Revista: | Revista mexicana de física |
Base de datos: | PERIÓDICA |
Número de sistema: | 000426119 |
ISSN: | 0035-001X |
Autores: | Ayala, Alejandro1 Hernández Ortiz, S1 Hernández, L.A1 |
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: | 2018 |
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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