Theoretical and phenomenological constraints on form factors for radiative and semi-leptonic B-meson decays
نویسندگان
چکیده
منابع مشابه
Radiative Leptonic Decays of B c Meson
To the leading order, the radiative leptonic decays Bc → γlν̄ ( l = e, μ ) are studied carefully. In the study, a non-relativistic constituent quark model and the effective Lagrangian for the heavy flavour decays are used. As a result, the branching ratios turn out to be of the orders of 10 for Bc → γμν̄ or for Bc → γeν̄. Based on the study, we point out the decays being accessible experimentally ...
متن کاملRadiative and Leptonic B-meson Decays from the B-factories
Radiative penguin decays of B-mesons, in which a b quark transitions to an s or d quark accompanied by either a photon or a pair of charged leptons (Fig. 1), are a sensitive probe of New Physics (NP) beyond the Standard Model (SM). These flavour changing neutral current decays are forbidden at tree level in the SM and hence strongly suppressed. In many NP scenarios these decays appear at the on...
متن کامل, B – B̄ mixing , radiative penguin and rare ( semi ) leptonic decays
CKM03 WG2 Conveners' Report: V td and V ts , B– ¯ B mixing, radiative penguin and rare (semi)leptonic decays We introduce the Working Group 2 proceedings contributions from the 2nd workshop on the CKM Unitarity Triangle and note their connection to the proceedings of the first workshop. The topic of WG 2 was the determination of the CKM matrix elements V td and V ts from B-¯ B mixing, radiative...
متن کاملForm Factors for Semi-Leptonic and Radiative Decays of Heavy Mesons to Light Mesons
To know and understand form factors of hadronic currents is of decisive importance for analysing exclusive weak decays. The ratios of different form factors of a given process depend on the relativistic spin structure of initial and final particles. It is shown — assuming simple properties of the spectator particle — that these ratios can entirely be expresssed in terms of particle and quark ma...
متن کاملLeptonic and semi - leptonic B decays
We present results for the semi-leptonic and leptonic decays of B mesons. These non-perturbative matrix elements are important for constraining the CKM matrix. Results are presented for the pseudoscalar and vector decay constants, as well as flavour breaking ratios and heavy quark symmetry relations. We consider the chiral and momentum dependence of the semi-leptonic form factors of the decay B...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2010
ISSN: 1029-8479
DOI: 10.1007/jhep09(2010)090