Observation of charmed baryon production in νp interactions in BEBC |
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| Authors: | H Grässler D Lanske R Schulte HH Seyfert K Böckmann C Geich-Gimbel T Kokott B Nellen R Pech H Saarikko P Bosetti VT Cocconi DC Cundy A Grant PO Hulth H Klein DRO Morrison B Saitta |
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| Institution: | III. Physikalisches Institut der Technischen Hochschule, Aachen, Germany;Physikalisches Institut der Universität Bonn, Bonn, Germany;CERN, European Organization for Nuclear Research, Geneva, Switzerland |
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| Abstract: | Two examples of charmed baryon production by neutrinos have been observed in BEBC filled with hydrogen. Both events fit uniquely the reaction νp → μ?pK?π+π+ and thus apparently violate the ΔS = ΔQ rule. None of the appropriate mass combinations is consistent with the mass values of the D0 and D+ mesons. However, for the mass combinations of the pK?π+ systems, values of (2.285 ± 0.005) GeV and (2.280 ± 0.003) GeV are found for event 1 and 2, respectively. These values agree with the mass of (2.285 ± 0.006) GeV for the Λc+ charmed baryon determined recently in e+e? collisions at SLAC. |
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| Keywords: | Aachen-Bonn-CERN-Munich (MPI)-Oxford Collaboration |
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