B -> K(*) Kbar(*) Decays: A New Method for Measuring the CP Phase α

Details B -> K(*) Kbar(*) Decays: A New Method for Measuring the CP Phase α B -> K(*) Kbar(*) Decays: A New Method for Measuring the CP Phase α

2001-05-08

arxiv.org/abs/hep-ph/0105073v2

Phys.Lett. B533 (2002) 65-74

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, LaTeX, no figures. The first version of the paper had an error in it: we had assumed that corrections to the LEET lim

Scientific paper

We present a new method for measuring the CP phase \alpha. It requires the measurement of the pure penguin decays Bd(t) -> K(*) Kbar(*) and B_s -> K(*) Kbar(*). The method is quite clean: we estimate the theoretical uncertainty to be at most 5%. By applying the method to several K(*) Kbar(*) final states, \alpha can be extracted with a fourfold ambiguity. An additional assumption reduces this ambiguity to twofold: {\alpha, \alpha + \pi}. Since no \pi0 detection is needed, this method can be used at hadron colliders.

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