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

Conference · Sat Feb 01 04:00:00 EST 1992 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:5633213

Rowson, P C ^[1]

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1. Columbia University, Department of Physics, New York, NY 10027 (United States) Stanford Linear Accelerator, Stanford University, Stanford, CA 94309 (United States)

The left-right cross section asymmetry for [ital Z] boson production in [ital e][sup +][ital e][sup [minus]] annihilation ([ital A][sub [ital LR]]) has been measured at [ital E][sub [ital 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 [similar to]10,200 [ital Z] events. We find that [ital A][sub [ital LR]]=0.100[plus minus]0.444[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 [ital Z] boson pole to be sin[sup 2][theta][sub [ital W]][sup lept] = 0.2378 [plus minus] 0.0056.

• DOE Contract Number: AC03-76SF00515
• OSTI ID: 5633213
• Report Number(s): CONF-920837--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 272:1
• Country of Publication: United States
• Language: English

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ACCELERATOR FACILITIES
ACCELERATORS
ANNIHILATION
ASYMMETRY
BASIC INTERACTIONS
BEAMS
BOSONS
COMPTON EFFECT
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LEPTON BEAMS
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