Nuclear gluons at RHIC in a multiobservable approach

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http://hdl.handle.net/10138/310228

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Helenius , I , Lajoie , J , Osborn , J D , Paakkinen , P & Paukkunen , H 2019 , ' Nuclear gluons at RHIC in a multiobservable approach ' , Physical Review D , vol. 100 , no. 1 , 014004 . https://doi.org/10.1103/PhysRevD.100.014004

Title: Nuclear gluons at RHIC in a multiobservable approach
Author: Helenius, Ilkka; Lajoie, John; Osborn, Joseph D.; Paakkinen, Petja; Paukkunen, Hannu
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
Date: 2019-07-08
Language: eng
Number of pages: 11
Belongs to series: Physical Review D
ISSN: 2470-0010
URI: http://hdl.handle.net/10138/310228
Abstract: We explore the possibility of measuring nuclear gluon distributions at the Relativistic Heavy-Ion Collider (RHIC) with root s = 200 GeV proton-nucleus collisions. In addition to measurements at central rapidity, we consider also observables at forward rapidity, consistent with proposed upgrades to the experimental capabilities of STAR and sPHENIX. The processes we consider consist of Drell-Yan dilepton, dijet, and direct photon jet production. The Drell-Yan process is found to be an efficient probe of gluons at small momentum fractions. In order to fully utilize the potential of Drell-Yan measurements we demonstrate how the overall normalization uncertainty present in the experimental data can be fixed using other experimental observables. An asset of the RHIC collider is its flexibility to run with different ion beams, and we outline how this ability could be taken advantage of to measure the A dependence of gluon distributions for which the current constraints are scarce.
Subject: 114 Physical sciences
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