CP violation in B mesons using Dalitz plot asymmetries

Abstract

We study CP violation in $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ using generalized Dalitz plot asymmetries in the angular distribution. These new kind of asymmetries are constructed by adding B and $\bar{B}$ events, and do not require flavor or time tagging, nor is the presence of strong phases needed. Using this method one requires about $2\times 10^8/\eta$ B's to measure the CP violating parameter $\eta$ in the Standard model. The two--Higgs doublet model requires only $10^7$ B's to constrain parameters better than done by the electric dipole moment of the neutron.

Comments: 12 pages, Revtex, no figures