Light-heavy-ion collisions: a window into pre-equilibrium QCD dynamics?

Romatschke, P.

doi:10.1140/epjc/s10052-015-3509-3

Title: Light-heavy-ion collisions: a window into pre-equilibrium QCD dynamics?

Journal Article · Fri Jul 03 00:00:00 EDT 2015 · European Physical Journal. C, Particles and Fields

DOI:https://doi.org/10.1140/epjc/s10052-015-3509-3· OSTI ID:1454425

Romatschke, P. ^[1]

Univ. of Colorado, Boulder, CO (United States)

Relativistic collisions of light on heavy ions (p + Au at $$\sqrt{s}$$ = 7.7 GeV, p + Au, d + Au, ³He + Au at $$\sqrt{s}$$ = 62.4 GeV and 200 GeV and p + Pb, ³He + Pb at $$\sqrt{s}$$ = 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 GeV is predicted to be similar in magnitude to that found in ³He + Au collisions. Moreover, the v₃(p_T) ratio of ³He + 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.

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Research Organization:: Univ. of Colorado, Boulder, CO (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National Science Foundation (NSF); National Center for Atmospheric Research, Boulder, CO (United States)

Grant/Contract Number:: SC0008027; SC0008132; CNS-0821794

OSTI ID:: 1454425

Journal Information:: European Physical Journal. C, Particles and Fields, Vol. 75, Issue 7; ISSN 1434-6044

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 75 works

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Title: Light-heavy-ion collisions: a window into pre-equilibrium QCD dynamics?

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