May 16 – 20, 2022
Europe/Zurich timezone

Transverse spherocity dependence of global observables in heavy-ion collisions at the LHC using AMPT model

May 17, 2022, 7:00 PM
Theory poster Heavy Ions Poster Session I


Mr Suraj Prasad (Indian Institute of Technology Indore (IN))


Transverse spherocity is a tool that separates events based on geometrical shapes, i.e., jetty and isotropic events. Transverse spherocity based studies are widely understood in small systems like proton-proton (pp) collisions in simulations and experiments, but it is yet to be explored in heavy-ion collisions. In this work, we attempt to study different global observables in heavy-ion collisions such as squared speed of sound, Bjorken energy density and kinetic freeze-out properties for different centrality classes as a function of transverse spherocity. This study has been carried out using a multi-phase transport model (AMPT) in Pb-Pb collisions at $\rm\sqrt{s_{NN}}$ = 5.02 TeV. Contrary to pp collisions where jetty events are dominated, heavy-ion collisions are found to be dominated by isotropic events. Squared speed of sound and Bjorken energy density are found to be insensitive to transverse spherocity. In contrast, kinetic freeze-out properties such as transverse radial flow velocity and kinetic-freezeout temperature are found to be susceptive to transverse spherocity.

Reference: S. Prasad, N. Mallick, D. Behera, R. Sahoo and S. Tripathy, Sci. Rep. 12, 3917 (2022).

Primary authors

Mr Suraj Prasad (Indian Institute of Technology Indore (IN)) Neelkamal Mallick (Indian Institute of Technology Indore) Debadatta Behera (Indian Institute of Technology Indore (IN)) Raghunath Sahoo (Indian Institute of Technology Indore (IN)) Sushanta Tripathy (INFN, Bologna (IT))

Presentation materials