The unquenched quark model

TL;DR

This paper discusses the unquenched quark model, incorporating sea quark effects into hadron descriptions via a QCD-inspired mechanism, and applies it to analyze flavor asymmetry, strangeness, and meson spectra.

Contribution

It introduces the unquenched quark model formalism and demonstrates its application to hadron observables, including flavor asymmetry and meson spectra, with self-energy corrections.

Findings

Describes flavor asymmetry and strangeness in the proton.

Analyzes meson spectra with self-energy corrections.

Shows the impact of sea quark effects on hadron properties.

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 $q \bar q$ sea pairs are introduced explicitly into the quark model through a QCD-inspired $^{3}P_0$ 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 .