Longitudinal double spin asymmetry in jet production at STAR

Details Longitudinal double spin asymmetry in jet production at STAR Longitudinal double spin asymmetry in jet production at STAR

2007-06-18

arxiv.org/abs/0706.2667v1

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, 1 figure

Scientific paper

We present recent measurements of the longitudinal double-spin asymmetry A_LL for the inclusive production of jets at midrapidity in polarized proton-proton collisions at sqrt(s)=200GeV. The data amount to an integrated luminosity of 3pb-1 and were collected with the STAR detector at the Relativistic Heavy Ion Collider during the year 2005 with average beam polarizations of about 50%. The ALL measurements cover jet transverse momenta 5 < pT < 30 GeV/c expanding the pT coverage over previously published data. The results will be compared with perturbative QCD evaluations and shown to provide sensitive constraints on the gluon spin contribution to the nucleon spin.

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