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Search for a narrow baryonic state decaying to and in deep inelastic scattering at HERA
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文摘
A search for a narrow baryonic state in the View the MathML source and View the MathML source system has been performed in ep   collisions at HERA with the ZEUS detector using an integrated luminosity of View the MathML source taken in 2003–2007. The search was performed with deep inelastic scattering events at an ep   centre-of-mass energy of View the MathML source for exchanged photon virtuality, Q2, between 20 and View the MathML source. Contrary to evidence presented for such a state around 1.52 GeV in a previous ZEUS analysis using a sample of 121 pb−1 taken in 1996–2000, no resonance peak was found in the View the MathML source invariant-mass distribution in the range 1.45–1.7 GeV. Upper limits on the production cross section are set.

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