Evidence for an Anti-charmed Baryon State

2005/06/30 by Christiane Risler
Physics and Astronomy · #hep-ex

paper · pdf

published as Acta Phys.Polon. B36 (2005) 2283-2292 · 10 pages, 8 figures, conference proceedings for the Cracow Epiphany Conference on Hadron Spectroscopy 2005

arxiv created 2005/06/30 · arxiv updated 2009/12/01

Abstract

We report on the observation of a narrow resonance in D^*-p and D^*+ pbar invariant mass combinations in deep-inelastic ep scattering at centre-of-mass energies of 300 and 320 GeV at HERA. The mass of the resonance is measured to be 3099 +- 3 (stat.) +- 5 (syst.) MeV, the Gaussian width of 12 +- 3 (stat.) MeV is compatible with the experimental resolution. The state can be interpreted as an anti-charmed baryon with minimal constituent quark composition uudd c, together with the charge conjugate.

Related

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• Observation of a narrow baryonic state in DIS at HERA
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• Molecular Structures in Hidden Charm Meson and Charmed Baryon Spectrum