Shedding new light on weak annihilation B-meson decays

We identify a novel leading-power contribution to the pure weak annihilation non-leptonic B-meson decay amplitudes, which arises from the hard-collinear gluon exchange between the light quark of the bottom meson and the final-state active partons. This interesting observation is naturally expected t...

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Published inNuclear physics. B Vol. 990; p. 116175
Main Authors Lü, Cai-Dian, Shen, Yue-Long, Wang, Chao, Wang, Yu-Ming
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.05.2023
Elsevier
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Summary:We identify a novel leading-power contribution to the pure weak annihilation non-leptonic B-meson decay amplitudes, which arises from the hard-collinear gluon exchange between the light quark of the bottom meson and the final-state active partons. This interesting observation is naturally expected to shed new light on deciphering rapidity divergences in the convolution integrals of the soft-collinear factorization formulae. Subsequently we explore an intriguing enhancement mechanism due to the penguin contractions of the current-current operators from the weak effective Hamiltonian, which yields the significant impacts on the CP violating observables.
ISSN:0550-3213
DOI:10.1016/j.nuclphysb.2023.116175