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:10102647

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: USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 10102647
• Report Number(s): SLAC-PUB--5902; CONF-920837--20; ON: DE93004089
• Country of Publication: United States
• Language: English

Related Subjects

662310
662440
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
COMPTON EFFECT
CROSS SECTIONS
ELECTRON-POSITRON INTERACTIONS
PARTICLE PRODUCTION
POLARIMETERS
POLARIZED BEAMS
PROPERTIES OF OTHER PARTICLES INCLUDING HYPOTHETICAL PARTICLES
SHOWER COUNTERS
STANFORD LINEAR COLLIDER DETECTOR
WEAK AND ELECTROMAGNETIC INTERACTIONS OF LEPTONS
WEINBERG ANGLE
Z NEUTRAL BOSONS