Signatures of collective behavior in small systems

Abstract

We perform 3+1D viscous hydrodynamics calculations of proton-nucleus (pA) and nucleus-nucleus (AA) collisions. Our goal is to understand the apparent collective behavior recently observed in pA collisions and to verify whether the highest multiplicity collision systems can be accurately described as a relativistic fluid. We compare our calculations of flow variables to existing measurements, and demonstrate that hydrodynamics correctly captures the measured trends. We show that our predictions for the pair correlation observable $r_n$ are validated by recent experimental pA measurements, and that our results are sensitive to the granularity of the initial state. We also compare our results with measurements done for nucleus-nucleus collisions.

Talk presented by IK at Quark Matter 2014

References in corpus (7)

• Glauber Modeling in High Energy Nuclear Collisions
• Elliptic and triangular flow in event-by-event (3+1)D viscous hydrodynamics
• Observation of long-range near-side angular correlations in proton-lead collisions at the LHC
• Directed flow in ultrarelativistic heavy-ion collisions
• Breaking of factorization of two-particle correlations in hydrodynamics
• Transverse momentum structure of pair correlations as a signature of collective behavior in small collision systems
• Searches for $p_{\mathrm{T}}$ dependent fluctuations of flow angle and magnitude in Pb--Pb and p--Pb collisions

Cited by in corpus (3)

• Theoretical and Experimental Constraints for the Equation of State of Dense and Hot Matter
• What does the matter created in high multiplicity proton-nucleus collisions teach us about the 3-D structure of the proton?
• Measurements of mixed harmonic cumulants in Pb-Pb collisions at $\sqrt{{\text{s}}_{\mathrm{NN}}}=5.02$ TeV