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Paper   IPM / Particles / 12692
School of Particles and Accelerator
  Title:   Nuclear parton densities and their uncertainties at the next-to-leading order
  Author(s):  Shahin Atashbar Tehrani
  Status:   Published
  Journal: Phys. Rev. C
  No.:  86
  Vol.:  064301
  Year:  2012
  Supported by:  IPM
  Abstract:
Considering the nuclear reactions which involve specific features at certain regions of the x-Bjorken variable whichwas first observed by theEMCgroup, we indicate that the parton distributions in nuclei are not simply as the parton densities in nucleons. In addition to the most commonly analyzed data sets for deep-inelastic scattering of charged leptons off nuclei, we also analyze the Drell-Yan dilepton production.We investigate parametrizations of nuclear parton distributions at the next-to-leading order (NLO) of αs . Finally, optimum nuclear structure functions are determined by a χ2 analysis of experimental data for the nuclear structure function FA 2 /F A 2 and Drell-Yan cross-section ratios. The related uncertainties are estimated by the Hessian method. Our results are in good agreement with the available experimental data and better than the results of some other fitting parametrization methods

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