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Search for the pentaquark candidate Theta(1540)+ in the hyperon beam experiment WA89

Collaboration
Oct, 2005
5 pages
Published in:
  • Phys.Rev.C 72 (2005) 055201
e-Print:
DOI:
Experiments:
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reference search24 citations

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2004200720102013201602468
Abstract: (arXiv)
We report on a high-statistics search for the \t1540 resonance in Σ−\Sigma^--nucleus collisions at 340 \gevc1 . No evidence for this resonance was found in our data sample which contains 13 millions Ks0→π+π−K^0_s \to \pi^+\pi^- decays above background. For the decay channel Θ+→Ks0p\Theta^+ \to K^0_s p and the kinematic range xF>x_F> 0.05 we find the production cross section to be BR(Θ+→Ks0p)⋅σ0<BR(\Theta^+ \to K^0_s p)\cdot \sigma_0 < 1.8 μ\mub per nucleon at 99% CL.
  • 13.85.Rm
  • 25.80.Pw
  • Sigma nucleus: interaction
  • negative particle: secondary beam
  • pentaquark: search for
  • Theta(1540): hadronic decay
  • mass spectrum: (p K0(S))
  • mass spectrum: (pi+ pi-)
  • channel cross section: branching ratio
  • upper limit
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