scholarly journals Nonlinear sigma models at nonzero chemical potential: Breaking up instantons and the phase diagram

2014 ◽  
Vol 90 (10) ◽  
Author(s):  
Falk Bruckmann ◽  
Tin Sulejmanpasic
Keyword(s):  
Phase Diagram ◽  
Sigma Models ◽  
Chemical Potential ◽  
Nonlinear Sigma Models

scholarly journals Using the Linear Sigma Model with quarks to describe the QCD phase diagram and to locate the critical end point

2018 ◽  
Vol 172 ◽  
pp. 08002
Author(s):  
Alejandro Ayala ◽  
Jorge David Castaño-Yepes ◽  
José Antonio Flores ◽  
Saúl Hernández ◽  
Luis Hernández
Keyword(s):  
Phase Diagram ◽  
Critical Temperature ◽  
Sigma Model ◽  
Chemical Potential ◽  
Linear Sigma Model ◽  
Transition Line ◽  
Baryon Chemical Potential ◽  
First Order ◽  
Qcd Phase Diagram ◽  
Crossover Transition

We study the QCD phase diagram using the linear sigma model coupled to quarks. We compute the effective potential at finite temperature and quark chemical potential up to ring diagrams contribution. We show that, provided the values for the pseudo-critical temperature Tc = 155 MeV and critical baryon chemical potential μBc ≃ 1 GeV, together with the vacuum sigma and pion masses. The model couplings can be fixed and that these in turn help to locate the region where the crossover transition line becomes first order.

scholarly journals Manifest supersymmetry for BPS walls in nonlinear sigma models

2003 ◽  
Vol 652 ◽  
pp. 35-71 ◽  
Author(s):  
Masato Arai ◽  
Masashi Naganuma ◽  
Muneto Nitta ◽  
Norisuke Sakai
Keyword(s):  
Sigma Models ◽  
Nonlinear Sigma Models

scholarly journals Exact classical solutions of nonlinear sigma models on supermanifolds

2007 ◽  
Vol 772 (3) ◽  
pp. 371-384
Author(s):  
Ryu Sasaki ◽  
Wen-Li Yang ◽  
Yao-Zhong Zhang
Keyword(s):  
Sigma Models ◽  
Classical Solutions ◽  
Nonlinear Sigma Models
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