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Sensitivity of Parity-Violating Electron Scattering to a Dark Photon
A W Thomas1, X G Wang1, A G Williams1
1ARC Centre of Excellence for Dark Matter Particle Physics and CSSM, Department of Physics, University of Adelaide, South Australia 5005, Australia.
Physical Review Letters
|July 16, 2022
Summary
Parity-violating electron scattering (PVES) can detect dark photons, a potential source of new physics. This research explores how PVES sensitivity to dark photons impacts nuclear structure and parton distributions.
Area of Science:
- * Particle Physics and Nuclear Physics
Background:
- * Parity-violating electron scattering (PVES) probes the weak neutral current.
- * A hypothetical dark photon could interact with Standard Model particles, including electrons.
- * Current experimental capabilities are advancing, opening new avenues for discovery.
Purpose of the Study:
- * To investigate the sensitivity of PVES asymmetries to dark photon properties.
- * To explore the potential for PVES to discover new physics via dark photon interactions.
- * To assess the impact of a dark photon on nuclear structure and parton distribution functions.
Main Methods:
- * Theoretical analysis of PVES in elastic and deep-inelastic scattering regimes.
- * Calculation of scattering asymmetries as a function of dark photon parameters.
- * Examination of implications for atomic nuclei, neutron stars, and parton distribution functions.
Main Results:
- * PVES exhibits sensitivity to the parameter space of a dark photon.
- * Specific regions of parameter space offer potential for dark photon discovery through PVES.
- * The presence of a dark photon could modify predictions for nuclear and parton physics.
Conclusions:
- * PVES is a promising probe for dark photon searches and new physics.
- * Dark photons could necessitate revisions to models of nuclear and parton structure.
- * Future experimental advancements in PVES will enhance discovery potential.
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