Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-06-07
Pramana 68:925-930,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages, 3 figures
Scientific paper
10.1007/s12043-007-0092-7
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 600MeV. In addition, we obtained the value of 250MeV for the width of its spectral function. The value obtained for the mass, is in an excellent agreement with that reported in the Particle data Book for the sigma meson, which is also named f0(600). This result also shows that the sigma meson can be considered as a two pion resonance.
Guevara Ayax Santos
Morones Ibarra J. R.
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