Search for a narrow baryonic resonance decaying to K s 0 p or K s 0 over(p, ̄) in deep inelastic scattering at HERA

A search for a narrow baryonic resonance decaying to K s 0 p or K s 0 over(p, ̄) is carried out in deep inelastic ep scattering with the H1 detector at HERA. Such a resonance could be a strange pentaquark Θ +, evidence for which has been reported by several experiments. The K s 0 p and K s 0 over(p, ̄) invariant mass distributions presented here do not show any significant peak in the mass range from threshold up to 1.7 GeV. Mass dependent upper limits on σ (e p → e Θ + X) × BR (Θ + → K 0 p) are obtained at the 95% confidence level. © 2006.0SCOPUS: ar.jH1 Collaboration.