Cross-Symmetric Expansion of $\pi \pi$ Amplitude Near Threshold
High Energy Physics - Phenomenology
2007-05-23 v1
Abstract
The near-threshold expansion of the amplitude is developed using the crossing-covariant independent variables. The independent threshold parameters entering the real part of the amplitude in an explicitly Lorentz-invariant way are free from restrictions of isotopic and crossing symmetries. Parameters of the expansion of the imaginary part are recovered by the perturbative unitarity relations.
Keywords
Cite
@article{arxiv.hep-ph/9612473,
title = {Cross-Symmetric Expansion of $\pi \pi$ Amplitude Near Threshold},
author = {A. A. Bolokhov and T. A. Bolokhov and I. S. Manida and M. V. Polyakov and S. G. Sherman},
journal= {arXiv preprint arXiv:hep-ph/9612473},
year = {2007}
}
Comments
17 pages, Latex (uses psfig.sty), 1 Postscript figure, submitted to YaF