PaperPanorama

Nuclear Theory·nucl-th

Monday·June 1, 2015

8 papers2 primary·6 cross-listed

  1. 01

    Nuclear medium effects in structure functions of nucleon at moderate

    H. Haider🇮🇳 · F. Zaidi🇮🇳 · M. Sajjad Athar🇮🇳 · S. K. Singh🇮🇳 · I. Ruiz Simo🇪🇸

    Recent experiments performed on inclusive electron scattering from nuclear targets have measured the nucleon electromagnetic structure functions , and in , , and nuclei. The measurements have been done in the energy region of and region of . We have calculated nuclear medium effects in these structure functions arising due to the Fermi motion, binding energy, nucleon correlations, mesonic contributions from pion and rho mesons and shadowing effects. The calculations are performed in a local density approximation using relativistic nucleon spectral function which include nucleon correlations. The numerical results are compared with the recent experimental data from JLab and also with some earlier experiments.

    nucl-thhep-phNPA(2015)·25 citations
  2. 02

    Probing Shadowed Nuclear Sea with Massive Gauge Bosons in the Future Heavy-Ion Collisions

    Peng Ru🇨🇳 · Ben-Wei Zhang🇨🇳 · Enke Wang🇨🇳 · Wei-Ning Zhang🇨🇳

    The production of the massive bosons and could provide an excellent tool to study cold nuclear matter effects and the modifications of nuclear parton distribution functions (nPDFs) relative to parton distribution functions (PDFs) of a free proton in high energy nuclear reactions at the LHC as well as in heavy-ion collisions (HIC) with much higher center-of mass energies available in the future colliders. In this paper we calculate the rapidity and transverse momentum distributions of the vector boson and their nuclear modification factors in p+Pb collisions at TeV and in Pb+Pb collisions at TeV in the framework of perturbative QCD by utilizing three parametrization sets of nPDFs: EPS09, DSSZ and nCTEQ. It is found that in heavy-ion collisions at such high colliding energies, both the rapidity distribution and the transverse momentum spectrum of vector bosons are considerably suppressed in wide kinematic regions with respect to p+p reactions due to large nuclear shadowing effect. We demonstrate that in the massive vector boson productions processes with sea quarks in the initial-state may give more contributions than those with valence quarks in the initial-state, therefore in future heavy-ion collisions the isospin effect is less pronounced and the charge asymmetry of W boson will be reduced significantly as compared to that at the LHC. Large difference between results with nCTEQ and results with EPS09 and DSSZ is observed in nuclear modifications of both rapidity and distributions of and in the future HIC.

    nucl-thEPJC(2015)·9 citations

Affiliations

first authorsco-authorsvia INSPIRE