The Final SLD Results for A{sub LR} and A{sub lepton}

Technical Report · Thu Oct 12 04:00:00 EDT 2000

DOI:https://doi.org/10.2172/784728· OSTI ID:784728

Abe, Toshinori ^[1]

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1. SLAC

We present the final measurements of the left-right cross-section asymmetry A{sub LR} for Z boson production by e{sup +}e{sup -} collisions and Z boson-lepton coupling asymmetry parameters A{sub e}, A{sub {mu}}, and A{sub {tau}} in leptonic Z decays with the SLD detector at the SLAC Linear Collider. Using the complete sample of polarized Z bosons collected at SLD, we get A{sub LR} = 0.15056 {+-} 0.00239, A{sub e} = 0.1544 {+-} 0.0060, A{sub {mu}} = 0.142 {+-} 0.015, and A{sub {tau}} = 0.136 {+-} 0.015. The A{sub LR} (''' A{sub e}) and Ae results are combined and we find A{sub e} = 0.1516 {+-} 0.0021. Assuming lepton universality, we obtain a combined effective weak mixing angle of sin{sup 2} {theta}{sub W}{sup eff} = 0.23098 {+-} 0.00026. Within the context of the SM, our result prefers a light Higgs mass.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 784728
• Report Number(s): SLAC-PUB-8646
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COUPLING
EAST-WEST ASYMMETRY
ELECTRON-POSITRON COLLISIONS
EXPERIMENTAL DATA
LEPTONIC DECAY
LEPTONS
PARTICLE PRODUCTION
STANFORD LINEAR COLLIDER DETECTOR
WEINBERG ANGLE
Z NEUTRAL BOSONS