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On the Dalitz plot analysis of the B --> K eta gamma decays

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arxiv 0806.2247 v3 pith:ADGDYJIQ submitted 2008-06-13 hep-ph

On the Dalitz plot analysis of the B --> K eta gamma decays

classification hep-ph
keywords gammadalitzdecaysplotagreementamplitudeanalysisb-factories
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Recently B-factories have published new results on the $B \to K \eta \gamma$ decays being inspired by the theoretical suggestion to search for new physics in $B \to P_1 P_2 \gamma$ decays. Using heavy meson chiral perturbation theory we find mechanism which governs the amplitude in parts of the Dalitz plot where either $K$ or $\eta$ mesons are soft. The dominant contributions in these cases are coming from the nonresonant decay modes. We discuss also $B \to K \eta' \gamma$ Dalitz plot. Our partially integrated rates are in agreement with the experimental findings.

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