The width of the $\ddot{I}‰$ meson in dense matter

Abstract

We obtain the width of the $\ddot{I}‰$ meson in dense nuclear matter by taking into account (i) the free decay of the $\ddot{I}‰$ into three pions, which is dominated by $\ddot{I}\ddot{I}€$ mode, (ii) the processes induced by a vector-baryon interaction dominated by vector meson exchange, and (iii) the $\ddot{I}‰\to K\bar{K}$ mechanism in matter. The $\ddot{I}‰$ meson develops an important width in matter, coming from the dominant $\ddot{I}‰\to \ddot{I}\ddot{I}€$ decay mode, with a value of $121\pm 10$ MeV at normal nuclear matter density for an $\ddot{I}‰$ at rest. At finite momentum, the width of the $\ddot{I}‰$ meson increases moderately with values of 200 MeV at 600 MeV/c.

5 pages, 4 figures, contribution to the proceedings of XV International Conference on Hadron Spectroscopy (Hadron 2013) in Nara (Japan), November 4-8, 2013