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29 March 2024
 
  » arxiv » hep-ph/0409003

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Probing small-$x$ gluons by low-mass Drell-Yan pairs at colliders
George Fai ; Jianwei Qiu ; Xiaofei Zhang ;
Date 31 Aug 2004
Journal Phys.Rev. C71 (2005) 014901
Subject hep-ph
AffiliationKent State University), Jianwei Qiu (Iowa State University), and Xiaofei Zhang (Kent State University
AbstractThe transverse-momentum ($Q_T$) distribution of low-mass Drell-Yan pairs is calculated in QCD perturbation theory with all-order resummation of $alpha_s (alpha_s ln(Q^2_T/Q^2))^n$ type terms. We demonstrate that the rapidity distribution of low-mass Drell-Yan pairs at large-enough transverse momentum is an advantageous source of constraints on the gluon distribution and its nuclear dependence. We argue that low-mass Drell-Yan pairs in the forward region provide a good and clean probe of small-$x$ gluons at collider energies.
Source arXiv, hep-ph/0409003
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