Large CP Violation in $B\to K^{(\ast )}X$ Decays

Abstract

We consider the possibility of observing CP violation in quasi-inclusive decays of the type $B^{-}\to K^{-}X$, $B^{-}\to K^{\ast -}X$, ${\bar{B}}^0\to K^{-}X$ and ${\bar{B}}^0\to K^{\ast -}X$, where $X$ does not contain strange quarks. We present estimates of rates and asymmetries for these decays in the Standard Model and comment on the experimental feasibility of observing CP violation in these decays at future $B$ factories. We find the rate asymmetries can be quite sizeable.

Comments: 9 pages, latex, 4 figures. Talk given at 20th Annual MRST (Montreal-Rochester-Syracuse-Toronto) Meeting on High-Energy Physics: MRST 98: Toward the Theory of Everything, Montreal, Canada, 13-15 May 1998