Eur. Phys. J. C 19, 471-476
DOI: 10.1007/s100520100624

Possibility of T-violating P-conserving magnetism and its contribution to the T-odd P-even neutron-nucleus forward elastic scattering amplitude

S.L. Cherkas

Institute of Nuclear Problems, 220050 Minsk, Belarus

(Received: 29 August 2000 / Revised version: 22 January 2001 / Published online: 23 March 2001 -© Springer-Verlag 2001)

Abstract
T-violating P-even magnetism is considered. The magnetism arises from the T-violating P-conserving vertex of a spin 1/2 particle interaction with the electromagnetic field. The vertex vanishes for a particle on the mass shell. Considering the particle interaction with a point electric charge we have obtained the T-violating P-even spin dependent potential, which is inversely proportional to the cubed distance from the charge. The matrix element of this potential is zero for particle states on the mass shell; nevertheless, the potential contributes to the T-odd P-even neutron forward elastic scattering amplitude by a deformed nucleus with spin S> 1/2. The contribution arises if we take into account incident neutron plane wave distortion by the strong neutron interaction with the nucleus.

© Società Italiana di Fisica, Springer-Verlag 2001