Recent COMPASS Results on Transverse Physics

Journal Article · Wed Dec 14 04:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3667304· OSTI ID:22004004

Iwata, Takahiro ^[1]

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1. Yamagata University, Kojirakawa, 1-4-12, Yamagata, 990-8560 (Japan)

The investigation of transverse spin and transverse momentum dependent effects in deep inelastic scattering of muons off nucleons is one of the key physics programs of the COMPASS collaboration at CERN. We have investigated the effects from the data obtained with a polarized proton target. In order to access the transversity distribution function, following channels have been analyzed: The azimuthal distribution of single hadrons, the azimuthal dependence of the plane containing hadron pairs, and the measurement of the transverse polarization of lambda hyperons in the final state. The Sivers distribution function which is one of the transverse momentum dependent functions has been investigated also from the azimuthal distribution of single hadrons. Azimuthal asymmetries in unpolarized deep inelastic scattering give important information on the inner structure of the nucleon to access the so-far unmeasured Boer-Mulders function. We have measured these asymmetries using spin-averaged {sup 6}L{sub i}D.

• OSTI ID: 22004004
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1418; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASYMMETRY
CERN SPS SYNCHROTRON
DEEP INELASTIC SCATTERING
DISTRIBUTION FUNCTIONS
HYPERONS
MUON-NUCLEON INTERACTIONS
MUONS
PARTICLE STRUCTURE
POLARIZATION
POLARIZED TARGETS
PROTONS
SPIN
TRANSVERSE MOMENTUM