The unquenched QM

Abstract

In this contribution, we briefly analyze the formalism of the unquenched quark model (UQM) and its application to the calculation of hadron spectra with self-energy corrections, due to the coupling to the meson-meson continuum. In the UQM, the effects of $q\bar{q}$ sea pairs are introduced explicitly into the quark model through a QCD-inspired ${}^3{P}_0$ pair-creation mechanism. The UQM formalism can be extended to include also the effects of hybrid mesons, i.e. hybrid loops. The main applications to spectroscopy and decays are analyzed.

Comments: Presented at EEF70, Workshop on Unquenched Hadron Spectroscopy: Non-Perturbative Models and Methods of QCD vs. Experiment on the occasion of Eef van Beveren's 70th birthday, 1-5 September 2014, University of Coimbra, Portugal. arXiv admin note: substantial text overlap with arXiv:1503.02968