Observation of the Cabibbo-suppressed decay Xi(+)(c) -> pK(-)pi(+)


Jun S., Akchurin N., Andreev V., Atamantchouk A., Aykac M., Balatz M., ...Daha Fazla

PHYSICAL REVIEW LETTERS, cilt.84, ss.1857-1861, 2000 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 84 Konu: 9
  • Basım Tarihi: 2000
  • Doi Numarası: 10.1103/physrevlett.84.1857
  • Dergi Adı: PHYSICAL REVIEW LETTERS
  • Sayfa Sayıları: ss.1857-1861

Özet

We report the first observation of the Cabibbo-suppressed charm baryon decay Xi(c)(+) --> pK(-)pi(+) We observe 150 +/- 22 +/- 5 events for the signal. The data were accumulated using the SELEX spectrometer during the 1996-1997 fixed target run at Fermilab, chiefly from a 600 GeV/c Sigma(-) beam. The branching fractions of the decay relative to the Cabibbo-favored Xi(c)(+) --> Sigma(+)K(-)pi(+) and Xi(c)(+) --> Xi(-)pi(+)pi(+) are measured to be B(Xi(c)(+) --> pK(-)pi(+))/B(Xi(c)(+) --> Sigma(+)K(-)pi(+)) = 0.22 +/- 0.06 +/- 0.03 and B(Xi(c)(+) --> pK(-)pi(+))/B(Xi(c)(+) --> Xi(-)pi(+)pi(+)) = 0.20 +/- 0.04 +/- 0.02, respectively.