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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 ( 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:
 [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.:
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}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 12 works
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Figures / Tables:

Figure 1 Figure 1: (a) ⟨Nch⟩ vs. collision energy for e+e+, $$p(\bar{p})+p$$ and e±+p collisions; (b) [⟨Nch⟩ /Npp]1/3 vs. collision energy; (c) [⟨Nch⟩ /Npp]1/3 vs. $$κ_n\sqrt{s}$$ for the $$κ_n$$ values indicated. The curves are drawn to guide the eye.

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Works referenced in this record:

Charged-particle multiplicities in proton–proton collisions at $$\sqrt{s} = 0.9$$ s = 0.9 to 8 TeV
journal, January 2017


Color glass condensate at the LHC: hadron multiplicities in pp, pA and AA collisions
journal, January 2005


The hadronic interaction model EPOS
journal, January 2008


Review of Particle Physics
journal, July 2010


Rapidity-gap separation and study of single-diffraction dissociation in pp collisions at 12 and 24 GeV/c
journal, July 1974


Observation of long-range, near-side angular correlations in pPb collisions at the LHC
journal, January 2013


On the rise of proton–proton cross-sections at high energies
journal, May 2013


Mean charged hadron multiplicities in high-energy collisions
journal, March 1976


Scaling violations in multiplicity distributions at 200 and 900 GeV
journal, February 1986


A study of the general characteristics of proton-antiproton collisions at √s=0.2 to 0.9 TeV
journal, May 1990


Transverse-Momentum and Pseudorapidity Distributions of Charged Hadrons in p p Collisions at s = 7 TeV
journal, July 2010


Quark Structure of Hadrons and high Energy Collisions
journal, June 2003


Long-range angular correlations on the near and away side in p–Pb collisions at <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msqrt><mml:msub><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">NN</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>5.02</mml:mn><mml:mtext> TeV</mml:mtext></mml:math>
journal, February 2013


Heavy-ion collisions at the LHC—Last call for predictions
journal, April 2008


Charged-particle multiplicity measurement in proton–proton collisions at $\sqrt{s}=0.9$ and 2.36 TeV with ALICE at LHC
journal, June 2010


Measurements of Elliptic and Triangular Flow in High-Multiplicity He 3 + Au Collisions at s N N = 200    GeV
journal, September 2015


Relating High-Energy Lepton-Hadron, Proton-Nucleus, and Nucleus-Nucleus Collisions through Geometric Scaling
journal, January 2005


Glauber Modeling in High-Energy Nuclear Collisions
journal, November 2007


Wounded quarks and diquarks in heavy ion collisions
journal, June 2007


Observation of long-range, near-side angular correlations in proton-proton collisions at the LHC
journal, September 2010


Bose-Einstein Correlations of Charged Pion Pairs in A u + A u Collisions at s N N = 200 G e V
journal, October 2004


Measurement of the centrality dependence of the charged particle pseudorapidity distribution in lead–lead collisions at <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msqrt><mml:msub><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">NN</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>2.76</mml:mn><mml:mtext> TeV</mml:mtext></mml:math> with the ATLAS detector
journal, April 2012


Evolution of ep fragmentation and multiplicity distributions in the Breit frame
journal, October 1997


Evidence of the same multiparticle production mechanism in p−p collisions as in e+e− annihilation
journal, May 1980


Dependence on pseudorapidity and on centrality of charged hadron production in PbPb collisions at $ \sqrt {{{s_{\text{NN}}}}} = 2.76 $ TeV
journal, August 2011


Centrality Dependence of the Charged-Particle Multiplicity Density at Midrapidity in Pb-Pb Collisions at s NN = 2.76 TeV
journal, January 2011


Inclusive charged hadron elliptic flow in Au + Au collisions at s N N = 7.7 –39 GeV
journal, November 2012


Nucleon participants or quark participants?
journal, June 2003


Pseudorapidity distribution of charged hadrons in proton–proton collisions at s = 13  TeV
journal, December 2015


Charged-particle multiplicity in proton–proton collisions
journal, July 2010


Multiplicity moments in deep inelastic scattering at HERA
journal, June 2001


Pseudorapidity distributions of charged particles in d+Au and p+p collisions at
journal, July 2004


Works referencing / citing this record:

Glauber Monte Carlo predictions for ultrarelativistic collisions with O 16
journal, December 2019


Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.