Isoscalar S-wave π–π interaction in the nuclear medium
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Isoscalar S-wave π–π interaction in the nuclear medium

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Isoscalar S-wave π–π interaction in the nuclear medium

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Vicente Vacas, Manuel José Perfil; Oset Báguena, Eulogio Perfil; Chiang, H.C.
This document is a artículo publicadoDate1998
The s-wave isoscalar π π scattering amplitude in a nuclear medium has been evaluated using a non-perturbative unitary coupled channels method and the standard chiral Lagrangians. The method is successful describing the π π properties in vacuum, in the scalar-isoscalar channel up to 1.2 GeV giving rise to poles in the T matrix for the ƒ0(980) and the σ. The extension of the method to the nuclear medium implies the renormalization of the pions in the medium and also the introduction of interaction terms related to contact terms in the πN → ππN reaction.

    VICENTE VACAS, Manuel Jose, Oset Baguena, Eulogio ; Chiang, H.C., 1998, Isoscalar S-wave π–π interaction in the nuclear medium, Acta Physica Polonica B, vol. 29, no. 11, p. 3137-3140
http://th-www.if.uj.edu.pl/acta/vol29/pdf/v29p3137.pdf
distribuido bajo licencia Creative Commons de Reconocimiento-NoComercial 3.0 No adaptada

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