Gamow-Teller transitions and the spin EMC effect: the Bjorken sum-rule in medium

Abstract

Gamow-Teller transitions in nuclei tell us that the nucleon's axial charge $g_A^{(3)}$ is quenched in large nuclei by about 20%. This result tells us that the spin structure of the nucleon is modified in nuclei and disfavours models of the medium dependence of parton structure based only on nucleon short range correlations in nuclei. For polarized photoproduction the Gerasimov-Drell-Hearn integral is expected to be strongly enhanced in medium.

5 pages

References in corpus (6)

• Evidence for polarization of gluons in the proton
• Short Range Correlations and the EMC Effect
• Value of the axial-vector coupling strength in $\beta$ and $\beta \beta$ decays: A review
• Meson-nucleus potentials and the search for meson-nucleus bound states
• Resolution of the Proton Spin Problem
• Quark-meson coupling model with the cloudy bag

Cited by in corpus (3)

• Nucleon axial-vector coupling constant in magnetar environments
• Strongly interacting matter in extreme magnetic fields
• The Gerasimov-Drell-Hearn sum-rule with nuclear targets