Speaker
Description
We propose a novel kind of CP violation effect --- the double-mixing CP asymmetry --- in a type of cascade decays that involves at least two mixing neutral mesons in the decay chain. It is induced by the interference between different oscillation paths of the neutral mesons in the decay process. The double-mixing CP asymmetry has unique phenomenological value because it still exists in the absence of strong phases and thus provides opportunities for clean determination of CKM phase angles and searches for new physics. The numerical analysis is performed for the example channel $B^0_s \to \rho^0 \bar{K}^0 \to \rho^0 (\pi^-\ell^+{\nu}_\ell)$ to show that the double-mixing CP asymmetry can be very significant and practically measurable by experiments.
