Investigation of light scalar resonances at COSY
Loading...
Date
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
The $a_0$(980) and $f_0$(980) resonances are two well established states in the excited meson spectrum. We review the most prominent theoretical models which try to explain the structure of these states. It is discussed whether data from COSY on $a_0$ and $f_0$ production in $pp$, $pn$, $pd$ and $dd$ collisions allow to distinguish between the different approaches. Very promising in this respect seems to be the measurement of the reaction $dd \to (\mathrm{^4He} a_0^0 \to) \mathrm{^4He} π^0η$ which violates isospin conservation and can be related to $a_0$-$f_0$ mixing.
Contribution to the workshop on the future physics program at COSY-Juelich, CSS2002 (8 pages, no figures)
Contribution to the workshop on the future physics program at COSY-Juelich, CSS2002 (8 pages, no figures)