Latest Results from DVCS at HERMES

Journal Article · Mon Mar 23 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3122167· OSTI ID:21293430

Yaschenko, Sergey ^[1]

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1. Physikalisches Institut II, Friedrich-Alexander Universitaet Erlangen-Nuernberg, Erwin-Rommel Str. 1, 91058 Erlangen (Germany)

The HERMES experiment at DESY, Hamburg, collected a rich data set for the analysis of Deeply Virtual Compton Scattering (DVCS) utilizing the HERA polarized electron or positron beams with an energy of 27.6 GeV and longitudinally and transversely polarized or unpolarized gas targets (H, D or heavier nuclei). The azimuthal asymmetries measured in the exclusive DVCS process allow the access to the imaginary and/or real part of certain combinations of Generalized Parton Distributions. Before the end of 2005 the recoiling target protons from the DVCS reaction were not detected and exclusivity was ensured indirectly using the missing-mass method. A Recoil Detector was installed in winter 2005-2006 to improve the exclusivity of such reactions at the event level by direct measurement of recoil protons. Latest results on combined analyses of beam-spin and beam-charge asymmetries and of beam-charge and transverse-target spin asymmetries are presented together with first results from the HERMES Recoil Detector.

• OSTI ID: 21293430
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1105; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
COMPTON EFFECT
DESY
DEUTERIUM TARGET
ELECTRONS
GEV RANGE
GLUONS
HERA STORAGE RING
HYDROGEN 1 TARGET
MISSING MASS
POLARIZATION
POLARIZED BEAMS
POLARIZED TARGETS
POSITRON BEAMS
PROTONS
QUARKS
SPIN