Exotic particle searches with STAR at RHIC

Details Exotic particle searches with STAR at RHIC Exotic particle searches with STAR at RHIC

2004-06-11

arxiv.org/abs/hep-ex/0406032v1

Acta Phys.Hung. A24 (2005) 321-328

Physics

High Energy Physics

High Energy Physics - Experiment

To appear in the proceedings of the 20th Winter Workshop on Nuclear Dynamics, 15-20 March 2004, Jamaica

Scientific paper

10.1556/APH.24.2005.1-4.44

We present preliminary results of the STAR experiment at RHIC on exotic particle searches in minimum bias Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. We observe a narrow peak at 1734 $\pm$ 0.5 $\pm$ 5 MeV in the $\Lambda K^0_s$ invariant mass with width consistent with the experimental resolution of about 6 MeV within the errors. The statistical significance can be quantified between 3 and 6 $\sigma$ depending on cuts and methods. If this peak corresponds to a real particle state it would be a candidate for the $N^0$ or the $\Xi^0$ I=1/2 pentaquark states.

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