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SUMMARY:Semi-relativistic potential model for low-lying three-gluon glueba
 lls
DTSTART;VALUE=DATE-TIME:20061215T110000Z
DTEND;VALUE=DATE-TIME:20061215T120000Z
DTSTAMP;VALUE=DATE-TIME:20261112T170631Z
UID:indico-event-1540@indico.ific.uv.es
DESCRIPTION:The Quantum Chromodynamic (QCD) is the modern theory of the st
 rong interaction. The QCD allows the coupling of gluons\, the gauge partic
 les of the interaction\, which can in theory form a observable state. Thes
 e bound states of gluons are called glueballs. The glueballs haven't been 
 observed yet but it seems that they mix strongly with the light mesons in 
 observed states. The glueballs spectrum deserved interest for the understa
 nding of such exotic system.\nWe propose to study the spectrum of the thre
 e-gluon glueballs from the point of view of the potential models. In this 
 approach\, the spectrum is given by the eigenvalues of a Hamiltonian. This
  Hamiltonian is the sum of a semi-relativistic kinetic operator and a pote
 ntial. In QCD\, the potential is given by the sum of a perturbative part a
 rising from a non relativistic reduction of Feynman diagrams at lower orde
 r and a confining potential simuling the non perturbative part of the inte
 raction. We consider effective gluons with a mass given by the confinement
  and with a size to avoid problems induced by the perturbative part of the
  potential. The Hamiltonian depends on three parameters : the strong coupl
 ing constant\, the string tension and the gluon size. These parameters was
  fitted on the two-gluon glueballs. Our spectrum for the three-gluon glueb
 alls are in good agreement with the lattice results. [V.~Mathieu\, C.~Sema
 y and B.~Silvestre-Brac\, Phys.\\ Rev.\\ D {\\bf 74} (2006) 054002 hep-ph/
 0605205]\n\nhttps://indico.ific.uv.es/event/1540/
LOCATION:Dpto. de Física Teórica (UVEG) Sala Seminarios
URL:https://indico.ific.uv.es/event/1540/
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