J/ψ elliptic and triangular flow in Pb-Pb collisions at √sNN = 5.02 TeV

The ALICE collaboration

doi:10.1007/JHEP10(2020)141

J/ψ elliptic and triangular flow in Pb-Pb collisions at √sNN = 5.02 TeV

The ALICE collaboration

Sección de Física

CERN
Variable Energy Cyclotron Centre
Czech Academy of Sciences
Goethe University Frankfurt
University of Lund
Panjab University
Sezione INFN
Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi
National Institute for Nuclear Physics
Aligarh Muslim University
Korea Institute of Science and Technology Information
Indonesian Institute of Sciences
Russian Research Centre Kurchatov Institute
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Fudan University
Universidade Estadual de Campinas
Central China Normal University
Universidad Nacional Autónoma de México
COMSATS University Islamabad
University of Houston
Bogolyubov Institute for Theoretical Physics Nasu
University of Bergen
St. Petersburg State University
National Institute for Physics and Nuclear Engineering
University of Münster
Ruprecht-Karls-Universität Heidelberg
Creighton University
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Lawrence Berkeley National Laboratory
Nantes Université
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Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN
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Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile
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Ohio State University
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Research output: Contribution to journal › Article › peer-review

48 Scopus citations

Abstract

The inclusive J/ψ elliptic (v₂) and triangular (v₃) flow coefficients measured at forward rapidity (2.5 < y < 4) and the v₂ measured at midrapidity (|y| < 0.9) in Pb-Pb collisions at sNN = 5.02 TeV using the ALICE detector at the LHC are reported. The entire Pb-Pb data sample collected during Run 2 is employed, amounting to an integrated luminosity of 750 μb⁻¹ at forward rapidity and 93 μb⁻¹ at midrapidity. The results are obtained using the scalar product method and are reported as a function of transverse momentum p_T and collision centrality. At midrapidity, the J/ψ v₂ is in agreement with the forward rapidity measurement. The centrality averaged results indicate a positive J/ψ v₃ with a significance of more than 5σ at forward rapidity in the p_T range 2 < p_T< 5 GeV/c. The forward rapidity v₂, v₃, and v₃/v₂ results at low and intermediate p_T (p_T ≲ 8 GeV/c) exhibit a mass hierarchy when compared to pions and D mesons, while converging into a species-independent curve at higher p_T. At low and intermediate p_T, the results could be interpreted in terms of a later thermalization of charm quarks compared to light quarks, while at high p_T, path-length dependent effects seem to dominate. The J/ψ v₂ measurements are further compared to a microscopic transport model calculation. Using a simplified extension of the quark scaling approach involving both light and charm quark flow components, it is shown that the D-meson v_n measurements can be described based on those for charged pions and J/ψ flow. [Figure not available: see fulltext.]

Original language	English
Article number	141
Journal	Journal of High Energy Physics
Volume	2020
Issue number	10
DOIs	https://doi.org/10.1007/JHEP10(2020)141
State	Published - 1 Oct 2020

Keywords

Hadron-Hadron scattering (experiments)

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10.1007/JHEP10(2020)141

Cite this

@article{28099f49b13a4f5290b310360d736588,

title = "J/ψ elliptic and triangular flow in Pb-Pb collisions at √sNN = 5.02 TeV",

abstract = "The inclusive J/ψ elliptic (v2) and triangular (v3) flow coefficients measured at forward rapidity (2.5 < y < 4) and the v2 measured at midrapidity (|y| < 0.9) in Pb-Pb collisions at sNN = 5.02 TeV using the ALICE detector at the LHC are reported. The entire Pb-Pb data sample collected during Run 2 is employed, amounting to an integrated luminosity of 750 μb−1 at forward rapidity and 93 μb−1 at midrapidity. The results are obtained using the scalar product method and are reported as a function of transverse momentum pT and collision centrality. At midrapidity, the J/ψ v2 is in agreement with the forward rapidity measurement. The centrality averaged results indicate a positive J/ψ v3 with a significance of more than 5σ at forward rapidity in the pT range 2 < pT< 5 GeV/c. The forward rapidity v2, v3, and v3/v2 results at low and intermediate pT (pT ≲ 8 GeV/c) exhibit a mass hierarchy when compared to pions and D mesons, while converging into a species-independent curve at higher pT. At low and intermediate pT, the results could be interpreted in terms of a later thermalization of charm quarks compared to light quarks, while at high pT, path-length dependent effects seem to dominate. The J/ψ v2 measurements are further compared to a microscopic transport model calculation. Using a simplified extension of the quark scaling approach involving both light and charm quark flow components, it is shown that the D-meson vn measurements can be described based on those for charged pions and J/ψ flow. [Figure not available: see fulltext.]",

keywords = "Hadron-Hadron scattering (experiments)",

author = "\{The ALICE collaboration\} and S. Acharya and D. Adamov{\'a} and A. Adler and J. Adolfsson and Aggarwal, \{M. M.\} and \{Aglieri Rinella\}, G. and M. Agnello and N. Agrawal and Z. Ahammed and S. Ahmad and Ahn, \{S. U.\} and Z. Akbar and A. Akindinov and M. Al-Turany and Alam, \{S. N.\} and Albuquerque, \{D. S.D.\} and D. Aleksandrov and B. Alessandro and Alfanda, \{H. M.\} and \{Alfaro Molina\}, R. and B. Ali and Y. Ali and A. Alici and N. Alizadehvandchali and A. Alkin and J. Alme and T. Alt and L. Altenkamper and I. Altsybeev and Anaam, \{M. N.\} and C. Andrei and D. Andreou and A. Andronic and M. Angeletti and V. Anguelov and C. Anson and T. Anti{\v c}i{\'c} and F. Antinori and P. Antonioli and N. Apadula and L. Aphecetche and H. Appelsh{\"a}user and S. Arcelli and R. Arnaldi and M. Arratia and Arsene, \{I. C.\} and M. Arslandok and A. Augustinus and \{Bazo Alba\}, \{J. L.\} and Gago, \{A. M.\}",

note = "Publisher Copyright: {\textcopyright} 2020, The Author(s).",

year = "2020",

month = oct,

day = "1",

doi = "10.1007/JHEP10(2020)141",

language = "English",

volume = "2020",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

number = "10",

}

TY - JOUR

T1 - J/ψ elliptic and triangular flow in Pb-Pb collisions at √sNN = 5.02 TeV

AU - The ALICE collaboration

AU - Acharya, S.

AU - Adamová, D.

AU - Adler, A.

AU - Adolfsson, J.

AU - Aggarwal, M. M.

AU - Aglieri Rinella, G.

AU - Agnello, M.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahmad, S.

AU - Ahn, S. U.

AU - Akbar, Z.

AU - Akindinov, A.

AU - Al-Turany, M.

AU - Alam, S. N.

AU - Albuquerque, D. S.D.

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alfanda, H. M.

AU - Alfaro Molina, R.

AU - Ali, B.

AU - Ali, Y.

AU - Alici, A.

AU - Alizadehvandchali, N.

AU - Alkin, A.

AU - Alme, J.

AU - Alt, T.

AU - Altenkamper, L.

AU - Altsybeev, I.

AU - Anaam, M. N.

AU - Andrei, C.

AU - Andreou, D.

AU - Andronic, A.

AU - Angeletti, M.

AU - Anguelov, V.

AU - Anson, C.

AU - Antičić, T.

AU - Antinori, F.

AU - Antonioli, P.

AU - Apadula, N.

AU - Aphecetche, L.

AU - Appelshäuser, H.

AU - Arcelli, S.

AU - Arnaldi, R.

AU - Arratia, M.

AU - Arsene, I. C.

AU - Arslandok, M.

AU - Augustinus, A.

AU - Bazo Alba, J. L.

AU - Gago, A. M.

PY - 2020/10/1

Y1 - 2020/10/1

N2 - The inclusive J/ψ elliptic (v2) and triangular (v3) flow coefficients measured at forward rapidity (2.5 < y < 4) and the v2 measured at midrapidity (|y| < 0.9) in Pb-Pb collisions at sNN = 5.02 TeV using the ALICE detector at the LHC are reported. The entire Pb-Pb data sample collected during Run 2 is employed, amounting to an integrated luminosity of 750 μb−1 at forward rapidity and 93 μb−1 at midrapidity. The results are obtained using the scalar product method and are reported as a function of transverse momentum pT and collision centrality. At midrapidity, the J/ψ v2 is in agreement with the forward rapidity measurement. The centrality averaged results indicate a positive J/ψ v3 with a significance of more than 5σ at forward rapidity in the pT range 2 < pT< 5 GeV/c. The forward rapidity v2, v3, and v3/v2 results at low and intermediate pT (pT ≲ 8 GeV/c) exhibit a mass hierarchy when compared to pions and D mesons, while converging into a species-independent curve at higher pT. At low and intermediate pT, the results could be interpreted in terms of a later thermalization of charm quarks compared to light quarks, while at high pT, path-length dependent effects seem to dominate. The J/ψ v2 measurements are further compared to a microscopic transport model calculation. Using a simplified extension of the quark scaling approach involving both light and charm quark flow components, it is shown that the D-meson vn measurements can be described based on those for charged pions and J/ψ flow. [Figure not available: see fulltext.]

AB - The inclusive J/ψ elliptic (v2) and triangular (v3) flow coefficients measured at forward rapidity (2.5 < y < 4) and the v2 measured at midrapidity (|y| < 0.9) in Pb-Pb collisions at sNN = 5.02 TeV using the ALICE detector at the LHC are reported. The entire Pb-Pb data sample collected during Run 2 is employed, amounting to an integrated luminosity of 750 μb−1 at forward rapidity and 93 μb−1 at midrapidity. The results are obtained using the scalar product method and are reported as a function of transverse momentum pT and collision centrality. At midrapidity, the J/ψ v2 is in agreement with the forward rapidity measurement. The centrality averaged results indicate a positive J/ψ v3 with a significance of more than 5σ at forward rapidity in the pT range 2 < pT< 5 GeV/c. The forward rapidity v2, v3, and v3/v2 results at low and intermediate pT (pT ≲ 8 GeV/c) exhibit a mass hierarchy when compared to pions and D mesons, while converging into a species-independent curve at higher pT. At low and intermediate pT, the results could be interpreted in terms of a later thermalization of charm quarks compared to light quarks, while at high pT, path-length dependent effects seem to dominate. The J/ψ v2 measurements are further compared to a microscopic transport model calculation. Using a simplified extension of the quark scaling approach involving both light and charm quark flow components, it is shown that the D-meson vn measurements can be described based on those for charged pions and J/ψ flow. [Figure not available: see fulltext.]

KW - Hadron-Hadron scattering (experiments)

UR - https://www.scopus.com/pages/publications/85094134945

U2 - 10.1007/JHEP10(2020)141

DO - 10.1007/JHEP10(2020)141

M3 - Article

AN - SCOPUS:85094134945

SN - 1126-6708

VL - 2020

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 10

M1 - 141

ER -

J/ψ elliptic and triangular flow in Pb-Pb collisions at √sNN = 5.02 TeV

Abstract

Keywords

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