Charm production in ep interaction at HERA and evidence for a narrow anti-charmed baryon state at H1

Details Charm production in ep interaction at HERA and evidence for a narrow anti-charmed baryon state at H1 Charm production in ep interaction at HERA and evidence for a narrow anti-charmed baryon state at H1

2004-05-18

arxiv.org/abs/hep-ex/0405051v1

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, 7 figures, the XXXIXth Rencontres de Moriond, QCD and Hadronic Interaction 2004

Scientific paper

Recent results on open charm production at HERA are presented. Charm quarks are identified via the reconstruction of D-mesons. The charm contribution to the proton structure function is shown. Evidence for an exotic anti-charmed baryon state observed by H1 is presented. The data show a narrow resonance in the D*p invariant mass combination at 3099+-3(stat)+-5(syst) MeV. The resonance is interpreted as an anti-charmed baryon with minimal constituent quark content uuddcbar together with its charge conjugate. Such a signal is not observed in a similar preliminary ZEUS analysis.

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