Scaling Properties of the Mean Multiplicity and Pseudorapidity Density in e–+e+, e±+p, p( p ¯ )+p, p+A and A+A(B) Collisions

Lacey, Roy; Liu, Peifeng; Magdy, Niseem; Csanád, Máté; Schweid, Benjamin; Ajitanand, Nuggehalli; Alexander, John; Pak, Robert

doi:10.3390/universe4010022

Title: Scaling Properties of the Mean Multiplicity and Pseudorapidity Density in e^–+e⁺, e^±+p, p( p ¯ )+p, p+A and A+A(B) Collisions

Journal Article · Mon Jan 22 00:00:00 EST 2018 · Universe

DOI:https://doi.org/10.3390/universe4010022· OSTI ID:1499009

Lacey, Roy ^[1]; Liu, Peifeng ^[1]; Magdy, Niseem ^[1]; Csanád, Máté ^[2]; Schweid, Benjamin ^[1]; Ajitanand, Nuggehalli ^[1]; Alexander, John ^[1]; Pak, Robert ^[3]

Stony Brook Univ., Stony Brook, NY (United States)
Stony Brook Univ., Stony Brook, NY (United States); Lorand Univ. (Hungary)
Brookhaven National Lab. (BNL), Upton, NY (United States)

The charged-particle pseudorapidity density ( dN_ch/dη ) for p( p¯ )+p, p+A and A+A(B) collisions and the mean multiplicity < N_ch > 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 < N_ch > , 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 < N_ch > are observed to factorize into contributions that depend on log(√s) and the number of nucleon or quark participant pairs N_pp. Here the quantification of these contributions gives expressions that serve to systematize dN_ch/dη and < N_ch > measurements spanning nearly 4 orders of magnitude in s√ and to predict their values as a function of √s and N_pp.

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Research Organization:: Stony Brook Univ., NY (United States); State Univ. of New York (SUNY), Syracuse, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: FG02-87ER40331

OSTI ID:: 1499009

Journal Information:: Universe, Vol. 4, Issue 1; ISSN 2218-1997

Publisher:: MDPICopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 12 works

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Title: Scaling Properties of the Mean Multiplicity and Pseudorapidity Density in e–+e+, e±+p, p( p ¯ )+p, p+A and A+A(B) Collisions

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