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Effective lagrangian for heavy and light mesons. Semileptonic decays

Nardulli, G.
Published in Physics Letters. B. 1993, vol. 299, no. 1-2, p. 139-150
Abstract We introduce an effective lagrangian including negative and positive parity heavy mesons containing a heavy quark, light pseudoscalars, and light vector resonances, with their allowed interactions, using heavy quark spin-flavour symmetry, chiral symmetry, and the hidden symmetry approach for light vector resonances. On the basis of such a lagrangian, by considering the allowed weak currents and by including the contributions from the nearest unitarity poles we calculate the form factors for semileptonic decays of B and D mesons into light pseudoscalars and light vector resonances. The available data, together with some additional assumptions, allow for a set of predictions in the different semileptonic channels, which can be compared with those following from different approaches. A discussion of non-dominant terms in our approach, which attempts at including a rather complete dynamics, will however have to wait till more abundant data become available.
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CASALBUONI, Roberto et al. Effective lagrangian for heavy and light mesons. Semileptonic decays. In: Physics Letters. B, 1993, vol. 299, n° 1-2, p. 139-150. https://archive-ouverte.unige.ch/unige:91487

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Deposited on : 2017-01-31

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