Charged Pion Polarizabilities to two Loops

Details Charged Pion Polarizabilities to two Loops Charged Pion Polarizabilities to two Loops

1996-02-28

arxiv.org/abs/hep-ph/9602421v1

Phys.Lett.B377:147-152,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, LaTeX, uses epsf.sty and cite.sty, one postscript picture included

Scientific paper

10.1016/0370-2693(96)00304-8

We evaluate the electric and magnetic polarizabilities of charged pions in the framework of chiral perturbation theory at next-to-leading order. This requires a two-loop evaluation of the Compton amplitude near threshold. We estimate the two new low-energy constants which enter the chiral expansion at this order with resonance saturation. The numerical results are compared with presently available experimental information.

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