Search for pentaquarks decaying to Xi-pi in deep inelastic scattering at HERA - INSPIRE

DataBETA

Search for pentaquarks decaying to Xi-pi in deep inelastic scattering at HERA

ZEUS

Collaboration

•

S. Chekanov
(
- Argonne
)

Jan, 2005

12 pages

Published in:

Phys.Lett.B 610 (2005) 212-224

e-Print:

hep-ex/0501069 [hep-ex]

DOI:

10.1016/j.physletb.2005.02.016

Report number:

DESY-05-018

Experiments:

DESY-HERA-ZEUS

View in:

reference search44 citations

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Abstract: (Elsevier)

A search for pentaquarks decaying to Ξ−π− ( Ξ−π+ ) and corresponding antiparticles has been performed with the ZEUS detector at HERA. The data sample consists of deep inelastic ep scattering events at centre-of-mass energies of 300 and 318 GeV, and corresponds to 121 pb −1 of integrated luminosity. A clear signal for Ξ0(1530)→Ξ−π+ was observed. However, no signal for any new baryonic state was observed at higher masses in either the Ξ−π− or Ξ−π+ channels. The searches in the antiparticle channels were also negative. Upper limits on the ratio of a possible Ξ3/2−− ( Ξ3/20 ) signal to the Ξ0(1530) signal were set in the mass range 1650–2350 MeV.

Note:

12 pages, 4 figures, submitted to Phys. Lett. B

electron p: colliding beams
pentaquark: search for
pentaquark: hadronic decay
mass spectrum: (Xi- pi-)
mass spectrum: (Xi- pi+)
Xi(1530): electroproduction
channel cross section: ratio
upper limit
ZEUS
experimental results

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Figures(0)

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