Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-02-26
Eur.Phys.J. C29 (2003) 573-585
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages, 14 figures; Improved scanning of parameter space leads to some numerical change, but the basic conclusion remains un
Scientific paper
10.1140/epjc/s2003-01247-8
We investigate the violation of time reversal invariance in the decay of the free neutron in the framework of the Minimal Supersymmetric Standard Model (MSSM). The coefficient of the triple product of the neutron spin and the momenta of electron and neutrino, the so called D parameter, is computed at one loop order including all diagrams. We find that D is mainly sensitive to the trilinear A coupling in the squark sector and to the phase of the coefficient \mu which mixes the two Higgs superfields. The maximal MSSM contribution using parameters still allowed by experiment is however at D \approx 10^{-7}, while QED final state interactions give a value of D_{fsi} = - 2.3 * 10^{-5}. Explicit expressions for all relevant diagrams are given in an Appendix.
Drees Manuel
Rauch Michael
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