A quark loop model for heavy mesons

Abstract

Abstract. I consider a model based on a quark-meson interaction Lagrangian. The transition amplitudes are evaluated by computing diagrams in which heavy and light mesons are attached to quark loops. The light chiral symmetry relations and the heavy quark spin-flavour symmetry dictated by the heavy quark effective theory are implemented. The model allows to compute the decay form factors and therefore can give predictions for the decay rates, the invariant mass spectra and the asymmetries.

Theory summary

“…At the LHC, top production is a very abundant process, thus offering new opportunities for the search of new physics effects in flavour violating top decays [3] and in anomalous couplings [3][4][5]. Signals of new physics are expected to become stronger for highly boosted tops.…”