Effect of bound nucleon internal structure change on nuclear structure functions

Abstract

Effect of bound nucleon internal structure change on nuclear structure functions is investigated based on local quark-hadron duality. The bound nucleon structure functions calculated for charged-lepton and (anti)neutrino scattering are all enhanced in symmetric nuclear matter at large Bjorken-$x$ ($x \agt 0.85$) relative to those in a free nucleon. This implies that a part of the enhancement observed in the nuclear structure function $F_2$ (in the resonance region) at large Bjorken-$x$ (the EMC effect) is due to the effect of the bound nucleon internal structure change. However, the $x$ dependence for the charged-lepton and (anti)neutrino scattering is different. The former [latter] is enhanced [quenched] in the region $0.8 \alt x \alt 0.9$ [$0.7 \alt x \alt 0.85$] due to the difference of the contribution from axial vector form factor. Because of these differences charge symmetry breaking in parton distributions will be enhanced in nuclei.

12 pages, 4 figures, to be published in PLB. Effect of Fermimotion is included. Accordingly, 4 figures as well as the text were modified

References in corpus (11)

• Polarization Transfer in the ^4He(\vec e,e'\vec p)^3H Reaction up to Q^2 = 2.6 (GeV/c)^2
• Quark structure and nuclear effective forces
• Symmetry breaking and quark-hadron duality in structure functions
• ${\Lambda }_c^{+}$, ${\Sigma }_c$, ${\Xi }_c$ and ${\Lambda }_b$ hypernuclei in the quark-meson coupling model
• Properties of charmed and bottom hadrons in nuclear medium: Results for ${\Lambda }_c^{+}$ and ${\Lambda }_b$ hypernuclei
• Parton-Hadron Duality in Unpolarised and Polarised Structure Functions
• Effect of the bound nucleon form factors on charged-current neutrino-nucleus scattering
• Modeling quark-hadron duality for relativistic, confined fermions
• Local Duality and Charge Symmetry Violation in Quark Distributions
• Medium Modification of the Proton Form Factor
• Scalar and vector form factors of the in-medium nucleon

Cited by in corpus (3)

• Nucleon and hadron structure changes in the nuclear medium and impact on observables
• Impact of medium modification of the nucleon weak and electromagnetic form factors on the neutrino mean free path in dense matter
• Scaling of Dirac Fermions and the WKB approximation