Wounded-quark emission function at the top energy available at the BNL Relativistic Heavy Ion Collider

Michał Barej,Adam Bzdak,Paweł Gutowski

doi:10.1103/physrevc.97.034901

Abstract

The wounded nucleon and quark emission functions are extracted for different centralities in d+Au collisions at $\sqrt{s}=200\ \text{GeV}$ using Monte Carlo simulations and experimental data. The shape of the emission function depends on centrality in the wounded nucleon model, whereas it is practically universal (within uncertainties) in the wounded quark model. Predictions for $dN_{ch}/d\eta$ distributions in p+Au and $^3$He+Au collisions are presented.

Highlights

The idea of a “wounded” source is commonly used to model the soft particle production in various hadronic collisions [1,2,3]
The wounded quark model [2], successfully applied to various colliding systems and at various energies [4,5,6,7,8,9,10,11,12], assumes that a heavy ion collision consists of independent quark-quark collisions and each constituent quark, undergoing inelastic collisions, is a wounded source
√In this paper we focus on deuteron-gold (d+Au) collisions at s = 200 GeV as experimentally studied by the PHOBOS and PHENIX Collaborations at the BNL Relativistic Heavy Ion Collider (RHIC) [17,18]

Summary

Introduction

The idea of a “wounded” source is commonly used to model the soft particle production in various hadronic collisions [1,2,3]. In this model, each wounded source populates particles independently of the number of collisions it undergoes. The wounded nucleon model [1] describes a nucleus-nucleus collision as a superposition of nucleon-nucleon interactions. It assumes that each nucleon participating in an inelastic collision is a wounded source. The number of wounded sources can assume different values [8] and, e.g., in Ref. [13], the wounded quark-diquark model was studied.

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Results

Conclusion