Multiplicities from black-hole formation in heavy-ion collisions

TL;DR

This paper investigates black-hole formation in heavy-ion collisions using holographic shock wave models across various backgrounds, providing estimates for particle multiplicities at RHIC and LHC.

Contribution

It introduces a comprehensive holographic framework for modeling heavy-ion collisions with diverse backgrounds and shock profiles, predicting multiplicities relevant for experiments.

Findings

Predicted multiplicities for RHIC and LHC

Analyzed effects of different shock profiles

Explored UV cutoff methods in holographic models

Abstract

The formation of trapped surfaces in the head-on collision of shock waves in conformal and non-conformal backgrounds is investigated. The backgrounds in- clude all interesting confining and non-confining backgrounds that may be relevant for QCD. Several transverse profiles of the shocks are investigated including distributions that fall-off as powers or exponentials. Different ways of cutting-off the UV contributions (that are expected to be perturbative in QCD) are explored. Under some plausible simplifying assumptions our estimates are converted into predictions for multiplicities for heavy-ion collisions at RHIC and LHC.