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Updated: Aug 15, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Search for exotic baryons in 800 GeV pp-->pXi+/-piX reactions
D C Christian1, J Felix, E E Gottschalk
1Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
Abstract:
We report the results of a high-statistics, sensitive search for narrow baryon resonances decaying to Xi-pi-, Xi-pi+, Xi+pi-, and Xi+pi+. The only resonances observed are the well known Xi0(1530) and Xi0(1530). No evidence is found for the states near 1862 MeV, previously reported by NA49 [Phys. Rev. Lett. 92, 042003 (2003)]. At the 95% confidence level, we find the upper limit for the production of a Gaussian enhancement with sigma=7.6 MeV in the Xi-pi- effective mass spectrum to be 0.3% of the number of observed Xi0(1530)-->Xi-pi+. We find similarly restrictive upper limits for an enhancement at 1862 MeV in the Xi-pi+, Xi+pi-, and Xi+pi+ mass spectra.
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