Diffractive vector meson production at COMPASS and plans for GPDs measurements

Journal Article · Tue Jul 11 00:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2220266· OSTI ID:20873307

Sandacz, Andrzej ^[1]

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1. Soltan Institute for Nuclear Studies, ul. Hoza 69, 00681 Warsaw (Poland)

Preliminary results on the spin dependence of exclusive {rho}0 muoproduction at COMPASS are discussed. The Q2 dependence of several spin density matrix elements and of R = {sigma}L/{sigma}T is presented. The data are consistent with a substantial increase of R with Q2 and a weak violation of SCHC. Next, the longitudinal double-spin asymmetry A{sub 1}{sup {rho}} for {rho}0 production on polarized deuterons is shown as a function of Q2 and xBj. The asymmetry is compatible with zero in the whole kinematical range. Finally, we discuss the prospects for measuring DVCS and exclusive meson production at COMPASS in order to investigate GPDs.

• OSTI ID: 20873307
• Journal Information: AIP Conference Proceedings, Vol. 842, Issue 1; Conference: 17. international conference on particles and nuclei, Santa Fe, NM (United States), 23-30 Oct 2005; Other Information: DOI: 10.1063/1.2220266; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
CERN SPS SYNCHROTRON
DENSITY MATRIX
DEUTERIUM TARGET
DEUTERONS
FOUR MOMENTUM TRANSFER
MULTIPARTICLE SPECTROMETERS
MUON REACTIONS
PARTICLE IDENTIFICATION
PARTICLE KINEMATICS
PARTICLE PRODUCTION
POLARIZATION
POLARIZED TARGETS
RHO-770 MESONS
SPIN