Measurement of the Effective Weak Mixing Angle in pp[over ¯]âZ/γ
Phys Rev Lett
; 115(4): 041801, 2015 Jul 24.
Article
em En
| MEDLINE
| ID: mdl-26252676
ABSTRACT
We present a measurement of the fundamental parameter of the standard model, the weak mixing angle sin^{2}θ_{eff}^{â} which determines the relative strength of weak and electromagnetic interactions, in pp[over ¯]âZ/γ^{*}âe^{+}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 sin^{2}θ_{eff}^{â}=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.
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MEDLINE
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article