Fourth Generation CP Violation Effects on B{yields}K{pi}, {phi}K, and {rho}K in Next-to-Leading-Order Perturbative QCD
- Department of Physics, National Taiwan University, Taipei, Taiwan 106 (China)
- Institute of Physics, Academia Sinica, Taipei, Taiwan 115 (China)
- School of Natural Sciences, Institute for Advanced Study, Princeton, New Jersey 08540 (United States)
- Physique des Particules, Universite de Montreal, Montreal, Quebec, H3C 3J7 (Canada)
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 amplitude, we can account better for A{sub CP}(B{sup 0}{yields}K{sup +}{pi}{sup -})-A{sub CP}(B{sup +}{yields}K{sup +}{pi}{sup 0}). Taking |V{sub t{sup '}}{sub s}V{sub t{sup '}}{sub b}|{approx}0.02 with a phase just below 90 deg., which is consistent with the b{yields}sl{sup +}l{sup -} rate and the B{sub s} mixing parameter {delta}m{sub B{sub s}}, we find a downward shift in the mixing-induced CP asymmetries of B{sup 0}{yields}K{sub S}{pi}{sup 0} and {phi}K{sub S}. The predicted behavior for B{sup 0}{yields}{rho}{sup 0}K{sub S} is opposite.
- OSTI ID:
- 20951178
- Journal Information:
- Physical Review Letters, Vol. 98, Issue 13; Other Information: DOI: 10.1103/PhysRevLett.98.131801; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
Similar Records
Enhanced K{sub L}{yields}{pi}{sup 0}{nu}{nu} from direct CP violation in B{yields}K{pi} with four generations
Benchmarks for the new-physics search through CP violation in B{sup 0}{yields}{pi}{sup 0}K{sub S}