J/psi elliptic and triangular flow in Pb-Pb collisions at root s(NN)=5.02 TeV


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Acharya S., Adamova D., Adler A., Adolfsson J., Aggarwal M. M., Rinella G. A., ...Daha Fazla

JOURNAL OF HIGH ENERGY PHYSICS, cilt.2020, sa.10, 2020 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 2020 Sayı: 10
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1007/jhep10(2020)141
  • Dergi Adı: JOURNAL OF HIGH ENERGY PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, INSPEC, zbMATH, Directory of Open Access Journals
  • Anahtar Kelimeler: Hadron-Hadron scattering (experiments), TRANSVERSE-MOMENTUM DEPENDENCE, SUPPRESSION, RAPIDITY, CHARMONIA
  • Bursa Uludağ Üniversitesi Adresli: Hayır

Özet

The inclusive J/psi (v(2)) and triangular (v(3)) flow coefficients measured at forward rapidity (2.5 < y < 4) and the v2 measured at midrapidity (vertical bar y vertical bar < 0.9) in Pb-Pb collisions at root s(NN) = 5.02TeV 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 mu b(-1) at forward rapidity and 93 mu b(-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 psi v(2) is in agreement with the forward rapidity measurement. The centrality averaged results indicate a positive J/psi v(3) with a significance of more than 5 sigma at forward rapidity in the p(T) range 2 < p(T) < 5 GeV/c. The forward rapidity v(2), v(3), and v(3)/v(2) 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/psi v(2) 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/flow.