Evidence for an Anti-charmed Baryon State

Details Evidence for an Anti-charmed Baryon State Evidence for an Anti-charmed Baryon State

2005-06-30

arxiv.org/abs/hep-ex/0506077v1

Acta Phys.Polon. B36 (2005) 2283-2292

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, 8 figures, conference proceedings for the Cracow Epiphany Conference on Hadron Spectroscopy 2005

Scientific paper

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 $uudd\bar c$, together with the charge conjugate.

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