Effective chiral lagrangian in the chiral limit from the instanton vacuum

Details Effective chiral lagrangian in the chiral limit from the instanton vacuum Effective chiral lagrangian in the chiral limit from the instanton vacuum

2003-08-17

arxiv.org/abs/hep-ph/0308171v1

Phys.Rev. D69 (2004) 054004

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 5 figures, submitted to Phys.Rev. D

Scientific paper

10.1103/PhysRevD.69.054004

We study the effective chiral Lagrangian in the chiral limit from the instanton vacuum. Starting from the nonlocal effective chiral action, we derive the effective chiral Lagrangian, using the derivative expansion to order $O(p^4)$ in the chiral limit. The low energy constants, $L_1$, $L_2$, and $L_3$ are determined and compared with various models and the corresponding empirical data. The results are in a good agreement with the data. We also discuss about the upper limit of the sigma meson, based on the present results.

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