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The energy distribution of inclusive hadrons produced by 280 GeV muons on hydrogen and deuterium targets are compared. The sum of the scaled energy distributions of the positive and negative hadrons is found to be the same for the two targets. The difference of these distributions is observed to factorise inx andz and thez-dependence is found to be independent of the target type and have a form (1−z)2.1±0.2. The net charge of the hadronic jet is positive at highx even in the case when the scattering takes place on the neutron. These results are in good agreement with the expectations of the Quark Parton Model.
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The x and Q 2 dependence of the single photon exchange cross section d 2 σ /d Q 2 d x and the proton structure functions F 2 ( x , Q 2 ) and R ( x , Q 2 ) have been measured in deep inelastic muon proton scattering in the region 0.02 < x < 0.8 and 3 < Q 2 < 190 GeV 2 . By comparing data at different incident muon energies R was found to have little kinematic dependence and an average value of −0.010 ± 0.037 (stat.) ± 0.102 (stat.). The observed deviations from scaling gave the value of Λ MS , the QCD mass scale parameter, to be 105 −45 +55 (stat.) −45 +85 (syst.) MeV. The fraction of the momentum of the nucleon carried by gluons was found to be ∼56% at Q 2 ∼22.5 GeV 2 . It is shown that to obtain a description of the data for F 2 ( x , Q 2 ) together with that measured in deep inelastic electron-proton scattering at lower Q 2 it is necessary to include additional higher twist contributions. The value of Λ MS remains unchanged with the inclusion of these contributions which were found to have an x -dependence of the form x 3 /(1 − x ).
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VALUES OF Q**2 CORRESPONDING TO THE ENTRIES IN THIS TABLE ARE 15., 20., 27., 36., 48. RESPECTIVELY.
VALUES OF Q**2 CORRESPONDING TO THE ENTRIES IN THIS TABLE ARE 11.5, 15., 20., 27., 36., RESPECTIVELY.
VALUES OF Q**2 CORRESPONDING TO THE ENTRIES IN THIS TABLE ARE 27., 36., 48., 65. RESPECTIVELY.
VALUES OF Q**2 CORRESPONDING TO THE ENTRIES IN THIS TABLE ARE 15., 20., 27., 36., 48.,65., 90. RESPECTIVELY.
VALUES OF Q**2 CORRESPONDING TO THE ENTRIES IN THIS TABLE ARE 11.5, 15., 20., 27., 36., 48.,65.RESPECTIVELY.
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COMBINED VALUES OF DATA AT 120.,200.,250.,280. GEV/C.
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