skip to main content

DOE PAGESDOE PAGES

This content will become publicly available on January 10, 2019

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

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:
Report Number(s):
BNL-200047-2018-JAAM
Journal ID: ISSN 0217-7323
Grant/Contract Number:
SC0012704
Type:
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
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1425125