Scalar mesons in a linear sigma model with (axial-)vector mesons

Parganlija, D. and Kovács, Péter and Wolf, György and Giacosa, F. and Rischke, D. H. (2013) Scalar mesons in a linear sigma model with (axial-)vector mesons. AIP CONFERENCE PROCEEDINGS, 1520. pp. 226-231. ISSN 0094-243X

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Abstract

The structure of the scalar mesons has been a subject of debate for many decades. In this work we look for ¯qq states among the physical resonances using an extended Linear Sigma Model that contains scalar, pseudoscalar, vector, and axial-vector mesons both in the non-strange and strange sectors. We perform global fits of meson masses, decay widths and amplitudes in order to ascertain whether the scalar ¯qq states are below or above 1 GeV. We find the scalar states above 1 GeV to be preferred as ¯qq states.

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