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

Journal Article · · Physical Review C

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.

Research Organization:
Univ. of Illinois, Chicago, IL (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
FG02-94ER40865; AC05-00OR22725
OSTI ID:
1438506
Alternate ID(s):
OSTI ID: 1665948; OSTI ID: 1666139
Report Number(s):
DOE-UIC-ER40865-X15; PRVCAN; 054910
Journal Information:
Physical Review C, Journal Name: Physical Review C Vol. 97 Journal Issue: 5; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 124 works
Citation information provided by
Web of Science

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