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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/080/03/0479-0485

    • 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

       
      Published
      March 2013
      Manuscript received
      13 July 2011
      Manuscript revised
      8 March 2012
      Accepted
      22 August 2012

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