CP-violation in Compton scattering

Details CP-violation in Compton scattering CP-violation in Compton scattering

2008-03-03

arxiv.org/abs/0803.0343v1

Phys.Rev.C77:065501,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 5 figures, revtex

Scientific paper

10.1103/PhysRevC.77.065501

I consider Compton scattering off the nucleon in the presence of $CP$ violation. I construct the Compton tensor which possesses these features and consider low energy expansion (LEX) of the corresponding amplitudes. It allows to separate out the Born contribution which only depends on the static properties of the nucleon, such as the electric charge, the mass, the magnetic moment, and the electric dipole moment (EDM). I introduce new structure constants, the $T$-odd nucleon polarizabilities which parametrize the unknown non-Born part. These constants describe the response of the $T$-violating content of the nucleon to the external quasistatic electromagnetic field. As an estimate, I provide a HBChPT calculation for these new polarizabilities and discuss the implications for the experiment.

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