Regular Article - Theoretical Physics
Annihilation contributions in B→K1γ decay in next-to-leading order in LEET and CP-asymmetry
National Centre for Physics and Department of Physics, Quaid-i-Azam University, Islamabad, Pakistan
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Revised: 22 May 2006
Published online: 2 December 2006
The effect of weak annihilation and u-quark penguin contribution on the branching ratio B→K1γ at next-to-leading order of αs are calculated using the LEET approach. It is shown that the value of the LEET form factor remains the same in the range of the unitarity triangle phase α favored by the standard model. The CP-asymmetry for the above mentioned decay has been calculated, and its suppression due to the hard-spectator correction has also been incorporated. In addition, the sensitivity of the CP-asymmetry on the underlying parameters has been discussed.
© Springer-Verlag Berlin Heidelberg, 2007