Can ${\Omega }^{-}\to {\Xi }^{-}\gamma$ be sensitive to new physics beyond the Standard Model ?

Abstract

We investigate the impact of new physics beyond the Standard Model to the $s\to d\gamma$ process, which is responsible for the short-distance contribution to the radiative decay $\text{Otogamma}$. We study three representative extensions of the Standard Model, namely a one-family technicolor model, a two Higgs doublet model and a model containing scalar leptoquarks. When constraints arising from the observed $b\to s\gamma$ transition and the upper limit on $D^0-{\bar{D}}^0$ mixing are taken into account, we find no significant contributions of new physics to the $s\to d\gamma$ process.

Comments: 9 pages, RevTex, no figures