Measurement of the Effective Weak Mixing Angle in Events
Journal Article
·
· Physical Review Letters
We present a measurement of the fundamental parameter of the standard model, the weak mixing angle sin2θℓeff which determines the relative strength of weak and electromagnetic interactions, in pp¯→Z/γ*→e+e- events at a center of mass energy of 1.96 TeV, using data corresponding to 9.7 fb-1 of integrated luminosity collected by the D0 detector at the Fermilab Tevatron. The effective weak mixing angle is extracted from the forward-backward charge asymmetry as a function of the invariant mass around the Z boson pole. The measured value of sin2θℓeff=0.23147±0.00047 is the most precise measurement from light quark interactions to date, with a precision close to the best LEP and SLD results.
- Sponsoring Organization:
- USDOE; National Science Foundation (NSF)
- OSTI ID:
- 1198732
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Vol. 115 Journal Issue: 4; ISSN 0031-9007
- Publisher:
- American Physical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 17 works
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