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Observation of charmed-baryon production in e+e- annihilation

  • Author(s): Abrams, GS
  • Alam, MS
  • Blocker, CA
  • Boyarski, AM
  • Breidenbach, M
  • Burke, DL
  • Carithers, WC
  • Chinowsky, W
  • Coles, MW
  • Cooper, S
  • Dieterle, WE
  • Dillon, JB
  • Dorenbosch, J
  • Dorfan, JM
  • Eaton, MW
  • Feldman, GJ
  • Franklin, MEB
  • Gidal, G
  • Goldhaber, G
  • Hanson, G
  • Hayes, KG
  • Himel, T
  • Hitlin, DG
  • Hollebeek, RJ
  • Innes, WR
  • Jaros, JA
  • Jenni, P
  • Johnson, AD
  • Kadyk, JA
  • Lnakford, AJ
  • Larsen, RR
  • Longo, MJ
  • Lth, V
  • Millikan, RE
  • Nelson, ME
  • Pang, CY
  • Patrick, JF
  • Perl, ML
  • Richter, B
  • Roussarie, A
  • Russell, JJ
  • Scharre, DL
  • Schindler, RH
  • Schwitters, RF
  • Siegrist, JL
  • Strait, J
  • Taureg, H
  • Tonutti, M
  • et al.
Abstract

A peak in the pK-+ and p»K+- invariant-mass spectra at 2.2850.006 GeV/c2 is observed, which is associated with the lowest-lying charmed baryon (c). A cross section times branching ratio of 0.0370.012 nb at Ec.m.=5.2 GeV is measured with a substantial fraction of the events produced with an equal recoiling mass. New measurements of inclusive p and cross sections are also presented, allowing an estimate of the branching ratio B(c+pK-+)=0.0220.010. © 1980 The American Physical Society.

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