A Preliminary Inclusive Measurement of Ac Using the SLD Detector

Technical Report · Thu Jan 29 00:00:00 EST 2004

DOI:https://doi.org/10.2172/826628· OSTI ID:826628

Abe, K

We report a new measurement of A{sub c} using data obtained by SLD in 1993-1995. 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 hemisphere c-tagging efficiency and purity of 13% and 69%, respectively. Charged kaons identified by the CRID detector and the charge of the reconstructed vertex provide an efficient quark-antiquark tag. We obtain a preliminary 93-95 result of A{sub c} = 0.662 {+-} 0.068 {+-} 0.042.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 826628
• Report Number(s): SLAC-PUB-7595; TRN: US0403484
• Resource Relation: Other Information: PBD: 29 Jan 2004
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DECAY
EFFICIENCY
HADRONS
KAONS