Scalar mesons from an effective Lagrangian approach

Details Scalar mesons from an effective Lagrangian approach Scalar mesons from an effective Lagrangian approach

2007-11-14

arxiv.org/abs/0711.2275v3

ECONFC070910:107,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 5 figures, menu 2007 talk

Scientific paper

A brief discussion of the recent interest in light scalar mesons motivates the study of a generalized linear sigma model. In an SU(3) flavor invariant version of the model there is a prediction that the the lighter scalars have sizeable "four quark" content. It is further predicted that one of the singlet scalars should be exceptionally light. Due to the presence of scalar mesons, the model gives "controlled" corrections to the current algebra formula for threshold pion pion scattering. These corections act in the direction to improve agreement with current experiments.

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