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Title: Constituent quarks and systematic errors in mid-rapidity charged multiplicity dN ch/dη distributions

Abstract

Centrality definition in A + A collisions at colliders such as RHIC and LHC suffers from a correlated systematic uncertainty caused by the efficiency of detecting a p + p collision (50 ± 5% for PHENIX at RHIC). In A + A collisions where centrality is measured by the number of nucleon collisions, N coll, or the number of nucleon participants, N part, or the number of constituent quark participants, N qp, the error in the efficiency of the primary interaction trigger (Beam–Beam Counters) for a p + p collision leads to a correlated systematic uncertainty in N part, N coll or N qp which reduces binomially as the A + A collisions become more central. If this is not correctly accounted for in projections of A + A to p + p collisions, then mistaken conclusions can result. Finally, a recent example is presented in whether the mid-rapidity charged multiplicity per constituent quark participant d(N ch/dη)/N qp in Au + Au at RHIC was the same as the value in p + p collisions.

Authors:
 [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Dept.
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1425125
Report Number(s):
BNL-200047-2018-JAAM
Journal ID: ISSN 0217-7323
Grant/Contract Number:  
SC0012704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Modern Physics Letters A
Additional Journal Information:
Journal Volume: 33; Journal Issue: 01; Journal ID: ISSN 0217-7323
Publisher:
World Scientific Publishing
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Tannenbaum, M. J. Constituent quarks and systematic errors in mid-rapidity charged multiplicity dNch/dη distributions. United States: N. p., 2018. Web. doi:10.1142/S021773231830001X.
Tannenbaum, M. J. Constituent quarks and systematic errors in mid-rapidity charged multiplicity dNch/dη distributions. United States. doi:10.1142/S021773231830001X.
Tannenbaum, M. J. Wed . "Constituent quarks and systematic errors in mid-rapidity charged multiplicity dNch/dη distributions". United States. doi:10.1142/S021773231830001X. https://www.osti.gov/servlets/purl/1425125.
@article{osti_1425125,
title = {Constituent quarks and systematic errors in mid-rapidity charged multiplicity dNch/dη distributions},
author = {Tannenbaum, M. J.},
abstractNote = {Centrality definition in A + A collisions at colliders such as RHIC and LHC suffers from a correlated systematic uncertainty caused by the efficiency of detecting a p + p collision (50 ± 5% for PHENIX at RHIC). In A + A collisions where centrality is measured by the number of nucleon collisions, Ncoll, or the number of nucleon participants, Npart, or the number of constituent quark participants, Nqp, the error in the efficiency of the primary interaction trigger (Beam–Beam Counters) for a p + p collision leads to a correlated systematic uncertainty in Npart, Ncoll or Nqp which reduces binomially as the A + A collisions become more central. If this is not correctly accounted for in projections of A + A to p + p collisions, then mistaken conclusions can result. Finally, a recent example is presented in whether the mid-rapidity charged multiplicity per constituent quark participant d(Nch/dη)/Nqp in Au + Au at RHIC was the same as the value in p + p collisions.},
doi = {10.1142/S021773231830001X},
journal = {Modern Physics Letters A},
issn = {0217-7323},
number = 01,
volume = 33,
place = {United States},
year = {2018},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 1 work
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Figures / Tables:

Figure 1 Figure 1: a) (left) PHENIX5 transverse energy density per participant (dET/dη)/Npart for Au+Au at $\sqrt{{s}_{NN}}$ = 130 GeV as a function of Npart, compared to the data6 of WA98 for Pb+Pb collisions at $\sqrt{{s}_{NN}}$ = 17.2 GeV. b) (right) ratio of (dET/dη)/ (dNch/dη).

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