New bound on penguin pollution in B^0(t) --> pi^+ pi^-

Details New bound on penguin pollution in B^0(t) --> pi^+ pi^- New bound on penguin pollution in B^0(t) --> pi^+ pi^-

2002-07-20

arxiv.org/abs/hep-ph/0207249v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, LaTex, 1 figure, Minor changes in the text

Scientific paper

In the presence of penguin contributions, the indirect CP asymmetry in B^0(t)
--> pi^+ pi^- measures sin 2alpha_{eff}, where alpha_{eff} deviates from the
true value of the CKM phase alpha by an amount theta, i.e. alpha_{eff} = alpha
+ theta. Using the measured value of direct CP asymmetry in B^0(t) --> pi^+
pi^-, we derive new bound on |2 theta|.

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