New bound on penguin pollution in B0(t) --> pi+ pi-
Abstract
In the presence of penguin contributions, the indirect CP asymmetry in B0(t) --> pi+ pi- measures sin 2alphaeff, where alphaeff deviates from the true value of the CKM phase alpha by an amount theta, i.e. alphaeff = alpha + theta. Using the measured value of direct CP asymmetry in B0(t) --> pi+ pi-, we derive new bound on |2 theta|.
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