Evidence for Λc+ in inclusive pp → (Λ0π+π+π−) + X and pp → (K−π+p) + X at √s = 53 and 62 GeV Academic Article uri icon

abstract

  • A search for the charmed baryon, Λc+, has been carried out in inclusively, measured Λ0π±π+π- and K-π±p final states with longitudinal x > 0.75 in an experiment at the CERN intersecting storage rings. An effect with invariant mass near 2.3 GeV is observed in Λ0π+π+π- with cross section times branching ratio Bσ = (2.8±1.0) μb; similar effect is observed in K-π+p with Bσ = (2.3 ± 0.3) μb. The effect is seen only in the positive charge state, in agreement with an interpretation as Λc+. However, it is pointed out that in the same experiment, the non-charmed hyperon state Σ(1385)+ also has a cross section much larger than its corresponding negative charge state Σ(1385)-. © 1979.

author list (cited authors)

  • Lockman, W., Meyer, T., Rander, J., Schlein, P., Webb, R., Erhan, S., & Zsembery, J.

citation count

  • 68

publication date

  • August 1979