A CP sensitive asymmetry in the three--body decay stop_1 -> b tau+ tau-sneutrino

Details A CP sensitive asymmetry in the three--body decay stop_1 -> b tau+ tau-sneutrino A CP sensitive asymmetry in the three--body decay stop_1 -> b tau+ tau-sneutrino

2002-02-21

arxiv.org/abs/hep-ph/0202198v2

Phys.Lett.B538:59-65,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTex, 9 pages, 3 figures, v2, improved treatment of transversal polarized taus, modified table, conclusions unchanged

Scientific paper

10.1016/S0370-2693(02)01953-6

We consider the three--body decay stop_1 -> b tau+ tau-sneutrino and propose the asymmetry of the tau polarization perpendicular to the decay plane as a CP sensitive observable. We calculate this asymmetry in the Minimal Supersymmetric Standard Model taking the parameters mu and A_t complex. In the parameter domain where the decay stop_1 -> b tau+ tau-sneutrino is important this asymmetry can go up to 30%. We also estimate the event rates necessary to observe this asymmetry at 90% CL.

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