Abstract
During its 2011 data taking campaign, the COMPASS experiment at CERN has collected data of 200 GeV polarised muons scattering off a target with polarised protons. These data allow the extension of the phase-space coverage of the COMPASS data obtained in 2007 with a beam of 160 GeV polarised muons, namely to access lower values of x for any given value of Q2.The data in the DIS region were used to extract the longitudinal double spin asymmetry A1p and the spin dependent structure function g1p. Thereafter, our world data NLO QCD fits of polarised parton distributions were updated. It was also possible to improve our test on the Bjorken sum rule.The asymmetries A1p and the structure function g1p were likewise extracted from the two beam energy data sets for Q2<1(GeV/c)2, thus complementing our extraction of similar quantities in the non-perturbative region for the deuteron.
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