A measurement of R{sub c} using the SLD detector

Conference · Fri Jul 17 00:00:00 EDT 1998

OSTI ID:291054

SLD Collaboration

The authors report a new measurement of R{sub c} using data obtained with the SLD detector in 1993--1997. This measurement uses a double tag technique, where the selection of a c hemisphere is based on the reconstructed mass of the charm hadron decay vertex. The method uses the 3D vertexing capabilities of SLD's CCD vertex detectors and the small and stable SLC beams to obtain a high c-tagging efficiency and purity of 15% and 69%, respectively. They obtain a preliminary 93--97 result of R{sub c} = 0.1794 {+-} 0.0085{sub stat.} {+-} 0.0061{sub syst.}.

• Research Organization: Stanford Univ., Stanford Linear Accelerator Center, CA (US)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 291054
• Report Number(s): SLAC-PUB-7880; CONF-980748-; ON: DE98059252; TRN: US200305%%603
• Resource Relation: Conference: ICHEP '98: 29. international conference on high-energy physics, Vancouver, British Columbia (CA), 07/23/1998--07/30/1998; Other Information: Supercedes report DE98059252; PBD: 17 Jul 1998; PBD: 17 Jul 1998
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DECAY
EFFICIENCY
HADRONS
HIGH ENERGY PHYSICS