Investigation of the total charm-pair cross section in nonresonant e/sup +/e/sup -/ annihilations at. sqrt. s = 10. 5 GeV

Journal Article · Tue Nov 01 04:00:00 EST 1988 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.38.2679· OSTI ID:6752070

Bowcock, T; Kinoshita, K; Pipkin, F M; Procario, M; Wilson, R; Wolinski, J; Xiao, D; Haas, P; Hempstead, M; Jensen, T; others, and

We report results from two new methods for measuring the total production of charmed particles in nonresonant e/sup +/e/sup -/ annihilations at ..sqrt..s = 10.5 GeV. The rate for detection of events containing two reconstructed charmed mesons relative to that for events containing one is used to extract information about total charm production independent of decay branching fractions. The value of ..delta..R/sub c//sub c-bar/, the total charm-pair cross section normalized to the pointlike ..mu..-pair cross section, is found to be 1.13/sub -0.13//sup +0.17/ +- 0.09, under an assumption of limited particle correlations. In an independent analysis the inclusive cross section for e/sup +/e/sup -/..-->..qq-bar..-->..e/sup +- /X is measured to be 0.293 +- 0.017 +- 0.017 nb. Using measured relative production rates and semileptonic branching fractions of D/sup 0/ and D/sup +/ mesons and estimates of these quantities for D/sub s/ and ..lambda../sub c/, this is found to correspond to ..delta..R/sub c//sub c-bar/ = 2.07 +- 0.12 +- 0.26. These two measurements are discussed in the context of measurements made by reconstruction of exclusive hadronic decay modes and of theoretical expectations.

• Research Organization: Harvard University, Cambridge, Massachusetts 02138
• OSTI ID: 6752070
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 38:9; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CHARM PARTICLES
CROSS SECTIONS
DATA
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
GEV RANGE
GEV RANGE 10-100
HADRONS
INFORMATION
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MESONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE PRODUCTION