A NEW MEASUREMENT OF THE SPIN-DEPENDENT STRUCTURE-FUNCTION G(1)(X) OF THE DEUTERON

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We present a new measurement of the spin-dependent structure function g(1)(d) of the deuteron in deep inelastic scattering of 190 GeV polarised muons on polarised deuterons, in the kinematic range 0.003<x<0.7 and IGeV2,Q(2)<60GeV(2). This structure function is found to be negative at small x. The first moment Gamma(1)(d)=integral(0)(1)g(1)(d)dx evaluated at Q(0)(2)=10GeV(2) is 0.034+/-0.009(stat.)+/-0.006(syst). This value is below the Ellis-Jaffe sum rule prediction by three standard deviations. Using our earlier determination of Gamma(1)(p), we obtain Gamma(1)(p)-Gamma(1)(n)=0.199+/-0.038 which agrees with the Bjorken sum rule.
Publisher
ELSEVIER SCIENCE BV
Issue Date
1995-08
Language
English
Article Type
Article
Keywords

INELASTIC MUON SCATTERING; SUM-RULE; NUCLEON; ELECTROPRODUCTION; EXCHANGE; PROTON

Citation

PHYSICS LETTERS B, v.357, no.1-2, pp.248 - 254

ISSN
0370-2693
DOI
10.1016/0370-2693(95)00898-U
URI
http://hdl.handle.net/10203/256169
Appears in Collection
PH-Journal Papers(저널논문)
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