Probing electroweak physics using B -> XM decays in the endpoint region

Abstract

Using soft-collinear effective theory we describe at leading order in 1/m_b all the semi-inclusive hadronic B -> XM decays near the endpoint, where an energetic light meson M recoils against an inclusive jet X. We also include the decays involving eta, eta' mesons that receive additional contributions from gluonic operators. The predicted branching ratios and CP asymmetries depend on fewer hadronic parameters than the corresponding two-body B decays. This makes semi-inclusive hadronic B -> XM decays a powerful probe of the potential nonperturbative nature of charming penguins as well as a useful probe of new physics effects in electroweak flavor changing transitions. A comparison with B -> KX data from BaBar points to an enhanced charming penguin, albeit with large experimental errors.

27 pages, 6 figures

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Cited by in corpus (6)

• Factorization at Subleading Power and Irreducible Uncertainties in $\bar{B}\to X_s\gamma$ Decay
• New Physics at a Super Flavor Factory
• Nonperturbative Charming Penguin Contributions to Isospin Asymmetries in Radiative B decays
• First Measurement of Inclusive B -> X_s eta Decays
• Leading SU(3) breaking in lightcone distribution amplitudes
• Measurement of partial branching fractions of inclusive charmless B meson decays to K+, K0, and pi+