Measurement of the Contribution of Strange Quarks to the Proton Spin

Journal Article · Tue Aug 04 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3215651· OSTI ID:21316915

El Alaoui, A ^[1]

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1. Laboratoire de Physique Subatomique et de Cosmologie, IN2P3/CNRS-Universite Joseph Fourier-INP, 53 rue des Martyrs 38026 Grenoble (France)

An analysis of HERMES data for charged-kaon production in deep inelastic scattering from a polarized deuteron target was performed to access the momentum and helicity distributions of strange quarks in the nucleon. This measurement involves the determination of the inclusive double-spin asymmetry and of the semi inclusive double-spin asymmetry for kaons. The shape of the momentum distribution for strange quarks is found to be softer than that of the average of the light sea anti-quarks. The strange helicity distribution is consistent with zero in the region 0.02<x<0.3 and Q{sup 2}>1 GeV{sup 2}. Details of the analysis will be presented in this paper.

• OSTI ID: 21316915
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1149; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
DEEP INELASTIC SCATTERING
DEUTERIUM TARGET
FOUR MOMENTUM TRANSFER
HELICITY
KAONS MINUS
KAONS PLUS
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PARTICLE KINEMATICS
PARTICLE PRODUCTION
PARTICLE STRUCTURE
POLARIZATION
PROTONS
S QUARKS
SEMI-INCLUSIVE INTERACTIONS
SPIN