Conveners
Special session on QCD
- Robert Pisarski (Brookhaven National Lab.)
Special session on QCD
- Krzysztof Redlich (University of Wroclaw (PL))
Special session on QCD
- There are no conveners in this block
.
We are investigating an approach towards a realistic description of baryon ground and resonant states in a unified framework. It consists of a relativistic constituent-quark model set up along a coupled-channels theory. Thereby it becomes possible to include for baryons beyond three-valence-quark configurations further degrees of freedom that are relevant for a realistic description notably of...
In this presentation we review the treatment of pentaquark exotic baryons in chiral soliton models. Focus is on two topics. First we study baryons that contain a heavy quark (charm or bottom) or anti-quark. This advances the bound state approach to strangeness and particularly shows that the heavy bound state selects the appropriate representation for the light flavor (up, down, strange)...
.
We review the postulate that an SU(2) Yang-Mills theory of scale 10^(-4) eV describes extended thermal photon gases. In particular, we discuss a number of implications for the Cosmic Microwave Background which, in turn, imply a change in the high-z cosmological model. Due to the nontrivial, deconfining thermal ground state of this theory a Planck-scale axion field acquires a potential, and we...
The theta term is an allowable CP violating term in the QCD Lagrangian connected to topology; the coefficient multiplying it is zero to very high accuracy. Despite being very small they way QCD varys with theta allows one to probe aspects of the QCD vacuum including the interplay of chiral physics and topology. This talk discusses the issue with an emphasis on possible scenarios in which the...
Chiralspin SU(2)_CS and SU(2N_F) symmetries
are symmetries of the fermionic charge operator
and of the chromo-electric intraction in QCD. They
contain as subgroups chiral symmeries of the
QCD lagrangian. In addition to the chiral
transformations they include a mixing of the left-
and right-handed components of quarks. They
emerge in QCD upon truncation of the near-zero modes of the Dirac...
Revisiting the fast fermion damping rate calculation in a thermalized QED and/or QCD plasma in thermal equilibrium at 4-loop order, focus is put on a peculiar perturbative structure which has no equivalent at zero-temperature. Not surprisingly, and in agreement with previous C-star-algebraic
analyses, this structure renders the use of thermal perturbation theory more than questionable.
Local formulations of quantum field theory provide a powerful framework in which non-perturbative aspects of QCD can be analysed. In this talk I will outline how this approach can be used to elucidate the general analytic features of QCD propagators.
We study numerically the chromoelectric-chromomagnetic asymmetry of the dimension two gluon condensate as well as the longitudinal gluon propagator at T>Tc in the Landau-gauge SU(2) lattice gauge theory.We show that substantial correlation between the asymmetry and the Polyakov loop as well as the correlation between the longitudinal propagator and the Polyakov loop pave the way to studies of...
