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Title: Improved Monte Carlo Glauber predictions at present and future nuclear colliders

Abstract

We present the results of an improved Monte Carlo Glauber (MCG) model of relevance for collisions involving nuclei at center-of-mass energies of the BNL Relativistic Heavy Ion Collider ( s NN = 0.2 TeV), CERN Large Hadron Collider (LHC) ( s NN = 2.76 8.8 TeV ), and proposed future hadron colliders ( s NN 10 63 TeV). The inelastic p p cross sections as a function of s NN are obtained from a precise data-driven parametrization that exploits the many available measurements at LHC collision energies. We describe the nuclear density of a lead nucleus with two separated two-parameter Fermi distributions for protons and neutrons to account for their different densities close to the nuclear periphery. Furthermore, we model the nucleon degrees of freedom inside the nucleus through a lattice with a minimum nodal separation, combined with a “recentering and reweighting” procedure, that overcomes some limitations of previous MCG approaches. The nuclear overlap function, number of participant nucleons and binary nucleon-nucleon collisions, participant eccentricity and triangularity, overlap area, and average path length are presented in intervals of percentile centrality for lead-lead (PbPb) and proton-lead ( p Pb ) collisions at all collision energies. We demonstrate for collisions at s NN = 5.02 TeV that the central values of the Glauber quantities change by up to 7% in a few bins of reaction centrality, due to the improvements implemented, though typically they remain within the previously assigned systematic uncertainties, while their new associated uncertainties are generally smaller (mostly below 5%) at all centralities than for earlier calculations. Tables for all quantities versus centrality at present and foreseen collision energies involving Pb nuclei, as well as for collisions of XeXe at s NN = 5.44 TeV , and AuAu and CuCu at s NN = 0.2 TeV , are provided. The source code for the improved Monte Carlo Glauber model is made publicly available.

Authors:
; ;
Publication Date:
Research Org.:
Univ. of Illinois, Chicago, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1438506
Alternate Identifier(s):
OSTI ID: 1665948; OSTI ID: 1666139
Report Number(s):
DOE-UIC-ER40865-X15
Journal ID: ISSN 2469-9985; PRVCAN; 054910
Grant/Contract Number:  
FG02-94ER40865; AC05-00OR22725
Resource Type:
Published Article
Journal Name:
Physical Review C
Additional Journal Information:
Journal Name: Physical Review C Journal Volume: 97 Journal Issue: 5; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Loizides, Constantin, Kamin, Jason, and d'Enterria, David. Improved Monte Carlo Glauber predictions at present and future nuclear colliders. United States: N. p., 2018. Web. https://doi.org/10.1103/PhysRevC.97.054910.
Loizides, Constantin, Kamin, Jason, & d'Enterria, David. Improved Monte Carlo Glauber predictions at present and future nuclear colliders. United States. https://doi.org/10.1103/PhysRevC.97.054910
Loizides, Constantin, Kamin, Jason, and d'Enterria, David. Wed . "Improved Monte Carlo Glauber predictions at present and future nuclear colliders". United States. https://doi.org/10.1103/PhysRevC.97.054910.
@article{osti_1438506,
title = {Improved Monte Carlo Glauber predictions at present and future nuclear colliders},
author = {Loizides, Constantin and Kamin, Jason and d'Enterria, David},
abstractNote = {We present the results of an improved Monte Carlo Glauber (MCG) model of relevance for collisions involving nuclei at center-of-mass energies of the BNL Relativistic Heavy Ion Collider (sNN=0.2 TeV), CERN Large Hadron Collider (LHC) (sNN=2.76–8.8TeV), and proposed future hadron colliders (sNN≈10–63 TeV). The inelastic pp cross sections as a function of sNN are obtained from a precise data-driven parametrization that exploits the many available measurements at LHC collision energies. We describe the nuclear density of a lead nucleus with two separated two-parameter Fermi distributions for protons and neutrons to account for their different densities close to the nuclear periphery. Furthermore, we model the nucleon degrees of freedom inside the nucleus through a lattice with a minimum nodal separation, combined with a “recentering and reweighting” procedure, that overcomes some limitations of previous MCG approaches. The nuclear overlap function, number of participant nucleons and binary nucleon-nucleon collisions, participant eccentricity and triangularity, overlap area, and average path length are presented in intervals of percentile centrality for lead-lead (PbPb) and proton-lead (pPb) collisions at all collision energies. We demonstrate for collisions at sNN=5.02TeV that the central values of the Glauber quantities change by up to 7% in a few bins of reaction centrality, due to the improvements implemented, though typically they remain within the previously assigned systematic uncertainties, while their new associated uncertainties are generally smaller (mostly below 5%) at all centralities than for earlier calculations. Tables for all quantities versus centrality at present and foreseen collision energies involving Pb nuclei, as well as for collisions of XeXe at sNN=5.44TeV, and AuAu and CuCu at sNN=0.2TeV, are provided. The source code for the improved Monte Carlo Glauber model is made publicly available.},
doi = {10.1103/PhysRevC.97.054910},
journal = {Physical Review C},
number = 5,
volume = 97,
place = {United States},
year = {2018},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevC.97.054910

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