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Domain Wall in the Linear Sigma Model

Hong Mao·Yunde Li·Tao Huang
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Abstract

We discuss the role of the axial $U(1)_A$ symmetry in the chiral phase transition using the $U(N_f)_R\times U(N_f)_L$ 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 $SU(N_f)_R\times SU(N_f)_L$. Then we can construct a string-like static solution the $η$ string and a kink-like classical solution the domain wall during the chiral phase transition. We give out the possible signals for detecting the domain wall in ultrarelativistic heavy-ion collisions.

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Hong Mao, Yunde Li, Tao Huang. 2004-11-03. Domain Wall in the Linear Sigma Model. https://doi.org/10.1088/0256-307x%2F21%2F11%2F022

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