Physics PAN Seminar by Dr. Giuliano Giacalone (ITP Heidelberg)

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Date: March 26, 2021
Time: 3:30 p.m. - 4:30 p.m.
Location: ZOOM
Category: Seminar

Physics PAN Seminar by Dr. Giuliano Giacalone (ITP Heidelberg)


Title: Correlating isotropic flow with anisotropic flow in heavy-ion collisions: nuclear phenomenology at high energy beyond the quark-gluon plasma

Abstract: Experiments conducted at the Relativistic Heavy Ion Collider and at the Large Hadron Collider have established that the interaction of two nuclei at relativistic energy creates a small droplet of quark-gluon plasma (QGP), whose dynamics, from its formation till its fragmentation into hadrons, can be effectively described with the laws of relativistic (viscous)hydrodynamics. I argue that the great success of this hydrodynamic description permits us to search for exciting nuclearphenomena beyond the original purposes of the heavy-ion program. Experimentally, this can be achieved by looking at somewhat unconventional multi-particle correlation observables, where the measures of the anisotropy of the emission of hadrons, the so-called flow coefficients, v_n, are correlated with the magnitude of the isotropic emission, i.e., the average transverse momentum, , of the hadron spectrum. I show that these v_n- correlations provide in particular: i) a novel means to observe deformations in the geometric shape (structure) of the colliding ions; ii) a handle to manipulate the strong electromagnetic fields produced in the interaction of nuclei at high energy; iii) a way to trigger manifestations of the correlation of gluon fields in the pre-QGP stages of the collision process. I point out a few additional phenomena that can be analyzed with the same techniques, and emphasize that the upcoming experimental advances (LHC 3&4, sPHENIX, STAR forward upgrade) will enable us to pursue such studies with success over the next decade.

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Debojit Sarkar


March 2021