The European Physical Journal C

ISSN: 1434-6044 (printed version)
ISSN: 1434-6052 (electronic version)

Table of Contents

Abstract Volume 4 Issue 2 (1998) pp 277-281
DOI 10.1007/s100529800775

theoretical physics:
Perturbative QCD study on the photonic penguin contributions to the decay $B\rightarrow K^* \gamma$

Fu-Guang Cao (1)(2)(3), Tao Huang (1)(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 $O(m_{K^*}/m_B)$, 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 $O(m_{K^*}/m_B)$ 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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Online publication: June 23, 1998
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