Specific Research Areas

Hadron structure from Lattice QCD

The goal of this line of research is to understand key aspects of the structure of hadrons from first principles using lattice QCD. It directly addresses timely experimental developments at major Labs. and significant physical questions concerning hadron structure. Such studies include:

  • Gauge invariant study of hadron charge and matter distributions

  • Electromagnetic elastic and transition form factors

  • Baryonic potential

SU(N) gauge theories

Recent studies in string theory and the AdS/CFT correspondence are beginning to shed some light in QCD, in the limit of an infinite number of colors N. This exciting development calls for detailed comparison with numerical simulation results of QCD at large N.

Topology, Confinement and chiral symmetry breaking

A theoretical understanding of confinement and chiral symmetry breaking in QCD  is closely coupled to the experimental efforts at large colliders for the establishment of the new state of quark matter.

We are involved in a number  of developments regarding these issues:
  • Development of cooling algorithms to study instantons which are thought to be the relevant degrees of freedom for chiral symmetry breaking.
  • Center vortices could provide  the relevant degrees of freedom for confinement and chiral symmetry breaking.
  • The multiboson algorithm for dynamical fermion simulations  applied to the study finite temperature phase transitions for odd numbers of flavours.

A main line of research  regards the calculation of a number of renormalization functions in Lattice QCD. We have been actively pursuing this topic in the past years, with a number of collaborators from the Universities of Cyprus and Pisa. Knowledge of these renormalization functions is necessary in order to relate numerical results, coming from Monte Carlo simulations, to physical observables.

A further application is in theories with exact chiral invariance. The fact that such theories can be consistently defined nonperturbatively has been realized only recently, after decades of elusive results, and at present constitutes a very exciting and promising issue in the context of both QCD and the Standard Model.
High performance computing

The numerical simulation of QCD is computationally very demanding and as such it is at the frontier of computer developments.










Design: C. Ioannou 


Last updated 02 Feb 2005. Your comments and questions are welcome.
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