B -> K(*) Kbar(*) Decays: A New Method for Measuring the CP Phase \alpha
Abstract
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.
Cite
@article{arxiv.hep-ph/0105073,
title = {B -> K(*) Kbar(*) Decays: A New Method for Measuring the CP Phase \alpha},
author = {Alakabha Datta and David London},
journal= {arXiv preprint arXiv:hep-ph/0105073},
year = {2017}
}
Comments
8 pages, LaTeX, no figures. The first version of the paper had an error in it: we had assumed that corrections to the LEET limit go like 1/EK, and are thus small. In fact, they go like 1/log(EK), and can be sizeable. The present version of the paper corrects this error, with the result that the conclusions are somewhat weaker. The proposed method for obtaining alpha, however, is still valid