Constituent quarks and systematic errors in mid-rapidity charged multiplicity $d{N}_{\mathrm{ch}}/d\eta$ 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 ($50\pm 5\%$ for PHENIX at RHIC). In A$+$A collisions where centrality is measured by the number of nucleon collisions, $N_{\mathrm{coll}}$, or the number of nucleon participants, $N_{\mathrm{part}}$, or the number of constituent quark participants, $N_{\mathrm{qp}}$, 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 $N_{\mathrm{part}}$, $N_{\mathrm{coll}}$ or $N_{\mathrm{qp}}$ 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. A recent example is presented in whether the mid-rapidity charged multiplicity per constituent quark participant $(d{N}_{\mathrm{ch}}/d\eta )/N_{\mathrm{qp}}$ in Au$+$Au at RHIC was the same as the value in p$+$p collisions.

arXiv comment12 pages, 10 figures. arXiv admin note: text overlap with arXiv:1705.07925

References in corpus (14)

• The electric and magnetic form factors of the proton
• Centrality Dependence of Charged Particle Multiplicity in Au-Au Collisions at sqrt(s_NN)=130 GeV
• Inclusive cross section and double helicity asymmetry for π^0 production in p+p collisions at sqrt(s)=200 GeV: Implications for the polarized gluon distribution in the proton
• Measurement of the mid-rapidity transverse energy distribution from $\sqrt{s_{NN}}=130$ GeV Au+Au collisions at RHIC
• Glauber modeling of high-energy nuclear collisions at sub-nucleon level
• Quantitative Constraints on the Transport Properties of Hot Partonic Matter from Semi-Inclusive Single High Transverse Momentum Pion Suppression in Au+Au collisions at sqrt(s_NN) = 200 GeV
• Transverse energy production and charged-particle multiplicity at midrapidity in various systems from $\sqrt{s_{NN}}=7.7$ to 200 GeV
• Nucleon participants or quark participants?
• Scaling of Particle and Transverse Energy Production in 208Pb+208Pb collisions at 158 A GeV
• Transverse-energy distributions at midrapidity in $p$$+$$p$, $d$$+$Au, and Au$+$Au collisions at $\sqrt{s_{{}_{NN}}}=62.4$--200~GeV and implications for particle-production models
• Wounded quarks in A+A, p+A, and p+p collisions
• Tests of constituent-quark generation methods which maintain both the nucleon center of mass and the desired radial distribution in Monte Carlo Glauber models
• Rapidity Spectra of the Secondaries Produced in Heavy Ion Collisions and the Constituent Picture of the Particles
• Charged Particle Multiplicities in A+A and p+p Collisions in the Constituent Quarks Framework

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