Departamento de Gravitación y Teoría de Campos

                          Seminarios 2013

  

                          Instituto de Ciencias Nucleares, UNAM
[ ICN-UNAM]

Jueves 12 de septiembre, a las 17:00 hrs en la Sala de Seminarios del ICN

Giuseppe Galata (ICN, UNAM)

Heavy quarkonium hybrids from Coulomb gauge QCD

The hybrids are mesons with constituent gluonic components. The most commonly studied hybrids are composed of a quark, an antiquark and a gluon. These mesons are studied in a variational approach to QCD in the Coulomb gauge. This particular gauge has been chosen for its advantages, in particular in the Coulomb gauge the degrees of freedom are physical. Within the variational approach, a confining linear potential has been shown to emerge from the Dyson-Schwinger equations, at least at the hadronic scale. This potential has been used to first calculate the spectrum of the gluelump, which is an idealized system defined as gluonic excitations bounded to a static, localized color octet source (for example a very heavy quark and antiquark). The next step has been to introduce the quark-antiquark dynamics to calculate the spectrum of heavy hybrid mesons. Our results are in good agreement with the lattice data.