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arxiv: hep-ph/0409133 · v1 · submitted 2004-09-11 · ✦ hep-ph

Implications of the first observation of Bto K₁γ

classification ✦ hep-ph
keywords gammabranchingimplicationsratiobellecalbcasecompared
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Implications of the recent new measurements of $B\to K_1\gamma$ by Belle are examined. It is shown that the new branching ratio $\calB(B\to K_1(1270)\gamma)$ requires very large form factor compared to the theoretically predicted one. This is an opposite case to $B\to K^*\gamma$ where theory expected larger branching ratio. Possible origins of the discrepancy are discussed.

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