Institut de recherche sur les lois fondamentales de l'Univers

ATTENTION: JOUR INHABITUEL

A rich set of azimuthal asymmetries related to beam charge, beam helicity and target

spin have been extracted at HERMES in DVCS off unpolarized, longitudinally or transversely

polarized proton, unpolarized or longitudinally polarized deuteron, and nuclear targets.

For the last two years of data taking in 2006 and 2007, a recoil detector was integrated

into HERMES, which allowed for the detection of the recoiling proton and consequently for

the separation of "pure" DVCS events from those with resonant production. The latter

events remained part of the signal in earlier data sets.