Hunting for Direct CP Violation in B over bar s0&x27f6;π+π-K*0

摘要

In perturbative QCD approach, based on the first order of isospin symmetry breaking, we study the direct CP violation in the decay of B over bar s0?rho omega K*0?pi+pi-K*0. An interesting mechanism is applied to enlarge the CP violating asymmetry involving the charge symmetry breaking between rho and omega. We find that the CP violation is large by the rho-omega mixing mechanism when the invariant masses of the pi+pi- pairs are in the vicinity of the omega resonance. For the decay process of B over bar s0?rho omega K*0?pi+pi-K*0, the maximum CP violation can reach -59.12%. Furthermore, taking rho-omega mixing into account, we calculate the branching ratio for B over bar s0?rho omega K*0. We also discuss the possibility of observing the predicted CP violation asymmetry at the LHC.

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