2009/12/07 by Zhong-Bo Kang, Jian-Wei Qiu · 29 citations
Physics and Astronomy · #Asymmetry #Drell–Yan process #Hadron #High-Energy Particle Collisions Research #Invariant (physics) #Invariant mass #Lepton #Mathematical physics #Nuclear physics #Pair production #Particle physics #Particle physics theoretical and experimental studies #Parton #Physics #Production (economics) #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Rapidity #Universality (dynamical systems) #hep-ph
paper · pdf · doi:10.1103/physrevd.81.054020
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 81(5) (American Physical Society) · 8 pages, 3 figures
arxiv created 2009/12/07 · openalex publication_date 2010/03/18 · arxiv updated 2010/04/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Using the latest quark Sivers functions extracted from the global analysis of available data on single transverse spin asymmetry (SSA), we calculate the SSA of Drell-Yan inclusive production of lepton pairs of invariant mass Q at both 4<Q<9 GeV and Q\ensuremath∼MZ in p^\ensuremath\uparrowp collisions at Relativistic Heavy Ion Collider energies. We find that the features of the asymmetry AN for Q\ensuremath∼MZ are significantly different from that when 4<Q<9 GeV. The AN near Z0 pole is positive and sizable in the central rapidity region, while the AN at low Q is negative and only sizable in the forward rapidity region. We show that the size of AN is sufficiently large for a wide range of Q around the Z0 pole, and even with the lepton pair's invariant mass integrated from Q=70 GeV to 110 GeV, the AN is still close to 10% for the central and near forward rapidity region. We argue that the SSAs of Drell-Yan inclusive dilepton production at low Q, and that near the Z0 pole, provide complementary information for testing the time-reversal modified universality (the sign change) of the Sivers functions.