From: Gunnar Bali <troubles@fisica.unimi.it>
Newsgroups: milano.seminari
Subject: 02-12-2003 Glueballs and exotics
Date: 1 Dec 2003 09:58:30 GMT

                               Seminario Teorico

                              Il giorno 02-12-2003
                        alle ore 14:30 in Aula Consiglio

                                  Gunnar Bali
                             University of Glasgow

                        terra' un seminario dal titolo:

                             Glueballs and exotics

                                   Abstract:
   In the quark model so-called baryons and mesons exist of which the former
   contain three quarks and the latter a quark and an antiquark. However, in
principle more hadronic states could exist, for instance containing 2 quarks and
 2 antiquarks (molecules) or 4 quarks and one antiquark (pentaquark). Moreover,
 unlike the photons of QED the gluons of QCD, the fundamental theory of strong
interactions, carry charge which means that in principle massive purely gluonic
states (glueballs) might exist. In addition, one can imagine mesonic states with
   additional constituent glue (hybrid mesons). While more and more accurate
theoretical predictions for the phenomenology of such exotic states exist, only
 in the past few years convincing experimental candidates have been identified.
    We will review experimental and theoretical status (mainly from lattice
                 simulations) in the area of non-standard hadr