The Decay $B\to K^*γ$ from QCD Sum Rules

Details The Decay $B\to K^*γ$ from QCD Sum Rules The Decay $B\to K^*γ$ from QCD Sum Rules

1993-08-07

arxiv.org/abs/hep-ph/9308244v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 ps, 2 uuencoded PS figures included, requires epsf.sty and revtex3, TUM-T31-43/93

Scientific paper

Using the QCD sum rules approach and the complete leading--logarithmic short--distance coefficients determining the penguin--amplitude, we obtain $B(B\to K^*\gamma) = (6.8\pm 2.4)\cdot 10^{-5}$ for top--quark masses in the range (150--200) GeV and $|V_{cb}| = 0.035$ for $\tau_B = 1.5\,\text{ps}$. The ratio to the inclusive rate is $B(B\to K^*\gamma)/B(B\to X_s\gamma) = (20\pm 6)\% $.

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