EPJ

2024 Impact factor 4.8
EPJ C - Particles and Fields
Particles and Fields
Eur. Phys. J. C 4, 277-281
DOI 10.1007/s100529800775

Perturbative QCD study on the photonic penguin contributions to the decay ${B\rightarrow K^* \gamma}$

Fu-Guang Cao1,2,3 - Tao Huang1,2

1 CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, P. R. China
2 Institute of High Energy Physics, Academia Sinica, P.O. Box 918, Beijing 100039, P. R.  China (e-mail: caofg@itp.ac.cn)
3 Institute of Theoretical Physics, Academia Sinica, P.O. Box 2735, Beijing 100080, P. R. China

Received: 8 July 1997 / Published online: 23 February 1998

Abstract
Including corrections of order O(mK*/mB), we present an analysis of photonic penguin contributions to the decay ${B\rightarrow K^* \gamma}$ in the perturbative QCD framework. Employing several models of the meson wave functions, we demonstrate that the corrections of O(mK*/mB) are enhanced and will provide substantial contributions to the decay because of the B meson wave function being sharply peaked (bound state effect). The numerical predictions for the corrections are about $30\%\sim 60\%$which depend on the non-perturbative inputs such as the meson wave functions and the b-quark mass.

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