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 ( 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.
- Authors:
-
- 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)
- Publication Date:
- Research Org.:
- Stony Brook Univ., NY (United States); State Univ. of New York (SUNY), Syracuse, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1499009
- Grant/Contract Number:
- FG02-87ER40331
- Resource Type:
- Journal Article: 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. https://doi.org/10.3390/universe4010022
Lacey, Roy, Liu, Peifeng, Magdy, Niseem, Csanád, Máté, Schweid, Benjamin, Ajitanand, Nuggehalli, Alexander, John, and Pak, Robert. 2018.
"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. https://doi.org/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},
url = {https://www.osti.gov/biblio/1499009},
journal = {Universe},
issn = {2218-1997},
number = 1,
volume = 4,
place = {United States},
year = {Mon Jan 22 00:00:00 EST 2018},
month = {Mon Jan 22 00:00:00 EST 2018}
}
Web of Science
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