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.

arXiv comment5 pages

References in corpus (26)

• Constituent Quarks and g_1
• The Spin Structure of the Nucleon
• Nucleon-Nucleon Correlations, Short-lived Excitations, and the Quarks Within
• Evidence for polarization of gluons in the proton
• Nucleon and hadron structure changes in the nuclear medium and impact on observables
• Short Range Correlations and the EMC Effect
• Value of the axial-vector coupling strength in $\beta$ and $\beta \beta$ decays: A review
• The Spin Structure of the Proton
• The Spin-dependent Structure Function of the Proton g_1^p and a Test of the Bjorken Sum Rule
• Variations of Hadron Masses and Matter Properties in Dense Nuclear Matter
• Meson-nucleus potentials and the search for meson-nucleus bound states
• EMC and Polarized EMC Effects in Nuclei
• Spin-dependent structure functions in nuclear matter and the polarized EMC effect
• Etaprime and Eta Mesons with Connection to Anomalous Glue
• Resolution of the Proton Spin Problem
• The nucleon's octet axial-charge g_A^8 with chiral corrections
• Nuclear modification of scalar, axial and tensor charges from lattice QCD
• The Gerasimov-Drell-Hearn Sum Rule
• Quark-meson coupling model with the cloudy bag
• Polarized quark distributions in nuclear matter
• Chiral Symmetry Restoration and Parity Mixing
• Nuclear effects in $g_{1A}(x,Q^2)$ at small $x$ in deep inelastic scattering on ${}^7$Li and ${}^3$He
• Polarized EMC Effect in the QMC Model
• Updating spin-dependent Regge intercepts
• Reflections on the Origin of the EMC Effect
• Nuclear effects on the spin-dependent structure functions

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