Xi- and Xi+ production in central Pb+Pb collisions at 158 GeV/c per nucleon

  • Results of the production of Xi and Xi-bar hyperons in central Pb+Pb interactions at 158 GeV/c per nucleon are presented. This analysis utilises a global reconstruction procedure, which allows a measurement of 4pi integrated yields to be made for the first time. Inverse slope paramters, which are determined from an exponential fit to the transverse mass spectra, are shown. Central rapidity densities are found to be 1.49 +- 0.08 and 0.33 +- 0.04 per event per unit of rapidity for Xi and Xi-bar respectively. Yields integrated to full phase space are 4.12 +- 0.02 and 0.77 +- 0.04 for Xi and Xi-bar. The ratio of Xi-bar/Xi at mid-rapidity is 0.22 +- 0.03.

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Author:Sergey V. AfanasievORCiDGND, NA49 Collaboration
ArXiv Id:http://arxiv.org/abs/hep-ex/0202037
Document Type:Preprint
Date of Publication (online):2005/09/27
Year of first Publication:2002
Publishing Institution:Universit├Ątsbibliothek Johann Christian Senckenberg
Release Date:2005/09/27
Nebent.: Cascade and anti-cascade production in central Pb+Pb collisions at 158 GeV/c per nucleon
Source:Phys.Lett. B538 (2002), http://arxiv.org/abs/hep-ex/0202037
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht