Espectroscopia Mes\'{o}nica Moderna: o Papel Fundamental da Unitariedade
Abstract
The importance of implementing unitarity constraints in meson spectroscopy is very briefly outlined for Portuguese students of engineering sciences and therefore non-experts in the field. After explaining the profound differences between meson spectroscopy and atomic spectroscopy, attention is paid to the shortcomings of standard Breit-Wigner parametrisations in the case of broad and/or overlapping resonances. Finally, the manifestly unitary Resonance-Spectrum-Expansion model, which lies at the heart of a recent invited review paper by the present authors, is graphically presented, together with a simple yet typical application to the long-controversial resonance.
Keywords
Cite
@article{arxiv.2111.02565,
title = {Espectroscopia Mes\'{o}nica Moderna: o Papel Fundamental da Unitariedade},
author = {Eef van Beveren and George Rupp},
journal= {arXiv preprint arXiv:2111.02565},
year = {2021}
}
Comments
in Portuguese. Invited paper for the first new edition (no. 504) of the students journal "T\'{e}cnica" published on 3 November 2021 by the "Associa\c{c}\~{a}o dos Estudantes do Instituto Superior T\'{e}cnico" of IST in Lisbon, Portugal. Article is in Portuguese language, with an English abstract; 4 pages, 5 figures. Link to published version: https://www.paperturn-view.com/?pid=MTk197448&p=25&v=1.1