Nuclear medium effects in $F_{2A}^{EM}(x,Q^2)$ and $F_{2A}^{Weak}(x,Q^2)$ structure functions

Abstract

Recent phenomenological analysis of experimental data on DIS processes induced by charged leptons and neutrinos/antineutrinos beams on nuclear targets by CTEQ collaboration has confirmed the observation of CCFR and NuTeV collaborations, that weak structure function $F_{2A}^{Weak}(x,Q^2)$ is different from electromagnetic structure function $F_{2A}^{EM}(x,Q^2)$ in a nucleus like iron, specially in the region of low $x$ and $Q^2$. In view of this observation we have made a study of nuclear medium effects on $F_{2A}^{Weak}(x,Q^2)$ and $F_{2A}^{EM}(x,Q^2)$ for a wide range of $x$ and $Q^2$ using a microscopic nuclear model. We have considered Fermi motion, binding energy, nucleon correlations, mesonic contributions from pion and rho mesons and shadowing effects to incorporate nuclear medium effects. The calculations are performed in a local density approximation using a relativistic nucleon spectral function which includes nucleon correlations. The numerical results in the case of iron nucleus are compared with the experimental data.

17 pages, 9 figures

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• The EMC Effect and High Momentum Nucleons in Nuclei
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• Study of spin-dependent structure functions of ${}^3\mathrm{He}$ and ${}^3\mathrm{H}$ at NNLO approximation and corresponding nuclear corrections
• Weak structure functions in ${\nu }_l-N$ and ${\nu }_l-A$ scattering with nonperturbative and higher order perturbative QCD effects
• Nucleon and nuclear structure functions with non-perturbative and higher order perturbative QCD effects
• Theoretical tools for neutrino scattering: interplay between lattice QCD, EFTs, nuclear physics, phenomenology, and neutrino event generators
• Phenomenology of leading nucleon production in $ep$ collisions at HERA in the framework of fracture functions
• Determination of neutron fracture functions from a global QCD analysis of leading neutron production at HERA
• Nuclear medium effects in Drell-Yan process
• Parton distribution functions with QED corrections in the valon model
• Nuclear medium effects in lepton-nucleus DIS in the region of $x\gtrsim 1$
• Deep inelastic (anti)neutrino-nucleus scattering