Meson $m_T$-scaling in heavy-ion collisions at SIS energies

Details Meson $m_T$-scaling in heavy-ion collisions at SIS energies Meson $m_T$-scaling in heavy-ion collisions at SIS energies

1997-12-12

arxiv.org/abs/nucl-th/9712046v1

Phys.Lett. B424 (1998) 244-252

Physics

Nuclear Physics

Nuclear Theory

15 pages, LaTeX, including 4 postscript figures, UGI-97-29, submitted to Phys. Lett. B

Scientific paper

10.1016/S0370-2693(98)00213-5

We perform systematical studies on transverse-mass spectra of $\pi^0$, $\eta$, $\omega$, $\phi$, $K^+$ and $K^-$ mesons for C + C, Ni + Ni, Au + Au collisions at SIS energies within the HSD transport approach. We find that the $m_T$-spectra sensitively reflect the in-medium properties of the mesons. The 'bare mass' scenario leads to a general scaling behaviour for the meson $m_T$-spectra when including a mass shift due to the associate strangeness production threshold for kaons and antikaons whereas a 'dropping' mass scheme violates this $m_T$-scaling. The relative slope parameters, however, provide valuable information about the average meson potentials in the nuclear medium.

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