Speaker
Mr
Ryuma Hori
(KEK)
Description
A search for a narrow baryonic state in the pKS0 and \bar{p}KS0 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 (DIS) events at an ep
centre-of-mass energy of 318 GeV for exchanged photon virtuality, Q2,
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 1995–2000, no resonance peak is found in the p(\bar{p})KS0
invariant-mass distribution in the range 1.45–1.7 GeV. Upper limits on
the production cross section are set for different assumptions on the
width of the resonance.
Primary authors
Matthew Wing
(UCL)
Mr
Ryuma Hori
(KEK)
