Search for a narrow baryonic state decaying to ${pK^0_S}$ and ${\bar{p}K^0_S}$ in deep inelastic scattering at HERA

Abramowicz, H.; Abt, I.; Adamczyk, L.; Adamus, M.; Antonelli, S.; Aushev, V.; Behnke, O.; Behrens, U.; Bertolin, A.; Bhadra, S.

doi:10.1016/j.physletb.2016.06.001

Search for a narrow baryonic state decaying to ${pK^0_S}$ and ${\bar{p}K^0_S}$ in deep inelastic scattering at HERA

ZEUS

Collaboration

•

H. Abramowicz
(
- Tel Aviv U. and
- Munich, Max Planck Inst.
)

Apr 7, 2016

8 pages

Published in:

Phys.Lett.B 759 (2016) 446-453

Published: Aug 10, 2016

e-Print:

1604.02220 [hep-ex]

DOI:

10.1016/j.physletb.2016.06.001

Report number:

DESY-16-065

Experiments:

DESY-HERA-ZEUS

View in:

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Abstract: (Elsevier)

A search for a narrow baryonic state in the pKS0 and p‾KS0 system has been performed in ep collisions at HERA with the ZEUS detector using an integrated luminosity of 358pb−1 taken in 2003–2007. The search was performed with deep inelastic scattering events at an ep centre-of-mass energy of 318GeV for exchanged photon virtuality, Q2 , between 20 and 100GeV2 . 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‾)KS0 invariant-mass distribution in the range 1.45–1.7 GeV. Upper limits on the production cross section are set.

Note:

16 pages, 4 figures, accepted by Phys. Lett. B. Minor changes from journal reviewing process, including a small correction to figure 4

electron p: scattering
p: particle identification
deep inelastic scattering
DESY HERA Stor
ZEUS
photon
photoproduction
experimental results

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