Wednesday 09 July 2008

Speaker: David Bugg   (Queen Mary)

Title: Why some resonances synchronise on thresholds; implications for Confinement

Abstract: The f0(980), a0(980) and many other resonances lock onto inelastic thresholds. A simple general
mechanism will be described. It involves meson exchanges. The fact that these cannot be ignored leads to
the implication that the Confinement Potential is not purely due to short-range gluon exchanges but must 
have a component arising from long-range meson exchanges. This relates to decay modes of the resonances
and can be viewed as a higher order QCD effect. It is closely analogous to the covalent bond in chemistry
and also relatesto Duality in the resonance regime.  It reorganises many of the current concepts about
Confinement and how confined states decay.