Accurate measurement of F-2(d)/F-2(p) and R(d)-R(p)

Arneodo M, Arvidson A, Badelek B, et al. Accurate measurement of F-2(d)/F-2(p) and R(d)-R(p). Nucl.Phys. B. 1997;487(1-2):3-26.Results are presented for F-2(d)/F-2(p) and R(d) - R(p) from simultaneous measurements of deep inelastic muon scattering on hydrogen and deuterium targets, at 90, 120, 200 and 280 GeV. The difference R(d) - R(p), determined in the range 0.002 0.1 the ratio decreases with Q(2)

The A dependence of the nuclear structure function ratios

Arneodo M, Arvidson A, Badelek B, et al. The A dependence of the nuclear structure function ratios. Nucl.Phys. B. 1996;481(1-2):3-22.Results are presented for six nuclei from Be to Pb on the structure function ratios F-2(A)/F-2(C)(X) and their A dependence in deep inelastic muon scattering at 200 GeV incident: muon energy. The data cover the kinematic range 0.01 < x < 0.8 with Q(2) ranging from 2 to 70 GeV2. The A dependence of nuclear structure function ratios is parametrised and compared to various models

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

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

Spin structure of the proton from polarized inclusive deep-inelastic muon-proton scattering

We have measured the spin-dependent structure function g1p in inclusive deep-inelastic scattering of polarized muons off polarized protons, in the kinematic range 0.003<x<0.7 and 1GeV2<Q2<60GeV2. A next-to-leading order QCD analysis is used to evolve the measured g1p(x,Q2) to a fixed Q02. The first moment of g1p at Q02=10GeV2 is \u3931p=0.136\ub10.013 (stat) \ub10.009 (syst) \ub10.005 (evol). This result is below the prediction of the Ellis-Jaffe sum rule by more than two standard deviations. The singlet axial charge a0 is found to be 0.28\ub10.16. In the Adler-Bardeen factorization scheme, \u394g 432 is required to bring \u394\u3a3 in agreement with the quark-parton model. A combined analysis of all available proton, deuteron, and 3He data confirms the Bjorken sum rule