Measurement of B(Λc+→pK-π+)

Measurement of B(Λc+→pK-π+)

The Λc+→pK-π+ yield has been measured in a sample of two-jet continuum events containing both a charm tag ("D̄") as well as an antiproton (e+e-→D̄p̄X), with the antiproton in the hemisphere opposite the D̄ (measurement of charge conjugate modes is implicit throughout). Under the hypothesis...

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Bibliographic Details
Main Authors: Jaffe, D, Masek, G, Paar, H, Potter, E, Prell, S, Sharma, V, Asner, D, Eppich, A, Gronberg, J, Hill, T, Lange, D, Morrison, R, Briere, R, Behrens, B, Ford, W, Gritsan, A, Roy, J, Smith, J, Alexander, J, Baker, R, Bebek, C, Berger, B, Berkelman, K, Blanc, F, Boisvert, V
Format: Journal article
Language:English
Published: 2000
Description
Summary:The Λc+→pK-π+ yield has been measured in a sample of two-jet continuum events containing both a charm tag ("D̄") as well as an antiproton (e+e-→D̄p̄X), with the antiproton in the hemisphere opposite the D̄ (measurement of charge conjugate modes is implicit throughout). Under the hypothesis that such selection criteria tag e+e-→D̄p̄Λc+X events, the Λc+→pK-π+ branching fraction can be determined by measuring the pK-π+ yield in the same hemisphere as the antiprotons in our D̄p̄X sample. Three types of D charm tags are used, πsoft- (from D*-→D̄0πsoft-), electrons (from D̄→Xe-v), and fully reconstructed D̄0→K+π- or D- →K+π-π- or Ds-→φπ-. Combining our results obtained from the three independent charm tags, we obtain B(Λc+→pK-π +)=(5.0±0.5±1.2)%. ©2000 The American Physical Society.

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