Measurement of B({lambda}{sub c}{sup +}{yields}pK{sup -}{pi}{sup +})

Journal Article · Sun Oct 01 00:00:00 EDT 2000 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.62.072005· OSTI ID:20217723

Jaffe, D E ^[1]; Masek, G ^[1]; Paar, H P ^[1]; Potter, E M ^[1]; Prell, S ^[1]; Sharma, V ^[1]; Asner, D M ^[2]; Eppich, A ^[2]; Gronberg, J ^[2]; Hill, T S ^[2]

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1. University of California, San Diego, La Jolla, California 92093 (United States)
2. University of California, Santa Barbara, Santa Barbara, California 93106 (United States)

The {lambda}{sub c}{sup +}{yields}pK{sup -}{pi}{sup +} yield has been measured in a sample of two-jet continuum events containing both a charm tag (''D(bar sign)'') as well as an antiproton (e{sup +}e{sup -}{yields}D(bar sign)p(bar sign)X), with the antiproton in the hemisphere opposite the D(bar sign) (measurement of charge conjugate modes is implicit throughout). Under the hypothesis that such selection criteria tag e{sup +}e{sup -}{yields}D(bar sign)p(bar sign){lambda}{sub c}{sup +}X events, the {lambda}{sub c}{sup +}{yields}pK{sup -}{pi}{sup +} branching fraction can be determined by measuring the pK{sup -}{pi}{sup +} yield in the same hemisphere as the antiprotons in our D(bar sign)p(bar sign)X sample. Three types of D(bar sign) charm tags are used, {pi}{sub soft}{sup -} (from D{sup *-}{yields}D(bar sign){sup 0}{pi}{sub soft}{sup -}), electrons (from D(bar sign){yields}Xe{sup -}{nu}), and fully reconstructed D(bar sign){sup 0}{yields}K{sup +}{pi}{sup -} or D{sup -}{yields}K{sup +}{pi}{sup -}{pi}{sup -} or D{sub s}{sup -}{yields}{phi}{pi}{sup -}. Combining our results obtained from the three independent charm tags, we obtain B({lambda}{sub c}{sup +}{yields}pK{sup -}{pi}{sup +})=(5.0{+-}0.5{+-}1.2)%. (c) 2000 The American Physical Society.

• OSTI ID: 20217723
• Journal Information: Physical Review. D, Particles Fields, Vol. 62, Issue 7; Other Information: PBD: 1 Oct 2000; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
LAMBDA C PLUS BARYONS
HADRONIC PARTICLE DECAY
ELECTRON-POSITRON INTERACTIONS
BRANCHING RATIO
CHARMED BARYONS
EXPERIMENTAL DATA