2017 Impact factor 2.799
Hadrons and Nuclei
Eur. Phys. J. A 6, 71-81

${\omega}N$ final state interactions and $\omega$-meson production from heavy-ion collisions

G.I. Lykasov1 - W. Cassing2 - A. Sibirtsev2 - M.V. Rzjanin1

1 Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
2 Institut für Theoretische Physik, Heinrich-Buff-Ring 16, D-35392 Giessen, Germany

Received: 28 April 1999 / Revised version: 7 June 1999 Communicated by W. Weise

Abstract
We calculate the elastic and inelastic ${\omega}N{\to}{\omega}N$,${\to}{\pi}N$, ${\to}{\rho}N$, ${\to}\rho{\pi}N$, ${\to}\pi{\pi}N$, ${\to}{\sigma}N$ reactions within a boson exchange approximation where the $\omega\rho\pi$ coupling constant and form factor are fixed by the reaction ${\pi}N{\to}{\omega}N$in comparison to the experimental data. We find rather large ${\omega}N$ cross sections at low relative momenta of the $\omega$-meson which leads to a substantial broadening of the $\omega$-meson width in nuclear matter. The implications of the ${\omega}N$ final state interactions are studied for $\omega$ production in 12C+12C, 40Ca+40Ca and 58Ni+58Ni reactions at about 2$\cdot$A GeV within the HSD transport approach; the drastic changes of the transverse mass spectra relative to a general mT-scaling (for $\pi^0$ and $\eta$ mesons) might be controlled experimentally by the TAPS Collaboration.

PACS
25.75.-q Relativistic heavy-ion collisions - 25.80.-e Meson- and hyperon-induced reactions


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