ar X iv : h ep - p h / 04 05 14 5 v 3 3 N ov 2 00 4 Domain Wall in the Linear Sigma Model ∗
نویسنده
چکیده
We discuss the role of the axial U(1)A symmetry in the chiral phase transition using the U(Nf )R× U(Nf )L linear sigma model with two massless quark flavors. We expect that above a certain temperature the axial U(1)A symmetry will be effectively restored as well as SU(Nf )R×SU(Nf )L. Then we can construct a string-like static solution of the η string and a kink-like classical solution of the domain wall during the chiral phase transition. We give out the possible signals for detecting the domain wall in ultrarelativistic heavy-ion collisions. PACS number(s): 25.75.-q, 12.39.Fe, 98.80.Cq
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