Chiral Lagrangians with tensor sources

Details Chiral Lagrangians with tensor sources Chiral Lagrangians with tensor sources

2007-09-20

arxiv.org/abs/0709.3157v1

AIP Conf.Proc.964:34-39,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given at the 4th International Worshop on Quantum ChromoDynamics, Theory and experiment, June 16-20, 2007. Martina Franca

Scientific paper

10.1063/1.2823876

The implementation of tensor sources in Chiral Lagrangians allows the computation of Green functions and form factors involving tensor currents, that is, quark bilinears of the form \bar{q}_i\sigma^{\mu\nu}q_j. Whereas only four new terms show up at O(p^4), we find around a hundred of them at O(p^6). So it becomes essential to ensure that this set o operators is indeed minimal and non-redundant (i.e., it is a basis). We discuss two phenomenological applications in the context of vector meson resonances and the radiative pion decay.

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