Evidence for a narrow anti-charmed Baryon state H1.

H1 Collaboration, The and Henderson, Rob C. W. and Sloan, T. and Aktas, A. (2004) Evidence for a narrow anti-charmed Baryon state H1. Physics Letters B, 588 (1-2). pp. 17-28. ISSN 0370-2693

Abstract

A narrow resonance in D*−p and invariant mass combinations is observed in inelastic electron–proton collisions at centre-of-mass energies of 300 GeV and 320 GeV at HERA. The resonance has a mass of 3099±3(stat.)±5(syst.) MeV and a measured Gaussian width of 12±3(stat.) MeV, compatible with the experimental resolution. The resonance is interpreted as an anti-charmed baryon with a minimal constituent quark composition of , together with the charge conjugate.