Scaling properties of the mean multiplicity and pseudorapidity density in e +e + , e ± +p, p(p) ¯ +p, p+a and a+A(b) collisions

Roy A. Lacey, Peifeng Liu, Niseem Magdy, M. Csanád, Benjamin Schweid, Nuggehalli N. Ajitanand, John Alexander, Robert Pak

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The charged-particle pseudorapidity density (dN ch /dη) for p(p¯)+p, p+A and A+A(B) collisions and the mean multiplicity hN ch i for e +e + , e ± +p, and p(p¯)+p collisions are studied for a wide range of beam energies (s). Characteristic scaling patterns are observed for both dN ch /dη and hN ch i, consistent with a thermal particle production mechanism for the bulk of the soft particles created in all of these systems. The scaling patterns found also validate an essential role for quark participants in these collisions. The measured values for dN ch /dη and hN ch i are observed to factorize into contributions that depend on log(s) and the number of nucleon or quark participant pairs N pp . The quantification of these contributions gives expressions that serve to systematize dN ch /dη and hN ch i measurements spanning nearly 4 orders of magnitude in s and to predict their values as a function of s and N pp .

Original languageEnglish
Article number22
JournalUniverse
Volume4
Issue number1
DOIs
Publication statusPublished - Jan 1 2018

Keywords

  • Effective energy
  • Leading particle effect
  • Multiplicity scaling
  • Participant scaling

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Scaling properties of the mean multiplicity and pseudorapidity density in e <sup>−</sup> +e <sup>+</sup> , e <sup>±</sup> +p, p(p) ¯ +p, p+a and a+A(b) collisions'. Together they form a unique fingerprint.

  • Cite this