A search for a narrow baryonic state in the pK(S)(0) and (p) over barK(S)(0) system has been performed in ep collisions at HERA with the ZEUS detector using an integrated luminosity of 358 pb(-1) taken in 2003-2007. The search was performed with deep inelastic scattering events at an ep centre-of-mass energy of 318 GeV for exchanged photon virtuality, Q(2), between 20 and 100 GeV2. 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 p((p) over bar )K-S(0) invariant-mass distribution in the range 1.45-1.7 GeV. Upper limits on the production cross section are set.

Search for a narrow baryonic state decaying to pKS0 and pKS0 in deep inelastic scattering at HERA

BERTOLIN, ALESSANDRO;BRUGNERA, RICCARDO;DUSINI, STEFANO;GARFAGNINI, ALBERTO;LIMENTANI, SILVIA;LONGHIN, ANDREA;STANCO, LUCA;
2016

Abstract

A search for a narrow baryonic state in the pK(S)(0) and (p) over barK(S)(0) system has been performed in ep collisions at HERA with the ZEUS detector using an integrated luminosity of 358 pb(-1) taken in 2003-2007. The search was performed with deep inelastic scattering events at an ep centre-of-mass energy of 318 GeV for exchanged photon virtuality, Q(2), between 20 and 100 GeV2. 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 p((p) over bar )K-S(0) invariant-mass distribution in the range 1.45-1.7 GeV. Upper limits on the production cross section are set.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11577/3221732
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