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Kaon versus Antikaon Production at SIS Energies | W. Cassing
; E. L. Bratkovskaya
; U. Mosel
; S. Teis
; A. Sibirtsev
; | Date: |
23 Sep 1996 | Journal: | Nucl.Phys. A614 (1997) 415-432 | Subject: | nucl-th | Affiliation: | Giessen Univ. | Abstract: | We analyse the production and propagation of kaons and antikaons in Ni + Ni reactions from 0.8--1.85 GeV/u within a coupled channel transport approach including the channels $BB o K^+YN, pi B o K^+Y, BB o NN K ar{K}, pi B o N Kar{K}, K^+B o K^+B, ar{K} B o ar{K}B, Y N o ar{K} NN, pi pi o K ar{K}$ as well as $pi Y o ar{K}N$ and $ar{K} N o pi Y$ for the antikaon absorption. Whereas the experimental $K^+$ spectra can be reproduced without introducing any selfenergies for the mesons in Ni + Ni collisions from 0.8 to 1.8 GeV/u, the $K^-$ yield is underestimated by a factor of 5--7 at 1.66 and 1.85 GeV/u. However, introducing density dependent antikaon masses as proposed by Kaplan and Nelson, the antikaon spectra can be reasonably well described. | Source: | arXiv, nucl-th/9609050 | Services: | Forum | Review | PDF | Favorites |
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