Document Type

Article

Date

1-26-2006

Language

English

Disciplines

Physics

Description/Abstract

Within a linear sigma model framework, possible mixing between two chiral nonets (a two quark nonet, and a four quark nonet) below 2 GeV is studied. Incorporating the U(1)_A behavior of the underlying QCD, and working in the isospin invariant limit, the mass spectra of the I=0, I=1/2 and I=1 pseudoscalars, and the I=1/2 scalars are studied, and estimates of their quark content are presented. It is found, as expected, that the ordinary and the excited pseudoscalars generally have much less two and four quark admixtures compared to the respective scalars. As by-products, several quantities such as the four quark vacuum condensate, and the decay constant of excited states are predicted.

Additional Information

Talk given at the 27th Annual MRST Conference, May 16-18, SUNYIT, Utica, NY More information available at http://arxiv.org/abs/hep-ph/0601216

Source

Harvested from Arxiv.org

Creative Commons License


This work is licensed under a Creative Commons Attribution 3.0 License.

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