First measurement of the left-right cross section asymmetry in Z boson production at E[sub cm] = 91. 55 GeV

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

OSTI ID:6912479

Rowson, P C ^[1]

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1. Columbia Univ., New York, NY (United States). Dept. of Physics

The left-right cross section asymmetry for Z boson production in e[sup +]e[sup -] annihilation (A[sub LR]) has been measured at E[sub cm] = 91.55 GeV with the SLD detector at the SLAC Linear Collider (SLC) using a longitudinally polarized electron beam. The electron polarization was continually monitored with a Compton scattering polarimeter, and was typically 22%. We have accumulated a sample of [approximately]10,200 Z events. We find that A[sup LR] = 0.100 [plus minus] 0.044 [plus minus] 0.003 where the first error is statistical and the second is systematic. From this measurement, we determine the weak mixing angle defined at the Z boson pole to be sin[sup 2][theta](lept/w) = 0.2378 [plus minus] 0.0056.

• 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: 6912479
• Report Number(s): SLAC-PUB-5902; CONF-920837--20; ON: DE93004089
• Country of Publication: United States
• Language: English

Related Subjects

662310* -- Weak & Electromagnetic Interactions of Leptons-- (1992-)
662440 -- Properties of Other Particles Including Hypothetical Particles-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BASIC INTERACTIONS
BEAMS
BOSONS
COMPTON EFFECT
CROSS SECTIONS
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEPTON-LEPTON INTERACTIONS
MEASURING INSTRUMENTS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
POLARIMETERS
POLARIZED BEAMS
RADIATION DETECTORS
SCATTERING
SHOWER COUNTERS
STANFORD LINEAR COLLIDER DETECTOR
WEINBERG ANGLE
Z NEUTRAL BOSONS