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    • Keywords


      Scalar mesons; hadrons in dense matter; spectral function; dense nuclear matter.

    • Abstract


      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 $\sigma -\omega$ 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 $\sigma -\omega$ mixing effect on the mass shift is relatively small.

    • Author Affiliations


      J R Morones-Ibarra1 Mónica Menchaca Maciel1 Ayax Santos-Guevara2 Felipe Robledo Padilla1

      1. Facultad de Ciencias Físico-Matemáticas, Universidad Autónoma de Nuevo León, UANL, Av. Universidad S/N Ciudad Universitaria, San Nicolás de los Garza, Nuevo León, C.P. 66451, México
      2. Facultad de Ingeniería y Arquitectura, Universidad Regiomontana, 15 de Mayo 567, Monterrey, N.L., 64000, México
    • Dates

  • Pramana – Journal of Physics | News

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