1999/05/15 by Aldo Deandrea, Deandrea, Aldo
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9905355
Contribution to the Proceedings of the XXXIVth Rencontres de Moriond, QCD and High Energy Hadronic Interactions, Les Arcs 1800, France, March 20-27, 1999
arxiv created 1999/05/15 · arxiv updated 2009/11/30
I consider a model for heavy meson decays based on an effective quark-meson Lagrangian. The model is constrained by the known symmetries of QCD in the mQ -> infinity limit for the heavy quarks, and chiral symmetry in the light quark sector. Using a limited number of free parameters it is possible to compute several phenomenological quantities, e.g. the leptonic B and B** decay constants; the Isgur-Wise form factors: xi, tau(3/2), tau (1/2), describing the semi-leptonic decays B -> D(*) l nu, B -> D** l nu; the form factors for heavy to light decays B -> rho l nu, B -> a1 l nu. I show that the semileptonic heavy-to-light form factors calculated in the model fulfill the general relations that hold in QCD in the large energy limit for the final hadron.