A common fit to the world data allows a separation of all flavors: a3, a8, DS, Dg ! ... Sign of DG is mainly determined by the low x behavior of g1(x) Leader, ...
DAPNIA-laboratory, CEA-Saclay, France. For the COMPASS collaboration ... SciFi. Gems. Drift chambers. Straws. MWPC. Polarized beam and target ~75% 50% SAT, LAT, ...
Algorithm needed for the systematic treatment of soft and collinear singularities at NNLO QCD ... every contribution contains soft- or collinear divergencies ...
DIS off quark and gluon can be studied with perturbative QCD, with calculating ... Alternatively DGLAP fails at x 0.05 when the simplest, bare quark fit is used. ...