Limiting fragmentation in high-energy nuclear collisions at the CERN Large Hadron Collider

Abstract

The hypothesis of limiting fragmentation (LF) or it is called otherwise recently, as extended longitudinal scaling, is an interesting phenomena in high energy multiparticle production process. This paper discusses about different regions of phase space and their importance in hadron production, giving special emphasis on the fragmentation region. Although it was conjectured as a universal phenomenon in high energy physics, with the advent of higher center-of-mass energies, it has become prudent to analyse and understand the validity of such hypothesis in view of the increasing inelastic nucleon-nucleon cross-section (${\sigma }_{\mathrm{in}}$). In this work, we revisit the phenomenon of limiting fragmentation for nucleus-nucleus (A+A) collisions in the pseudorapidity distribution of charged particles at various energies. We use energy dependent ${\sigma }_{\mathrm{in}}$ to transform the charged particle pseudorapidity distributions ($d{N}_{ch}^{\mathrm{AA}}/d\eta$) into differential cross-section per unit pseudorapidity ($d{\sigma }^{\mathrm{AA}}/d\eta$) of charged particles and study the phenomenon of LF. We find that in $d{\sigma }^{\mathrm{AA}}/d\eta$ LF seems to be violated at LHC energies while considering the energy dependent ${\sigma }_{\mathrm{in}}$. We also perform a similar study using A Multi-Phase Transport (AMPT) Model with string melting scenario and also find that LF is violated at LHC energies.

Published version

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Cited by in corpus (5)

• Multiplicity and pseudorapidity density distributions of charged particles produced in pp, pA and AA collisions at RHIC \& LHC energies
• Limiting fragmentation at LHC energies
• Limiting fragmentation in heavy-ion stopping?
• Limiting fragmentation as an initial state probe in heavy ion collisions
• Investigating radial flow-like effects via pseudorapidity and transverse spherocity dependence of particle production in pp collisions at the LHC