Mass shift of σ-meson in nuclear matter

J. R. Morones-Ibarra, Mónica Menchaca Maciel, Ayax Santos-Guevara, Felipe Robledo Padilla

Resultado de la investigaciónrevisión exhaustiva


The propagation of σ-meson in nuclear matter is studied in the Walecka model, by assuming that the sigma couples to a pair of nucleon-antinucleon states and to particle-hole states. The in-medium effect of σ-ω mixing is also studied. For completeness, the coupling of sigma to two virtual pions was also considered. It is found that the σ-meson mass decreases with respect to its value in vacuum and that the contribution of the σ-ω mixing effect on the mass shift is relatively small.

Idioma originalEnglish
Páginas (desde-hasta)479-485
Número de páginas7
PublicaciónPramana - Journal of Physics
EstadoPublished - 1 mar 2013
Publicado de forma externa

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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