QCD analysis of non-singlet structure functions at NNLO accuracy, based on the Laplace transform
Physics Department, Yazd University, P.O.Box 89195-741, Yazd, Iran
2 School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM), P.O.Box 19395-5531, Tehran, Iran
Accepted: 25 May 2020
Published online: 6 June 2020
In this work, using the Laplace transformation technique we present our results for non-singlet quark distributions as well as nucleon structure function in unpolarized case at next-to-next-to-leading order QCD accuracy. We shall particularly compare our results for the sets of valence-quark parton distribution functions with the contemporary collaborations like CT14, CT18, MMHT14, MKAM16 and NNPDF. To construct the nucleon structure function, we employ the expansion of Jacobi polynomials which is a suitable transform to convert the results of non-singlet structure function from the Laplace s-space to Bjorken x-space. We shall also consider the contributions of target mass correction as well as the higher twist effects at large-x region for the proton and deuteron structure functions. Our results for the unpolarized quark distribution functions and nucleon structure functions are in good agreement with recent theoretical models and available experimental data.
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