Fourth generation CP violation effect on $B \to K \pi$, $\phi K$ and $\rho K$ in NLO PQCD - INSPIRE

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Fourth generation CP violation effect on $B \to K \pi$ , $\phi K$ and $\rho K$ in NLO PQCD

Nov, 2006

4 pages

Published in:

Phys.Rev.Lett. 98 (2007) 131801

e-Print:

hep-ph/0611107 [hep-ph]

DOI:

10.1103/PhysRevLett.98.131801

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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.

12.38.Bx
11.30.Er
13.25.Hw
12.60.-i
B: hadronic decay
B: branching ratio
quantum chromodynamics: perturbation theory
quark: family
family: 4
CP: violation

References(25)

Figures(0)

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