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Implications of the first observation of $B\to K_1γ$

Y. J. Kwon·Jong-Phil Lee
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Abstract

Implications of the recent new measurements of $B\to K_1γ$ by Belle are examined. It is shown that the new branching ratio $\calB(B\to K_1(1270)γ)$ requires very large form factor compared to the theoretically predicted one. This is an opposite case to $B\to K^*γ$ where theory expected larger branching ratio. Possible origins of the discrepancy are discussed.

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Y. J. Kwon, Jong-Phil Lee. 2004-09-11. Implications of the first observation of $B\to K_1γ$. https://doi.org/10.1103/physrevd.71.014009

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