Abstract
In this contribution, we briefly analyze the formalism of the unquenched quark model (UQM) and its application to the description of several observables of hadrons. In the UQM, the effects of charges sea pairs are introduced explicitly into the quark model through a QCD- inspired 3P0 pair-creation mechanism. We present our description of flavour asymmetry and strangeness in the proton when baryon-meson components are included. In the meson sector, the charmonium and bottomonium spectra with self-energy corrections due to the coupling to the meson-meson components.
Highlights
The quark model [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] can reproduce the behavior of observables such as the spectrum and the magnetic moments in the baryon and meson sector, but it neglects quarkantiquark pair-creation effects
We present our description of flavour asymmetry and strangeness in the proton when baryon-meson components are included
These couplings lead to strong decays and below threshold, they lead to virtual qq − qq components in the hadron wave function and shifts of the physical mass with respect to the bare mass
Summary
Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, AP 70-543, 04510 Mexico DF, Mexico Dipartimento di Fisica and INFN, Universitadi Genova, via Dodecaneso 33, I-16146 Genova, Italy.
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