, J.

AU - De Wolf, E. A.

AU - Di Croce, D.

AU - Janssen, X.

AU - Lauwers, J.

AU - Pieters, M.

AU - Van Haevermaet, H.

AU - Van Mechelen, P.

AU - Van Remortel, N.

AU - Abu Zeid, S.

AU - Blekman, F.

AU - D'Hondt, J.

AU - Krohn, M.

AU - Chatterjee, R. M.

AU - Kubota, Y.

AU - Mans, J.

AU - Rusack, R.

PY - 2019/4/10

Y1 - 2019/4/10

N2 - A measurement of the elliptic flow (v2) of prompt J/ψ mesons in high-multiplicity pPb collisions is reported using data collected by the CMS experiment at a nucleon-nucleon center-of-mass energy sNN=8.16TeV. Prompt J/ψ mesons decaying into two muons are reconstructed in the rapidity region in the nucleon-nucleon center-of-mass frame (ycm), corresponding to either −2.86cm<−1.86 or 0.94cm<1.94. The average v2 result from the two rapidity ranges is reported over the transverse momentum (pT) range from 0.2 to 10 GeV. Positive v2 values are observed for the prompt J/ψ meson, as extracted from long-range two-particle correlations with charged hadrons, for 2T<8 GeV. The prompt J/ψ results are compared with previous CMS measurements of elliptic flow for open charm mesons (D0) and strange hadrons. From these measurements, constraints can be obtained on the collective dynamics of charm quarks produced in high-multiplicity events arising from small systems.

AB - A measurement of the elliptic flow (v2) of prompt J/ψ mesons in high-multiplicity pPb collisions is reported using data collected by the CMS experiment at a nucleon-nucleon center-of-mass energy sNN=8.16TeV. Prompt J/ψ mesons decaying into two muons are reconstructed in the rapidity region in the nucleon-nucleon center-of-mass frame (ycm), corresponding to either −2.86cm<−1.86 or 0.94cm<1.94. The average v2 result from the two rapidity ranges is reported over the transverse momentum (pT) range from 0.2 to 10 GeV. Positive v2 values are observed for the prompt J/ψ meson, as extracted from long-range two-particle correlations with charged hadrons, for 2T<8 GeV. The prompt J/ψ results are compared with previous CMS measurements of elliptic flow for open charm mesons (D0) and strange hadrons. From these measurements, constraints can be obtained on the collective dynamics of charm quarks produced in high-multiplicity events arising from small systems.

KW - CMS

KW - Correlation

KW - Flow

KW - Heavy flavor

KW - Heavy-ion physics

KW - pPb

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U2 - 10.1016/j.physletb.2019.02.018

DO - 10.1016/j.physletb.2019.02.018

M3 - Article

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SN - 0370-2693

VL - 791

SP - 172

EP - 194

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

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

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