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A gluonic mechanism for B --> D eta'

J. O. Eeg·A. Hiorth·A. D. Polosa
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Abstract

We present a calculation of the process B --> D eta' within a heavy-light chiral quark model. We assume that the eta' has a large gluonic component, and its coupling is described via the glue-glue-eta' effective vertex. The main contribution comes from the non-factorizable part of the effective weak Lagrangian at quark level. We find, within our model-dependent assumptions, a branching ratio Br(B --> D eta') = (1.7 -- 3.3) 10^(-4), somewhat below the experimental upper bound 9.4 10^(-4).

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J. O. Eeg, A. Hiorth, A. D. Polosa. 2001-09-21. A gluonic mechanism for B --> D eta'. https://doi.org/10.1103/physrevd.65.054030

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