Extracting the Sivers function from polarized semi-inclusive deep inelastic scattering data and making predictions

Journal Article · Tue Nov 01 04:00:00 EST 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.094007· OSTI ID:20713821

Anselmino, M; Boglione, M; Prokudin, A ^[1]; D'Alesio, U; Murgia, F ^[2]; Kotzinian, A ^[3]

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1. Dipartimento di Fisica Teorica, Universita di Torino and INFN, Sezione di Torino, Via P. Giuria 1, I-10125 Torino (Italy)
2. INFN, Sezione di Cagliari and Dipartimento di Fisica, Universita di Cagliari, C.P. 170, I-09042 Monserrato, Cagliari (Italy)
3. Dipartimento di Fisica Generale, Universita di Torino and INFN, Sezione di Torino, Via P. Giuria 1, I-10125 Torino (Italy)

The most recent data on the weighted transverse single spin asymmetry A{sub UT}{sup sin({phi}{sub h}{sup -}{phi}{sub S})} from HERMES and COMPASS Collaborations are analyzed within the LO parton model with unintegrated parton distribution and fragmentation functions; all transverse motions are taken into account, with exact kinematics, in the elementary interactions. The overall quality of the data is such that, for the first time, a rather well constrained extraction of the Sivers function for u and d quarks is possible and is performed. Comparisons with models are made. Based on the extracted Sivers functions, predictions for A{sub UT}{sup sin({phi}{sub h}{sup -}{phi}{sub S})} asymmetries at JLab are given; suggestions for further measurements at COMPASS, with a transversely polarized hydrogen target and selecting favorable kinematical ranges, are discussed. Predictions are also presented for single spin asymmetries in Drell-Yan processes at the Relativistic Heavy Ion Collider and the Facility for Antiproton and Ion Research at GSI-Darmstadt.

• OSTI ID: 20713821
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 72; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTIPROTONS
ASYMMETRY
BROOKHAVEN RHIC
CEBAF ACCELERATOR
D QUARKS
DEEP INELASTIC SCATTERING
DISTRIBUTION
DRELL MODEL
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
POLARIZATION
POLARIZED TARGETS
SEMI-INCLUSIVE INTERACTIONS
SPIN