Year: 2015
Type: article
Abstract: Relativistic collisions of light on heavy ions (p + Au at $$\sqrt{s}=7.7$$ s = 7.7 GeV, p + Au , d + Au , $$^3$$ 3 He + Au at $$\sqrt{s}=62.4$$ s = 62.4 GeV and 200 GeV and p + Pb , $$^3$$ 3 He + Pb at $$\sqrt{s}=5.02$$ s = 5.02 TeV) are simulated using “superSONIC”, a model that includes pre-equilibrium flow, viscous hydrodynamics and a hadronic cascade afterburner. Even though these systems have strong gradients and only consist of at most a few tens of charged particles per unit rapidity, one finds evidence that a hydrodynamic description applies to these systems. Based on these simulations, the presence of a triangular flow component in d + Au collisions at $$\sqrt{s}=200$$ s = 200 GeV is predicted to be similar in magnitude to that found in $$^3$$ 3 He + Au collisions. Furthermore, the $$v_3(p_T)$$ v 3 ( p T ) ratio of $$^3$$ 3 He + Au to d + Au is found to be sensitive to the presence of pre-equilibrium flow. This would imply an experimentally accessible window into pre-equilibrium QCD dynamics using light-heavy-ion collisions.
Source: The European Physical Journal C
Author: P. Romatschke
Institution: University of Colorado Boulder
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2161026403