Measurement of B(Λ+c-->pK-π+)
Abstract
The Λ+c-->pK-π+ yield has been measured in a sample of two-jet continuum events containing both a charm tag (``D¯'') as well as an antiproton (e+e--->D¯p¯X), with the antiproton in the hemisphere opposite the D¯ (measurement of charge conjugate modes is implicit throughout). Under the hypothesis that such selection criteria tag e+e--->D¯p¯Λ+cX events, the Λ+c-->pK-π+ branching fraction can be determined by measuring the pK-π+ yield in the same hemisphere as the antiprotons in our D¯p¯X sample. Three types of D¯ charm tags are used, π-soft (from D*--->D¯0π-soft), electrons (from D¯-->Xe-ν), and fully reconstructed D¯0-->K+π- or D--->K+π-π- or D-s-->φπ-. Combining our results obtained from the three independent charm tags, we obtain B(Λ+c-->pK-π+)=(5.0+/-0.5+/-1.2)%.
- Publication:
-
Physical Review D
- Pub Date:
- October 2000
- DOI:
- 10.1103/PhysRevD.62.072005
- arXiv:
- arXiv:hep-ex/0004001
- Bibcode:
- 2000PhRvD..62g2005J
- Keywords:
-
- 13.30.Eg;
- 14.20.Lq;
- Hadronic decays;
- Charmed baryons;
- High Energy Physics - Experiment
- E-Print:
- Phys.Rev.D62:072005,2000