Measuring alpha using B -> K(*) Kbar(*) Decays

Alakabha Datta; David London

Measuring alpha using B -> K() Kbar() Decays

High Energy Physics - Phenomenology 2007-05-23 v1

Authors: Alakabha Datta , David London

Abstract

We describe a new method for obtaining the CP phase alpha via measurements of B_{d,s} -> K(*) Kbar(*) decays. This method is particularly appropriate for hadron colliders since some of the branching ratios are small [O(10^{-6})], and since B_s decays are involved. By comparing the value of alpha extracted from this method with that obtained in B -> pi pi or B -> rho pi decays, one can detect the presence of new physics in the b -> d penguin amplitude. The method does require theoretical input, but model calculations suggest that the theoretical uncertainty is at most 5%, and might well be even smaller. These estimates can be tested experimentally. The method is therefore quite clean.

Keywords

b meson penguin decays cp violation in decays dalitz plot analysis

Cite

@article{arxiv.hep-ph/0205282,
  title  = {Measuring alpha using B -> K(*) Kbar(*) Decays},
  author = {Alakabha Datta and David London},
  journal= {arXiv preprint arXiv:hep-ph/0205282},
  year   = {2007}
}

Comments

6 pages, LaTeX, no figures. Talk given by David London at Flavor Physics and CP Violation (FPCP), Philadelphia, PA, USA, May 2002