Fourth Generation CP Violation Effect on B -> K pi, phi K and rho K in NLO PQCD
High Energy Physics - Phenomenology
2008-11-26 v2
Abstract
We study the effect from a sequential fourth generation quark on penguin-dominated two-body nonleptonic B meson decays in the next-to-leading order perturbative QCD formalism. With an enhancement of the color-suppressed tree amplitude and possibility of a new CP phase in the electroweak penguin, we can account better for A_{CP}(B^0 -> K^+ pi^-)-A_{CP}(B^+ -> K^+ pi^0). Taking |V_{t's}V_{t'b}| \sim 0.02 with phase just below 90^\circ, which are consistent with the b -> s l^+ l^- rate and the B_s mixing parameter \Delta m_{B_s}, we find a downward shift in the mixing-induced CP asymmetries of B^0 -> K_S pi^0 and phi K_S. The predicted behavior for B^0 -> rho^0 K_S is opposite.
Cite
@article{arxiv.hep-ph/0611107,
title = {Fourth Generation CP Violation Effect on B -> K pi, phi K and rho K in NLO PQCD},
author = {Wei-Shu Hou and Hsiang-nan Li and Satoshi Mishima and Makiko Nagashima},
journal= {arXiv preprint arXiv:hep-ph/0611107},
year = {2008}
}
Comments
4 pages, 6 figures; version to appear in Phys. Rev. Lett