Baryon and Antibaryon Production in Hadronic and Nuclear Interactions

Details Baryon and Antibaryon Production in Hadronic and Nuclear Interactions Baryon and Antibaryon Production in Hadronic and Nuclear Interactions

1999-02-03

arxiv.org/abs/hep-ph/9902232v1

Phys.Lett. B459 (1999) 27-32

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 4 postscript figures

Scientific paper

10.1016/S0370-2693(99)00664-4

We introduce a new formulation of the diquark breaking mechanism which describes with no free parameters the huge nuclear stopping observed in central nucleus-nucleus collisions. Supplemented, in the dual parton model, with strings originating from diquark--antidiquark pairs from the nucleon sea, it gives a substantial increase of hyperon and antihyperon yields from $pPb$ to central $PbPb$ collisions. Compared to data, this increase is slightly underestimated for $\Lambda$'s and $\Xi$'s but is five times too small for $\Omega$'s. Introducing final state interactions, a reasonable description of all baryon and antibaryon yields is achieved.

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