An improved inclusive measurement of A{sub c} using the SLD detector

Conference · Mon Jul 20 00:00:00 EDT 1998

OSTI ID:291059

SLD Collaboration

The authors report a new measurement of A{sub c} using data obtained by SLD in 1993--97. This measurement uses a vertex 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 detector and the small and stable SLC beams to obtain a high c-event tagging efficiency and purity of 28% and 81%, respectively. Charged kaons identified by the CRID detector and the charge of the reconstructed vertex provide an efficient quark-antiquark tag. They obtain a preliminary result of A{sub c} = 0.650 {+-} 0.041 {+-} 0.033.

• 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: 291059
• Report Number(s): SLAC-PUB-7879; CONF-980748-; ON: DE98059251; TRN: US200305%%608
• 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 DE98059251; PBD: 20 Jul 1998; PBD: 20 Jul 1998
• Country of Publication: United States
• Language: English

Related Subjects

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