Chiral poles and zeros and the role of the left hand cut

Details Chiral poles and zeros and the role of the left hand cut Chiral poles and zeros and the role of the left hand cut

1996-07-09

arxiv.org/abs/hep-ph/9607266v1

Z.Phys. C75 (1997) 113-118

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, Latex, 6 Postscript figures

Scientific paper

It has been recently claimed that the Inverse Amplitude Method provides a reliable unitarisation of Chiral Perturbation Theory allowing resonance poles to be accurately uncovered. We illustrate the sensitivity of these claims to the treatment of the Adler zero and to assumptions about the left hand cut (and hence about the underlying exchange forces). Previously favoured methods are shown to mistreat the Adler zeros and violate crossing symmetry casting doubt on the precision of their phenomenology. A more reliable solution is proposed.

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