Probing the profile of bulk matter in p+Pb collisions via directed flow of heavy quarks
arXiv:2107.07457 · doi:10.1103/PhysRevC.104.024901
Abstract
The asymmetric initial geometry in p+Pb collisions provide an opportunity to probe the initial matter distribution in these collisions. Using A Multi-Phase Transport (AMPT) model, we have studied the production of light and heavy quark particles in p+Pb collisions at = 5.02 TeV. The pseudo-rapidity density (dN/d) and elliptic flow () of light-quark particles from AMPT reasonably agrees with the measurements by ALICE. We predicted the directed flow of light and heavy quarks in p+Pb collisions. The of both light and heavy-quark mesons show a non-trivial dependence in p- and Pb-going directions. When integrated over the transverse momentum range 0 5 GeV/c, the magnitude of heavy quark directed flow () is found to be 15 times larger than the light quark species in the Pb-going direction while the same in the p-going direction are comparable. The light and heavy quarks may offer the possibility to probe the initial matter density as well as the collective dynamics in p+Pb collisions
arXiv comment7 pages, 9 figures
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