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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

Abstract

The charged-particle pseudorapidity density ( d N 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 d N 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 d N 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 d N 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.

Authors:
 [1];  [1];  [1];  [2];  [1];  [1];  [1];  [3]
  1. Stony Brook Univ., Stony Brook, NY (United States)
  2. Stony Brook Univ., Stony Brook, NY (United States); Lorand Univ. (Hungary)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
The State Univ. of New York, Stony Brook, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1499009
Grant/Contract Number:  
FG02-87ER40331
Resource Type:
Accepted Manuscript
Journal Name:
Universe
Additional Journal Information:
Journal Volume: 4; Journal Issue: 1; Journal ID: ISSN 2218-1997
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; multiplicity scaling; leading particle effect; effective energy; participant scaling

Citation Formats

Lacey, Roy, Liu, Peifeng, Magdy, Niseem, Csanád, Máté, Schweid, Benjamin, Ajitanand, Nuggehalli, Alexander, John, and Pak, Robert. Scaling Properties of the Mean Multiplicity and Pseudorapidity Density in e–+e+, e±+p, p( p ¯ )+p, p+A and A+A(B) Collisions. United States: N. p., 2018. Web. doi:10.3390/universe4010022.
Lacey, Roy, Liu, Peifeng, Magdy, Niseem, Csanád, Máté, Schweid, Benjamin, Ajitanand, Nuggehalli, Alexander, John, & Pak, Robert. Scaling Properties of the Mean Multiplicity and Pseudorapidity Density in e–+e+, e±+p, p( p ¯ )+p, p+A and A+A(B) Collisions. United States. doi:10.3390/universe4010022.
Lacey, Roy, Liu, Peifeng, Magdy, Niseem, Csanád, Máté, Schweid, Benjamin, Ajitanand, Nuggehalli, Alexander, John, and Pak, Robert. Mon . "Scaling Properties of the Mean Multiplicity and Pseudorapidity Density in e–+e+, e±+p, p( p ¯ )+p, p+A and A+A(B) Collisions". United States. doi:10.3390/universe4010022. https://www.osti.gov/servlets/purl/1499009.
@article{osti_1499009,
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},
author = {Lacey, Roy and Liu, Peifeng and Magdy, Niseem and Csanád, Máté and Schweid, Benjamin and Ajitanand, Nuggehalli and Alexander, John and Pak, Robert},
abstractNote = {The charged-particle pseudorapidity density ( dNch/dη ) for p( p¯ )+p, p+A and A+A(B) collisions and the mean multiplicity < Nch > 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 dNch/dη and < Nch > , 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 dNch/dη and < Nch > are observed to factorize into contributions that depend on log(√s) and the number of nucleon or quark participant pairs Npp. Here the quantification of these contributions gives expressions that serve to systematize dNch/dη and < Nch > measurements spanning nearly 4 orders of magnitude in s√ and to predict their values as a function of √s and Npp.},
doi = {10.3390/universe4010022},
journal = {Universe},
number = 1,
volume = 4,
place = {United States},
year = {2018},
month = {1}
}

Journal Article:
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