Enhanced effects on extracting \gamma from untagged B^0 and B_s decays
High Energy Physics - Phenomenology
2008-11-26 v2
Abstract
The weak phase \gamma can be determined using untagged B^0\to DK_S or B_s\to D\phi, D\eta^{(')} decays. In the past, the small lifetime difference y\equiv \Delta\Gamma/(2\Gamma) has been neglected in B^0, while the CP violating parameter \epsilon\equiv 1-|q/p|^2 has been neglected in both B^0-\bar B^0 and B_s-\bar B_s mixing. We estimate the effect of neglecting y and \epsilon. We find that in D decays to flavor states this introduces a systematic error, which is enhanced by a large ratio of Cabibbo-allowed to doubly Cabibbo-suppressed D decay amplitudes.
Keywords
Cite
@article{arxiv.hep-ph/0702011,
title = {Enhanced effects on extracting \gamma from untagged B^0 and B_s decays},
author = {Michael Gronau and Yuval Grossman and Ze'ev Surujon and Jure Zupan},
journal= {arXiv preprint arXiv:hep-ph/0702011},
year = {2008}
}
Comments
one reference added, to be submitted for publication in Physics Letters B