A preliminary measurement of R[sub b] = [Gamma]([Zeta][degrees] [yields] b[bar b])/[Gamma]([Zeta][degrees] [yields] hadrons) at SLD

Conference · Sun Nov 01 04:00:00 EST 1992

OSTI ID:7368727

Su, D ^[1]

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1. Rutherford Appleton Lab., Chilton (United Kingdom)

We present a preliminary measurement of R[sub b], the ratio of [Gamma](Z[degree] - b[bar b]) relative to [Gamma](Z[degree] [yields] hadrons) using the silicon CCD-pixel vertex detector of the SLD at the SLAC Linear Collider (SLC). An impact parameter method and a displaced vertex method are applied to all charged tracks, to efficiently tag Z[degree] - b[bar b] events. From the impact (displaced vertex) approach we find R[sub b] = 0.214 [plus minus] 0.010 [plus minus] 0.025 (R[sub b] = 0.204 [plus minus] 0.010 [plus minus] 0.030), consistent with the standard model value.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 7368727
• Report Number(s): SLAC-PUB-5972; CONF-921122--64; ON: DE93015248
• Country of Publication: United States
• Language: English

Related Subjects

662380* -- Decays of Intermediate Bosons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATOR FACILITIES
ACCELERATORS
BEAM POSITION
BOSONS
BRANCHING RATIO
CALCULATION METHODS
DECAY
ELEMENTARY PARTICLES
ERRORS
HADRONIC PARTICLE DECAY
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LINEAR ACCELERATORS
MONTE CARLO METHOD
PARTICLE DECAY
PERFORMANCE
STANFORD LINEAR COLLIDER
STANFORD LINEAR COLLIDER DETECTOR
Z NEUTRAL BOSONS