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    4. Volume 68
    5. Issue 6

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/068/06/0925-0930

    • Keywords

       

      Sigma meson; scalar mesons; light mesons.

    • Abstract

       

      We calculate the physical mass and the width of the sigma meson by considering that it couples in vacuum to two virtual pions. The mass is calculated by using the spectral function, and we find that it is about 600 MeV. In addition, we obtained 220 MeV as the value for the width of its spectral function. The value obtained for the mass is in good agreement with that reported in the Particle Data Book for the σ-meson, which is also named $f_{0}$(600). This result also shows that 𝜎-meson can be considered as a two-pion resonance.

    • Author Affiliations

       

      J R Morones-Ibarra1 Ayax Santos-Guevara1

      1. Facultad de Ciencias Físico-Matemáticas, Universidad Autónoma, de Nuevo León, Ciudad Universitaria, San Nicolás de los Garza, Nuevo León, 66450, México

    • Dates

       
      Published
      June 2007
      Manuscript received
      24 January 2007
      Manuscript revised
      26 March 2007
      Accepted
      11 April 2007

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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