Exotic particle searches with STAR at RHIC

Abstract

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 $\Lambda K_s^0$ 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.

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

References in corpus (1)

• Azimuthal anisotropy of K^0_S and Lambda production at mid-rapidity from Au+Au collisions at root s_NN = 130 GeV

Cited by in corpus (5)

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• SU(3) systematization of baryons
• Prediction of the masses and decay processes of strange, charmed and bottomed pentaquarks from the linear molecular crypto-heptaquark model
• Notes on exotic anti-decuplet of baryons