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Study of J/ψ azimuthal anisotropy at forward rapidity in Pb-Pb collisions at √sNN=5.02 TeV

Acharya, S.
•
Acosta, F. T.
•
Adamová, D.
altro
Zmeskal, J.
2019
  • journal article

Periodico
JOURNAL OF HIGH ENERGY PHYSICS
Abstract
The second (v2) and third (v3) flow harmonic coefficients of J/ψ mesons are measured at forward rapidity (2.5 < y < 4.0) in Pb-Pb collisions at √sNN = 5.02 TeV with the ALICE detector at the LHC. Results are obtained with the scalar product method and reported as a function of transverse momentum, pT, for various collision centralities. A positive value of J/ψ v3 is observed with 3.7σ significance. The measurements, compared to those of prompt D0 mesons and charged particles at mid-rapidity, indicate an ordering with vn(J/ψ) < vn(D0) < vn(h±) (n = 2, 3) at low and intermediate pT up to 6GeV/c and a convergence with v2(J/ψ) ≈ v2(D0) ≈ v2(h±) at high pT above 6–8 GeV/c. In semi- central collisions (5–40% and 10–50% centrality intervals) at intermediate pT between 2 and 6 GeV/c, the ratio v3/v2 of J/ψ mesons is found to be significantly lower (4.6σ) with respect to that of charged particles. In addition, the comparison to the prompt D0-meson ratio in the same pT interval suggests an ordering similar to that of the v2 and v3 coefficients. The J/ψ v2 coefficient is further studied using the Event Shape Engineering technique. The obtained results are found to be compatible with the expected variations of the eccentricity of the initial-state geometry.
DOI
10.1007/JHEP02(2019)012
WOS
WOS:000458134300001
Archivio
http://hdl.handle.net/11368/2936506
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85061202505
https://link.springer.com/article/10.1007%2FJHEP02%282019%29012
Diritti
open access
license:creative commons
license uri:http://creativecommons.org/licenses/by/4.0/
FVG url
https://arts.units.it/bitstream/11368/2936506/1/JHEP_02(2019)012_1-29.pdf
Soggetti
  • Hadron-Hadron scatter...

  • Nuclear and High Ener...

Scopus© citazioni
15
Data di acquisizione
Jun 14, 2022
Vedi dettagli
Web of Science© citazioni
19
Data di acquisizione
Mar 21, 2024
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