English

Beam energy and system dependence of rapidity-even dipolar flow

Nuclear Experiment 2018-03-14 v1 High Energy Physics - Experiment

Abstract

New measurements of rapidity-even dipolar flow, v1even^{even}_{1}, are presented for several transverse momenta, pTp_T, and centrality intervals in Au+Au collisions at sNN = 200, 39\sqrt{s_{NN}}~=~200,~39 and 19.619.6 GeV, U+U collisions at sNN = 193\sqrt{s_{NN}}~=~193 GeV, and Cu+Au, Cu+Cu, d+Au and p+Au collisions at sNN = 200\sqrt{s_{NN}}~=~200~GeV. The v1even^{even}_{1} shows characteristic dependencies on pTp_{T}, centrality, collision system and sNN\sqrt{s_{_{NN}}}, consistent with the expectation from a hydrodynamic-like expansion to the dipolar fluctuation in the initial state. These measurements could serve as constraints to distinguish between different initial-state models, and aid a more reliable extraction of the specific viscosity η/s\eta/s.

Keywords

Cite

@article{arxiv.1802.03869,
  title  = {Beam energy and system dependence of rapidity-even dipolar flow},
  author = {Niseem Magdy},
  journal= {arXiv preprint arXiv:1802.03869},
  year   = {2018}
}