Single transverse spin asymmetry of dilepton production near Z{sup 0} pole

Journal Article · Mon Mar 01 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.054020· OSTI ID:21409852

Zhongbo, Kang; Jianwei, Qiu ^[1]

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1. RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973 (United States)

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{approx}M{sub Z} in p{sup {up_arrow}p} collisions at Relativistic Heavy Ion Collider energies. We find that the features of the asymmetry A{sub N} for Q{approx}M{sub Z} are significantly different from that when 4<Q<9 GeV. The A{sub N} near Z{sup 0} pole is positive and sizable in the central rapidity region, while the A{sub N} at low Q is negative and only sizable in the forward rapidity region. We show that the size of A{sub N} is sufficiently large for a wide range of Q around the Z{sup 0} pole, and even with the lepton pair's invariant mass integrated from Q=70 GeV to 110 GeV, the A{sub N} 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 Z{sup 0} pole, provide complementary information for testing the time-reversal modified universality (the sign change) of the Sivers functions.

• OSTI ID: 21409852
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 5; Other Information: DOI: 10.1103/PhysRevD.81.054020; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BROOKHAVEN RHIC
COLLISIONS
COMPUTERIZED SIMULATION
DRELL MODEL
GEV RANGE 10-100
LEPTONS
MASS
PAIR PRODUCTION
PARTICLE RAPIDITY
QUARKS
SPIN
ACCELERATORS
ANGULAR MOMENTUM
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
HEAVY ION ACCELERATORS
INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
SIMULATION
STORAGE RINGS