QCD phase diagram from chiral symmetry restoration: analytic approach at high and low temperature using the linear sigma model with quarks
Título del documento: QCD phase diagram from chiral symmetry restoration: analytic approach at high and low temperature using the linear sigma model with quarks
Revista: Revista mexicana de física
Base de datos: PERIÓDICA
Número de sistema: 000426119
ISSN: 0035-001X
Autores: 1
1
1
Instituciones: 1Universidad Nacional Autónoma de México, Instituto de Ciencias Nucleares, Ciudad de México. México
2University of Cape Town, Department of Physics, Ciudad del Cabo. Sudáfrica
Año:
Periodo: May-Jun
Volumen: 64
Número: 3
País: México
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico, teórico
Resumen en inglés We use the linear sigma model with quarks to study the QCD phase diagram from the point of view of chiral symmetry restoration. We compute the leading order effective potential for high and low temperatures and finite quark chemical potential, up to the contribution of the ring diagrams to account for the plasma screening effects. We fix the values of the model couplings using physical values for the input parameters such as the vacuum pion and sigma masses, the critical temperature at vanishing quark chemical potential and the conjectured end point value of the baryon chemical potential of the transition line at vanishing temperature. We also make the analysis for the same input parameters but with vanishing pion mass. We find that the critical end point (CEP) is located at low temperatures and high quark chemical potentials (315 < μ CEP < 349 MeV, 18 < T CEP < 45 MeV)
Disciplinas: Física y astronomía
Palabras clave: Física,
Diagrama de fase QCD,
Modelo sigma lineal,
Simetría quiral,
Punto final crítico
Keyword: Physics,
QCD phase diagram,
Linear sigma model,
Chiral symmetry,
Critical end point
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