2000/04/03 by D. E. Jaffe, G. Masek, H. P. Paar +97 · 11 citations
Physics and Astronomy · #Antiproton #Branching fraction #Charm (quantum number) #Electron #High-Energy Particle Collisions Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Yield (engineering) #hep-ex
paper · pdf · doi:10.1103/physrevd.62.072005
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 62(7) (American Physical Society)
arxiv created 2000/04/03 · openalex publication_date 2000/09/01 · arxiv updated 2010/04/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The \ensuremathΛc+\ensuremath→pK^\ensuremath-\ensuremathπ+ 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^\ensuremath-\ensuremath→DpX), 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^\ensuremath-\ensuremath→Dp\ensuremathΛc+X events, the \ensuremathΛc+\ensuremath→pK^\ensuremath-\ensuremathπ+ branching fraction can be determined by measuring the pK^\ensuremath-\ensuremathπ+ yield in the same hemisphere as the antiprotons in our DpX sample. Three types of D charm tags are used, \ensuremathπsoft^\ensuremath- (from D^*\ensuremath-\ensuremath→D0\ensuremathπsoft^\ensuremath-), electrons (from D\ensuremath→Xe^\ensuremath-\ensuremathν), and fully reconstructed D0\ensuremath→K+\ensuremathπ^\ensuremath- or D^\ensuremath-\ensuremath→K+\ensuremathπ^\ensuremath-\ensuremathπ^\ensuremath- or Ds^\ensuremath-\ensuremath→\ensuremathφ\ensuremathπ^\ensuremath-. Combining our results obtained from the three independent charm tags, we obtain B(\ensuremathΛc+\ensuremath→pK^\ensuremath-\ensuremathπ+)=(5.0\ifmmode±\else\textpm\fi0.5\ifmmode±\else\textpm\fi1.2)%.