2014/03/07 by R. P. G. Andrade, Rone P. G. Andrade, Andrade, Rone P. G. +4
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Magnetic confinement fusion research #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Superconducting Materials and Applications #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.48550/arxiv.1403.1789
21 pages, 12 figures
arxiv created 2014/03/07 · openalex publication_date 2014/03/07 · arxiv updated 2014/03/10 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In this paper we investigate how the energy and momentum deposited by partonic dijets in the quark-gluon plasma may affect the direct, elliptic and triangular flow of low (and intermediate) pT hadrons in central Au+Au collisions at RHIC. The dijets are modeled as external sources in the energy-momentum conservation equations for hydrodynamics, which are solved on an event-by-event basis within the ideal fluid approximation. We focus our investigation at mid-rapidity and solve the hydrodynamic equations imposing boost invariance. Differential anisotropic flow coefficients for pT \gtrsim 1 GeV are found to be significantly enhanced if the dijets deposit on average more than 12 GeV in the QGP (or more than 6 GeV per jet). Because this jet-induced extra anisotropic flow is not related to the fluctuations of the initial geometry of the collision, the correlation between the v2 and v3 coefficients and their corresponding eccentricities is considerably weakened. In addition, we argue that the extra amount of direct flow induced by dijets may be quantified by comparing the azimuthal dependence of dihadron correlations in dijet events with the corresponding quantity obtained in events without dijets. This comparison could be used to give a rough estimate of the magnitude of the effective coupling between the jets and the medium.