Search results for "spin structure function g1"

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The Deuteron Spin-dependent Structure Function g1(d) and its First Moment

2007

We present a measurement of the deuteron spin-dependent structure function g1d based on the data collected by the COMPASS experiment at CERN during the years 2002-2004. The data provide an accurate evaluation for Gamma_1^d, the first moment of g1d(x), and for the matrix element of the singlet axial current, a0. The results of QCD fits in the next to leading order (NLO) on all g1 deep inelastic scattering data are also presented. They provide two solutions with the gluon spin distribution function Delta G positive or negative, which describe the data equally well. In both cases, at Q^2 = 3 (GeV/c)^2 the first moment of Delta G is found to be of the order of 0.2 - 0.3 in absolute value.

Nuclear and High Energy PhysicsParticle physicsg(1)FOS: Physical sciencesAbsolute valuespinspin structure function g101 natural sciencesCOMPASSHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)polarised deep inelastic scatteringdeep inelastic scatteringstructure function0103 physical sciencesCOMPASS experimentA(1)polarised deep inelastic scattering; COMPASS; spin structure function g1; QCD analysisSinglet state010306 general physicsSpin-½Quantum chromodynamicsPhysics010308 nuclear & particles physicsDeep inelastic scatteringGluonQCD analysisDistribution functionHigh Energy Physics::ExperimentParticle Physics - Experiment
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