Lorentz violation in nucleon electromagnetic moments
Javier Monta\~no-Dom\'inguez, H\'ector Novales-S\'anchez, M\'onica, Salinas, J. Jes\'us Toscano
TL;DR
This paper calculates how Lorentz and CPT violation in the Standard Model Extension affect nucleon electromagnetic moments, using quantum contributions from quarks to set stringent experimental bounds on SME coefficients, including effects from second and third quark families.
Contribution
It provides the first detailed calculation of SME-induced quantum contributions to nucleon electromagnetic moments and derives new bounds on SME coefficients from experimental data.
Findings
Constraints on SME coefficients as restrictive as 10^{-12}
Access to SME effects from second and third quark families
Quantitative link between quark-level Lorentz violation and nucleon moments
Abstract
Yukawa couplings in the Lorentz- and -violating Standard Model Extension (SME) induce quantum contributions to the electromagnetic moments of quarks, which are calculated in the present paper and then used to define contributions to electromagnetic moments of nucleons. High-sensitivity measurements of the proton and neutron electromagnetic moments then yield constrains on SME coefficients, reaching bounds as restrictive as . This approach notably grants access to SME effects from the second and third quark families.
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