3,450 research outputs found

    The QCD Analysis of the Structure Functions and Effective Nucleon Mass

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    On the basis of the target mass corrections to structure functions of deep-inelastic scattering of leptons, we evaluate effective nucleon mass that turns out to be twice Mnucl.M_{nucl.} for deep-inelastic scattering on the nucleus target and equals Mnucl.M_{nucl.} for the hydrogen target.Comment: LATEX, 6 pages, no figure

    Constraints on "Second Order Fixed Point" QCD from the CCFR Data on Deep Inelastic Neutrino-Nucleon Scattering

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    The results of LO {\it Fixed point} QCD (FP-QCD) analysis of the CCFR data for the nucleon structure function  xF3(x,Q2) ~xF_3(x,Q^2)~ are presented. The predictions of FP-QCD, in which the Callan-Symanzik  β ~\beta~ function admits a {\it second order} ultraviolet zero at  α=α0 ~\alpha = \alpha_0~ are in good agreement with the data. Constraints for the possible values of the  β ~\beta~ function parameter  b ~b~ regulating how fast  αs(Q2) ~\alpha_ s(Q^2)~ tends to its asymptotic value  α0≠0 ~\alpha_{0}\ne 0~ are found from the data. The corresponding values of  α0 ~\alpha_{0}~ are also determined. Having in mind our recent " First order fixed point" QCD fit to the same data we conclude that in spite of the high precision and the large  (x,Q2) ~(x,Q^2)~ kinematic range of the CCFR data they cannot discriminate between QCD and FP-QCD predictions for  xF3(x,Q2) ~xF_3(x,Q^2)~.Comment: 8 pages, LaTe
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