Measurement of the Branching Ratio of the Z0 into Heavy Quarks
- SLAC
We measure the hadronic branching ratios of the Z{sup 0} boson into heavy quarks: R{sub b} = {Lambda}{sub Z{sup 0}{yields}b{bar b}}/{Lambda}{sub Z{sup 0}{yields}hadrons} and R{sub c} = {Lambda}{sub Z{sup 0}{yields}c{bar c}}/{Lambda}{sub Z{sup 0}{yields}hadrons} using a multitag technique. The measurement was performed using about 400,000 hadronic Z{sup 0} events recorded in the SLC Large Detector experiment at SLAC between 1996 and 1998. The small and stable SLAC Linear Collider beam spot and the CCD-based vertex detector were used to reconstruct bottom and charm hadron decay vertices with high efficiency and purity, which enables us to measure most efficiencies from data. We obtain, R{sub b} = 0.21604 {+-} 0.00098(stat.) {+-} 0.00073(syst.) {-+} 0.00012(R{sub c}) and, R{sub c} = 0.1744 {+-} 0.0031(stat.) {+-} 0.0020(syst.) {-+} 0.0006(R{sub b}).
- Research Organization:
- Stanford Linear Accelerator Center (SLAC), Menlo Park, CA
- Sponsoring Organization:
- SC
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 839817
- Report Number(s):
- SLAC-PUB-9941
- Country of Publication:
- United States
- Language:
- English
Similar Records
Measurement of the branching ratios of the Z{sup 0} into heavy quarks
Heavy Flavor Decays of the Z0 and a Search for Flavor Changing Neutral Currents
A Measurement of the Branching Ratio R(B) = Gamma (Z(0) --> B Anti-B)/Gamma (Z(0) --> Hadrons) Using a Minimum Missing P(T) Corrected Mass Tag
Journal Article
·
Wed Jun 01 00:00:00 EDT 2005
· Physical Review. D, Particles Fields
·
OSTI ID:20709430
Heavy Flavor Decays of the Z0 and a Search for Flavor Changing Neutral Currents
Technical Report
·
Tue Jun 22 00:00:00 EDT 2004
·
OSTI ID:827017
A Measurement of the Branching Ratio R(B) = Gamma (Z(0) --> B Anti-B)/Gamma (Z(0) --> Hadrons) Using a Minimum Missing P(T) Corrected Mass Tag
Technical Report
·
Wed Dec 17 23:00:00 EST 2003
·
OSTI ID:826609