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

arXiv.org e-print Archiv (Hrsg). Genf, Schweiz. 2018 S. 1 - 26

Erscheinungsjahr: 2018

Publikationstyp: Diverses (Forschungsbericht)

Sprache: Englisch

GeprüftBibliothek

Inhaltszusammenfassung


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-rapidi...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 6 GeV/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. » weiterlesen» einklappen

  • flow harmonic coefficient
  • J/ψ meson
  • ALICE detector
  • forward rapidity
  • Pb-Pb collision

Autoren


Acharya, Shreyasi (Autor)
Acosta, Fernando Torales (Autor)
Adamova, Dagmar (Autor)

Klassifikation


DDC Sachgruppe:
Physik

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