Polarization transfer in ${}^4$He$(\vec{e},e^{\prime }\vec{p})$${}^3$H: is the ratio $G_{Ep}/G_{Mp}$ modified in medium ?

Abstract

Polarization observables in the ${}^4$He$(\vec{e},e^{\prime }\vec{p})$${}^3$H reaction are calculated using accurate three- and four-nucleon bound-state wave functions, a realistic model for the nuclear electromagnetic current operator, and a treatment of final-state-interactions with an optical potential. In contrast to earlier studies, no significant discrepancies are found between theory and experiment both for the ratio of transverse to longitudinal polarization transfers and for the induced polarization, when free-nucleon electromagnetic form factors are used in the current operator. The present results challenge the current interpretation of the experimental data in terms of medium-modified form factors.

arXiv comment4 pages and 2 figues

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Cited by in corpus (27)

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• Inclusive quasi-elastic electron-nucleus scattering
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• Electromagnetic response of 12C: a first-principles calculation
• Quark-Meson-Coupling (QMC) model for finite nuclei, nuclear matter and beyond
• Octet baryon electromagnetic form factors in nuclear medium
• Transition between nuclear and quark-gluon descriptions of hadrons and light nuclei
• Nucleon Form Factors - A Jefferson Lab Perspective
• Electron Scattering From High-Momentum Neutrons in Deuterium
• A precise extraction of the induced polarization in the 4He(e,e'p)3H reaction
• Dependence of two-nucleon momentum densities on total pair momentum
• Neutron Properties in the Medium
• Two-Body Electrodisintegration of ${}^3$He at High Momentum Transfer
• Medium Modifications of Hadron Properties and Partonic Processes
• Medium modifications of the bound nucleon GPDs and incoherent DVCS on nuclear targets
• Impact of medium modification of the nucleon weak and electromagnetic form factors on the neutrino mean free path in dense matter
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• Short-range correlations and their implications for isospin-dependent modification of nuclear quark distributions
• Nuclear Density Dependence of In-Medium Polarization
• Nucleon sigma term and quark condensate in nuclear matter
• Medium modifications of the bound nucleon GPDs and the quark contribution to the spin sum rule
• Measurement of polarization transfer in the quasi-elastic ${}^{40}\mathrm{Ca}(\vec{e},e^{\prime }\vec{p})$ process
• The ${}^3$He$(e,e^{\prime }p{)}^2$H and ${}^4$He$(e,e^{\prime }p{)}^3$H reactions at high momentum transfer
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• Recent Experimental Results from JLab
• Conserved electromagnetic currents in a relativistic optical model