Heavy quark production at SLC and LEP
Conference
·
OSTI ID:6483096
Experiments at SLC and LEP have made preliminary measurements of the relative partial widths of the c and b quarks. Using D* tagging, DELPHI has found R{sub c}{bar c}{triple bond}/{Gamma}{sub c}{bar c}/{Gamma}{sub hadr.} = 0.162 {plus minus} 0.032 {plus minus} 0.031, in good agreement with the Standard Model value of 0.171. ALEPH has used semileptonic decays of charm to obtain 0.148 {plus minus} 0.044 {sub {minus}0.038}{sup +0.045}. Three experiments have used semileptonic {Beta} decays to measurement R{sub b}{bar b}: R{sub b}{bar b} = 0.23 {plus minus} 0.10 (Mark II), 0.218 {plus minus} 0.010 {plus minus} 0.021 (L3), and 0.220 {plus minus} 0.016 {plus minus} 0.024 (ALEPH). All agree well with the expected value of 0.217. The uncertainty in branching ratios of c and b hadrons is the largest systematic error in all of the results. Future LEP measurements of the branching ratios may reduce the errors. R{sub b}{bar b} will also be measured with different, and possibly lower, systematic errors by Mark II using impact parameter tagging.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6483096
- Report Number(s):
- LBL-29466; CONF-9006268--2; ON: DE91000225
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
645200* -- High Energy Physics-- Particle Interactions & Properties-Theoretical
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATOR FACILITIES
ACCELERATORS
BEAUTY PARTICLES
BOSONS
BRANCHING RATIO
CHARM PARTICLES
DATA
DECAY
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
HADRONIC PARTICLE DECAY
INFORMATION
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEP STORAGE RINGS
LINEAR ACCELERATORS
LINEAR MOMENTUM
MATHEMATICAL MODELS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE IDENTIFICATION
PARTICLE MODELS
PARTICLE PRODUCTION
POSTULATED PARTICLES
QUARKS
SEMILEPTONIC DECAY
STANDARD MODEL
STANFORD LINEAR COLLIDER
STORAGE RINGS
STRANGE PARTICLES
TRANSVERSE MOMENTUM
UNIFIED GAUGE MODELS
WEAK PARTICLE DECAY
Z NEUTRAL BOSONS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATOR FACILITIES
ACCELERATORS
BEAUTY PARTICLES
BOSONS
BRANCHING RATIO
CHARM PARTICLES
DATA
DECAY
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
HADRONIC PARTICLE DECAY
INFORMATION
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEP STORAGE RINGS
LINEAR ACCELERATORS
LINEAR MOMENTUM
MATHEMATICAL MODELS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE IDENTIFICATION
PARTICLE MODELS
PARTICLE PRODUCTION
POSTULATED PARTICLES
QUARKS
SEMILEPTONIC DECAY
STANDARD MODEL
STANFORD LINEAR COLLIDER
STORAGE RINGS
STRANGE PARTICLES
TRANSVERSE MOMENTUM
UNIFIED GAUGE MODELS
WEAK PARTICLE DECAY
Z NEUTRAL BOSONS