The WA3 data and the two $K_1(1270)$ resonances
High Energy Physics - Phenomenology
2007-11-30 v1
Abstract
Recent studies based on unitary chiral perturbation theory (UPT) found that the low-lying axial vector mesons can be dynamically generated due to the interaction of the pseudoscalar octet of the pion and the vector nonet of the rho. In particular, two poles in the second Riemann sheet have been associated to the nominal resonance. In this talk, we present a recent analysis of the WA3 data on at 63 GeV using the UPT amplitudes, and show that it is in favor of the existence of two 's [Phys. Rev. D 75, 014017 (2007)].
Cite
@article{arxiv.0711.4778,
title = {The WA3 data and the two $K_1(1270)$ resonances},
author = {L. S. Geng and E. Oset and L. Roca and J. A. Oller},
journal= {arXiv preprint arXiv:0711.4778},
year = {2007}
}
Comments
8 pages, 2 figures, to appear in the proceedings of XII International Conference on Hadron Spectroscopy (HADRON07), Frascati, Italy, 8-13 October 2007