High Statistics Search for the Theta+(1.54) Pentaquark State
M.J. Longo, R.A. Burnstein, A. Chakravorty, Y.C. Chen, W.S.Choong, K., Clark, E.C. Dukes, C. Durandet, J. Felix, Y. Fu, G. Gidal, H.R. Gustafson, T., Holmstrom, M. Huang, C. James, C.M. Jenkins, T. Jones, D.M. Kaplan, L.M., Lederman, N. Leros, F. Lopez, L.C. Lu, W. Luebke
TL;DR
This study conducted a high-statistics search for the Theta+(1.54) pentaquark in Fermilab data but found no evidence of its existence, setting a stringent upper limit on its production rate.
Contribution
It provides the first high-statistics search for Theta+(1.54) and establishes a new upper limit on its production in proton interactions.
Findings
No evidence of Theta+(1.54) observed
Upper limit of <0.3% on Theta+ production
Data from 1999 HyperCP experiment used
Abstract
We have searched for Theta+(1.54) -> K0,p decays using data from the 1999 run of the HyperCP experiment at Fermilab. We see no evidence for a narrow peak in the K0,p mass distribution near 1.54 GeV/c among 106,000 K0,p candidates, and obtain an upper limit for the fraction of Theta+(1.54) to K0,p candidates of <0.3% at 90% confidence.
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