0000000000846511

AUTHOR

G. Smirnov

showing 2 related works from this author

Backward electroproduction ofπ0mesons on protons in the region of nucleon resonances at four momentum transfer squaredQ2=1.0GeV2

2004

Exclusive electroproduction of pi{sup 0} mesons on protons in the backward hemisphere has been studied at Q2 = 1.0 GeV2 by detecting protons in the forward direction in coincidence with scattered electrons from the 4 GeV electron beam in Jefferson Lab's Hall A. The data span the range of the total (gamma*p) center-of-mass energy W from the pion production threshold to W = 2.0 GeV. The differential cross sections sigma{sub T} + epsilon sigma{sub L}, sigma{sub TL}, and sigma{sub TT} were separated from the azimuthal distribution and are presented together with the MAID and SAID parameterizations.

PhysicsNuclear and High Energy PhysicsParticle physicsMeson010308 nuclear & particles physicsNuclear TheoryHadronMomentum transferSigma01 natural sciencesNuclear physicsBaryonPion0103 physical sciencesHigh Energy Physics::ExperimentNuclear Experiment010306 general physicsNucleonLeptonPhysical Review C
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Measurement of the spin-dependent structure function g1(x) of the deuteron

1993

We report on the first measurement of the spin-dependent structure function g1d of the deuteron in the deep inelastic scattering of polarised muons off polarised deuterons, in the kinematical range 0.006<x<0.6, 1 GeV2<Q2<30 GeV2. The first moment, Γ1d=sh{phonetic}01 g1d dx=0.023±0.020 (stat.) ± 0.015 (syst.), is smaller than the prediction of the Ellis-Jaffe sum rules. Using earlier measurements of g1p, we infer the first moment of the spin-dependent neutron structure function g1n. The difference Γ1p-Γ1n=0.20 ±0.05 (stat.) ± 0.04 (syst.) agrees with the prediction of the Bjorken sum rule, Γ1p-Γ1n=0.191 ±0.002.

deuteron: polarized targetNuclear and High Energy PhysicsINELASTIC E-P; POLARIZED PROTONS; SUM-RULE; SCATTERING; ELECTROPRODUCTION; ASYMMETRYINELASTIC E-PProtonpolarized target: deuterondeep inelastic scattering: muon deuteronstructure function: spinmuon deuteron: deep inelastic scatteringSUM-RULE530Nuclear physicsINELASTIC E-P; POLARIZED PROTONS; SUM-RULE; SCATTERING; ELECTROPRODUCTION; ASYMMETRY; MODELTheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITYSCATTERINGNeutronpolarized beam: muonSpin-½PhysicsQuantum chromodynamicsspin: structure functionMuonScatteringdeuteron: structure functionELECTROPRODUCTIONnucleon: structure functionCERN SPSDeep inelastic scatteringmomentmagnetic spectrometer: experimental resultsPOLARIZED PROTONSapprox. 100 GeVASYMMETRYSum rule in quantum mechanicsmuon: polarized beamParticle Physics - ExperimentPhysics Letters B
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