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Renormalization of the f0(980) and a0(980) scalar resonances in a nuclear medium

✍ Scribed by E. Oset; M.J. Vicente Vacas

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
226 KB
Volume
678
Category
Article
ISSN
0375-9474

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✦ Synopsis

The meson-meson interaction in the scalar sector in the presence of a nuclear medium is studied with particular attention to the change of the properties of the f 0 (980) and a 0 (980) resonances. By using a chiral unitary approach which generates the f 0 and a 0 resonances and reproduces their free properties, we find that the position of the resonances in the medium is barely changed but their widths are considerably broadened. New many body corrections generating from higher orders in the chiral Lagrangian plus the contribution from N * h excitations, not considered before in connection with the ππ interaction in the nuclear medium, are also investigated.

πŸ“œ SIMILAR VOLUMES

Finite energy sum rule determination of
Finite energy sum rule determination of the scalar meson decay constants and the nature of the a0(980)
✍ Kim Maltman πŸ“‚ Article πŸ“… 2000 πŸ› Elsevier Science 🌐 English βš– 245 KB

A form of QCD sum rules, tested and found to be very reliable in the isovector vector channel, is used to determine the scalar current decay constants of the a0 resonances. Comparison to the corresponding decay constant of the K~( 1430) is used to shed light on the nature of the a0(980). It is shown