Prompt electron production from the DELCO detector at the SLAC storage ring PEP

Journal Article · Thu May 01 04:00:00 EDT 1986 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.33.2708· OSTI ID:5797008

Pal, T; Atwood, W B; Barish, B C; Bonneaud, G R; Courau, A; Donaldson, G J; Dubois, R; Duro, M M; Elsen, E E; Gao, S G

We report final results on prompt electron production in hadronic events from e/sup +/e/sup -/ annihilations at ..sqrt..s = 29 GeV, obtained with the DELCO detector at the SLAC storage ring PEP. We find the semielectronic branching ratios of charm and bottom quarks to be B(c..-->..se/sup +/..nu../sub e/) = (11.6/sub -0.9/ /sup +1.1/)% and B(b..-->..ce/sup -/nu-bar/sub e/) = (14.9/sub -1.9/ /sup +2.2/)% respectively. These results, from the complete data set, are consistent with an earlier analysis of partial data and indicate hard fragmentation functions for both c and b quarks, with mean values = 0.59 +- 0.04 and = 0.72 +- 0.05. The errors indicated here are a combination of statistical and systematic uncertainties.

• Research Organization: California Institute of Technology, Pasadena, California 91125
• DOE Contract Number: AC03-81ER40050; AC03-76SF00515
• OSTI ID: 5797008
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 33:9; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645102 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
B MESONS
BASIC INTERACTIONS
BOSONS
BRANCHING RATIO
CHARM PARTICLES
CHERENKOV COUNTERS
DECAY
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FRAGMENTATION
GEV RANGE
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
LIFETIME
LINEAR MOMENTUM
MEASURING INSTRUMENTS
MESONS
MONTE CARLO METHOD
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PEP STORAGE RINGS
POSTULATED PARTICLES
PROMPT ELECTRONS
PSEUDOSCALAR MESONS
QUARKS
RADIATION DETECTORS
SEMILEPTONIC DECAY
STORAGE RINGS
TRANSVERSE MOMENTUM
WEAK PARTICLE DECAY