Ising 2D T’-Expansion Scheme (TExS)
The Ising-2DTExS module of the NSF-funded MUSES project enables to calculate a family of 2D equations of state of nuclear matter, at finite temperature \(T\) and finite baryon chemical potential \(\mu_B\), including a \(1^{st}\) order phase transition and a critical point. It employs the so-called \(T'\) Expansion Scheme, based on an effective temperature \(T'\) which is defined as an expansion in \(\mu_B\), using lattice coefficients \(\kappa\) computed at \(\mu_B=0\) as expansion coefficients (with \(\kappa\) coefficients being related to susceptibilities \(\chi\)). The critical point, which critical region can be shaped freely and location can be chosen along a parametrized transition line, is mapped to QCD from the 3D Ising model universality class.
It can be used to compute nuclear equations of state for a temperature range of \(30 < T < 800\) MeV, and for baryon chemical potential values of \(0 < \mu_B < 700\) MeV, at \(\mu_Q = \mu_S = 0\) MeV.
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