New insights into antikaon-nucleon scattering and the structure of the Lambda(1405)
Nuclear Theory
2013-03-11 v1 High Energy Physics - Phenomenology
Nuclear Experiment
Abstract
We perform a combined analysis of antikaon-nucleon scattering cross sections and the recent SIDDHARTA kaonic hydrogen data in the framework of a coupled-channel Bethe-Salpeter approach at next-to-leading order in the chiral expansion of the effective potential. We find a precise description of the antikaon-proton scattering amplitudes and are able to extract accurate values of the scattering lengths, a0=-1.81^+0.30_-0.28 + i 0.92^+0.29_-0.23 fm, a1=+0.48^+0.12_-0.11 + i 0.87^+0.26_-0.20 fm. We also discuss the two-pole structure of the Lambda(1405).
Keywords
Cite
@article{arxiv.1202.2030,
title = {New insights into antikaon-nucleon scattering and the structure of the Lambda(1405)},
author = {Maxim Mai and Ulf-G. Meißner},
journal= {arXiv preprint arXiv:1202.2030},
year = {2013}
}
Comments
7 pages, 4 figures