$ωN$ final state interactions and $ω$-meson production from heavy-ion collisions

Details $ωN$ final state interactions and $ω$-meson production from heavy-ion collisions $ωN$ final state interactions and $ω$-meson production from heavy-ion collisions

1998-11-05

arxiv.org/abs/nucl-th/9811019v4

Eur.Phys.J. A6 (1999) 71-81

Physics

Nuclear Physics

Nuclear Theory

Changed content. 10 pages. 17 figures

Scientific paper

10.1007/s100500050319

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 $^{12}C{+}^{12}C, ^{40}Ca{+}^{40}Ca$ and $^{58}Ni{+}^{58}Ni$ reactions at about 2 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.

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