Charm Production in 400-{GeV}/cc Proton Emulsion Interactions

Jan, 1982
17 pages
Published in:
  • Nucl.Phys.B 199 (1982) 424-440
  • Published: 1982
Report number:
  • TIFR-BC-82-1
Experiments:

Citations per year

198219912000200920170246810
Abstract: (Elsevier)
5032 proton-emulsion interactions at 400 GeV/ c momentum have been carefully scrutinized for production and decay of charged charm particles. In order to detect these decays, shower tracks from 3056 stars have been followed to a maximum length of 1 mm and those from 1976 stars up to 2 mm. A total of 23 three-prong charm-like candidates have been recorded in the forward cone. The background due to γ-overlap on a shower track, trident/pseudo-trident production and secondary interactions is estimated to be 15. Attributing the signal of 8 events to Λ c + and assuming the branching ratio of Λ c + → 3 prong to be 0.6 and τ Λ c to be 10 −13 sec we obtain the production cross section to be 106±39 μ b/nucleon. Out of these 8 events one example of semileptonic decay of Λ c + is seen.
  • P NUCLEUS: INCLUSIVE REACTION
  • LAMBDA/C(2260): HADROPRODUCTION
  • HADROPRODUCTION: LAMBDA/C(2260)
  • LAMBDA/C(2260): POSITIVE PARTICLE
  • LAMBDA/C(2260): LIFETIME
  • LAMBDA/C(2260): SEMILEPTONIC DECAY
  • SEMILEPTONIC DECAY: LAMBDA/C(2260)
  • CHANNEL CROSS SECTION
  • FINAL STATE: (3PARTICLE)
  • (3PARTICLE): FINAL STATE
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