Azimuthal anisotropy relative to the participant plane from a multiphase transport model in central p plus Au, d + Au, and He-3 + Au collisions at root(NN)-N-S=200 GeV

作者：Koop J D Orjuela^*; Adare A; McGlinchey D; Nagle J L

来源：Physical Review C, 2015, 92(5): 054903.

DOI：10.1103/PhysRevC.92.054903

Recent data from p + p and p + Pb collisions at the Large Hadron Collider (LHC), and d + Au and He-3 + Au collisions at the Relativistic Heavy Ion Collider (RHIC) reveal patterns that-when observed in the collision of heavy nuclei-are commonly interpreted as indicators of a locally equilibrated system in collective motion. The comparison of these data sets, including the forthcoming results from p + Au and p + Al collisions at RHIC, will help to elucidate the geometric dependence of such patterns. It has recently been shown that a multiphase transport model (AMPT) can describe some of these features in LHC data with a parton-parton scattering cross section comparable to that required to describe A + A data. In this paper, we extend these studies by incorporating a full wave-function description of the He-3 nucleus to calculate elliptical and triangular anisotropy moments v(2) and v(3) for p + Au, d + Au, and He-3 + Au collisions at the RHIC top energy of 200 GeV. We find reasonable agreement with the measured v(2) in d + Au and He-3 + Au and v(3) in He-3 + Au for transverse momentum (p(T)) less than or similar to 1 GeV/c, but underestimate these measurements for higher values of p(T). We predict a pattern of coefficients (v(2), v(3)) for p + Au, dominated by differences in the number of induced local hot spots (i.e., one, two, or three) arising from intrinsic geometry. Additionally, we examine how this substantial azimuthal anisotropy accrues during each individual evolutionary phase of the collision in the AMPT model. The possibility of a simultaneous description of RHIC-and LHC-energy data, the suite of different geometries, and high multiplicity p + p data is an exciting possibility for understanding the underlying physics in these systems.

• 出版日期2015-11-5