First results from SLD with polarized electron beam at SLC

Conference · Mon Nov 30 23:00:00 EST 1992

OSTI ID:10130718

Fero, M J ^[1]

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1. Massachusetts Inst. of Tech., Cambridge, MA (United States)

The SLAC Linear Collider (SLC) has been modified to collide a longitudinally polarized electron beam with the unpolarized positron beam. We review the beginning of polarized beam running at the SLC, and report on the measurement of the left-right cross section asymmetry (A{sub LR}) made with a sample of 10,224 Z decays collected over the course of the 1992 run. The average beam polarization for this set of Z decays was 22.4 {plus_minus} 0.6%(syst.). A{sub LR} was measured to be 0.100 {plus_minus} 0.044(stat.) {plus_minus} 0.004(syst.). From this measurement, the weak mixing angle defined at the Z boson pole is determined to be sin{sup 2}{theta}{sup eff}{sub W} = 0.2378 {plus_minus} 0.0056 {plus_minus} 0.0005.

• 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: 10130718
• Report Number(s): SLAC-PUB--6027; CONF-9207140--5; ON: DE93007932
• Country of Publication: United States
• Language: English

Related Subjects

440104
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
662380
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
CROSS SECTIONS
DECAYS OF INTERMEDIATE BOSONS
ELECTRON BEAMS
HIGH ENERGY PHYSICS INSTRUMENTATION
POLARIZED BEAMS
STANFORD LINEAR COLLIDER
STANFORD LINEAR COLLIDER DETECTOR
WEAK PARTICLE DECAY
WEINBERG ANGLE
Z NEUTRAL BOSONS