Current quark mass effects on chiral phase transition of QCD in the improved ladder approximation

Details Current quark mass effects on chiral phase transition of QCD in the improved ladder approximation Current quark mass effects on chiral phase transition of QCD in the improved ladder approximation

2001-01-11

arxiv.org/abs/hep-ph/0101110v2

Phys.Rev. D63 (2001) 116009

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 13 figures

Scientific paper

10.1103/PhysRevD.63.116009

Current quark mass effects on the chiral phase transition of QCD is studied in the improved ladder approximation. An infrared behavior of the gluon propagator is modified in terms of an effective running coupling. The analysis is based on a composite operator formalism and a variational approach. We use the Schwinger-Dyson equation to give a ``normalization condition'' for the Cornwall-Jackiw-Tomboulis effective potential and to isolate the ultraviolet divergence which appears in an expression for the quark-antiquark condensate. We study the current quark mass effects on the order parameter at zero temperature and density. We then calculate the effective potential at finite temperature and density and investigate the current quark mass effects on the chiral phase transition. We find a smooth crossover for $T>0$, $\mu=0$ and a first-order phase transition for $\mu>0$, T=0. Critical exponents are also studied and our model gives the classical mean-field values. We also study the temperature dependence of masses of scalar and pseudoscalar bosons. A critical end point in the $T$-$\mu$ plane is found at $T \sim 100$ MeV, $\mu \sim 300$ MeV.

Affiliated with

Also associated with

No associations

Rating

Current quark mass effects on chiral phase transition of QCD in the improved ladder approximation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Current quark mass effects on chiral phase transition of QCD in the improved ladder approximation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current quark mass effects on chiral phase transition of QCD in the improved ladder approximation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-564631