Soft gluon contributions to the B --> K eta' amplitude in a low energy bosonization model

Details Soft gluon contributions to the B --> K eta' amplitude in a low energy bosonization model Soft gluon contributions to the B --> K eta' amplitude in a low energy bosonization model

2005-06-15

arxiv.org/abs/hep-ph/0506152v3

J.Phys. G32 (2006) 2081-2088

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 2 PS figures, LaTeX; references added and commented

Scientific paper

Intriguing B --> K eta' decays provide a unique opportunity to study a joining of two-gluon configurations arising from the penguin b --> sG and b --> sGG transitions, with those inherent to the eta' particle. We employ the heavy-light chiral quark model, applied previously to a somewhat related B --> D eta' decay, as a calculational tool accounting for the nonperturbative soft gluon contributions to the amplitude at hand. Thereby we arrive at a novel contribution to the singlet penguin amplitude, which within our model accounts for ~ 10 % of the measured B --> K eta' amplitude.

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