Double spin azimuthal asymmetries ALT and ALL in semi-inclusive DIS

Journal Article · Wed Jun 13 04:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2750826· OSTI ID:21063965

Kotzinian, Aram ^[1]; JINR, 141980 Dubna ^[2]

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1. Yerevan Physics Institute, 375036 Yerevan (Armenia)
2. Russian Federation

Within the LO QCD parton model of SIDIS, lN {yields} lhX, with unintegrated quark distribution and fragmentation functions, we study the transverse momentum and azimuthal dependencies of the double spin asymmetries ALT and ALL. For later we include O(k perpendicular)/Q) kinematic corrections, which induce an azimuthal modulation of the asymmetry, analogous to the Cahn effect in unpolarized SIDIS. We show that a study of these asymmetries allows to extract the transverse momentum dependence of the unintegrated helicity distribution function g{sub 1L}{sup q}(x,k{sub perpendicular}) and g{sub 1T}{sup q}(x,k{sub perpendicular}).This report is based on research published in [1, 2], where predictions are given for ongoing COMPASS, HERMES and JLab experiments.

• OSTI ID: 21063965
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 915; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
CEBAF ACCELERATOR
CORRECTIONS
DEEP INELASTIC SCATTERING
DISTRIBUTION FUNCTIONS
GLUON MODEL
HELICITY
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PARTICLE KINEMATICS
QUANTUM CHROMODYNAMICS
QUARK MODEL
QUARKS
SEMI-INCLUSIVE INTERACTIONS
SPIN
TRANSVERSE MOMENTUM