Lattice2010

Session

Parallel 05: Vacuum structure and confinement

14 Jun 2010, 14:30

Villasimius, Sardinia

60. Lattice QCD Study for Gluon Propagator and Gluon Spectral Function

Hideo Suganuma (Department of Physics, Kyoto University)

14/06/2010, 14:30

Vacuum structure and confinement

The gluon propagator is studied in the Landau gauge in SU(3) lattice QCD at beta=5.7, 5.8 and 6.0 at the quenched level. Through the functional-form analysis of the gluon propagator obtained in lattice QCD, we find that the Landau-gauge gluon propagator is well described by the Yukawa-type function e^{-mr}/r with m=600MeV for r=0.1-1.0fm in the four-dimensional Euclidean space-time...

58. Lattice QCD analysis for the instantaneous interquark potential in the generalized Landau gauge

Takumi Iritani (Kyoto University)

14/06/2010, 14:50

Vacuum structure and confinement

We analyze the instantaneous interquark potential in the generalized Landau gauge (lambda gauge) in SU(3) lattice QCD. Using this gauge, we can analyze continuous change of gluon properties from the Landau gauge toward the Coulomb gauge. In the Coulomb gauge, the instantaneous potential is expressed by the Coulomb plus linear potential, with about two times larger string tension. In...

20. Relevant momentum components of gluons for confinement and chiral symmetry breaking

Arata Yamamoto (Kyoto University)

14/06/2010, 15:10

Vacuum structure and confinement

We investigated which momentum components of gluons induce confinement and chiral symmetry breaking in lattice QCD. For this purpose, we formulated a new framework to introduce the momentum cutoff to the link variable. We found that confinement and chiral symmetry breaking are induced by different momentum components of gluons.

43. The glueball spectrum at large N

Enrico Rinaldi (SUPA, School of Physics and Astronomy, University of Edinburgh)

14/06/2010, 15:30

Vacuum structure and confinement

Using variational techniques, we measured the masses of the ground-state glueballs and some of their excitations in all the irreducible representationsof the cubic group in SU(N) gauge theories for N ranging from 3 to 8,at fixed lattice spacing in the scaling region, where some features of the continuum spectrum are already manifest. For this calculation, we developed an automated...

221. Can Lorentz-breaking fermionic condensates form in large N strongly-coupled LGT?

Terry E Tomboulis (UCLA Department of Physics)

14/06/2010, 15:50

Vacuum structure and confinement

The possibility of Lorentz symmetry (spontaneous) breaking (LSB) has attracted considerable attention in recent years for a variety of reasons, including the attractive prospect of the graviton as a Goldstone boson. Though a number of effective field theory analyses of such phenomena have recently been given it remains an open question whether they can take place in an underlying UV...