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

G.I. Lykasov; W. Cassing; A. Sibirtsev; M.V. Rzjanin

doi:doi:10.1007/s100500050319

EPJ

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

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