Observation of the Cabibbo suppressed decay Xi(c)+ ---&gt; p K- pi+

Jun, S. Y.

doi:10.1103/PhysRevLett.84.1857

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

Journal Article · Thu Jul 01 04:00:00 EDT 1999 · Phys.Rev.Lett.

DOI:https://doi.org/10.1103/PhysRevLett.84.1857· OSTI ID:1893488

Jun, S. Y.

We report the first observation of the Cabibbo-suppressed charm baryon decay Xi_c+ -> p K- pi+. We observe 150 +- 22 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+ -> X- pi+ pi+ are measured to be B(Xi_c+ -> p K- pi+)/B(Xi_c+ -> Sigma+ K- pi+) = 0.22 +- 0.06 +- 0.03 and B(Xi_c+ -> p K- pi+)/B(Xi_c+ -> X- pi+ pi+) = 0.20 +- 0.04 +- 0.02, respectively.

Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Contributing Organization:: SELEX

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 1893488

Report Number(s):: FERMILAB-PUB-99-217-E; arXiv:hep-ex/9907062; oai:inspirehep.net:504735

Journal Information:: Phys.Rev.Lett., Journal Name: Phys.Rev.Lett. Vol. 84

Country of Publication:: United States

Language:: English

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