Helicity and Transversity Distributions at HERMES

Journal Article · Thu Feb 10 04:00:00 EST 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1871655· OSTI ID:20630611

De Nardo, Lara ^[1]

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1. DESY, Notkestrasse 85, 22607 Hamburg (Germany)

Results obtained by the HERMES Collaboration for the polarized parton distributions {delta}u, {delta}d, {delta}u-bar, {delta}d-bar, {delta}s extracted from inclusive and semi-inclusive asymmetries on H and D in a LO analysis are presented. The up and down distributions are measured with good precision and are determined to be positive and negative respectively. The sea distributions have been extracted for the first time and the strange sea is consistent with zero within errors.Single spin asymmetries on transversely polarized hydrogen target provide evidence of transversity distributions.

• OSTI ID: 20630611
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 747; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCURACY
ASYMMETRY
DEEP INELASTIC SCATTERING
DISTRIBUTION
ERRORS
FOUR MOMENTUM TRANSFER
HELICITY
HYDROGEN 1 TARGET
PARTICLE KINEMATICS
PARTONS
POLARIZATION
POLARIZED TARGETS
SEMI-INCLUSIVE INTERACTIONS
SPIN