Anti-Lambda/Anti-Proton ratios at the AGS

Details Anti-Lambda/Anti-Proton ratios at the AGS Anti-Lambda/Anti-Proton ratios at the AGS

1998-06-02

arxiv.org/abs/nucl-th/9806006v1

Physics

Nuclear Physics

Nuclear Theory

8 pages revtex, 4 postscript figures

Scientific paper

We attempt to explain the large ${\bar \Lambda}/\bar p$ ratios measured in heavy ion collisions at $12~{\rm A\cdot GeV}/c$ beam momentum within an hadronic framework. The ratios are large compared to corresponding ratios in $pp$ collisions, and to thermal fits. We show using a simple model and a detailed cascade calculation that different annihilation cross--sections of $\bar \Lambda$'s and $\bar p$'s, and the net conversion of $\bar p$'s to $\bar \Lambda$'s, do not account for the enhancement. Uncertainties in elementary cross--sections and formation times are also considered.

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