ICHEP 2016 Chicago

Measurements and combinations of effective weak angle in Drell-Yan di-electron and di-muon channels at CDF and D0 (15'+5')

5 Aug 2016, 12:00

20m

Huron

Oral Presentation Top Quark and Electroweak Physics Top Quark and Electroweak Physics

Speaker

Willis Sakumoto (University of Rochester, Rochester NY)

Description

We present the measurements of forward-backward charge asymmetry $A_{FB}$ in
$p\overline{p}\to Z/{\gamma }^{\ast }\to e^{+}{e}^{-}/{\mu }^{+}{\mu }^{-}+X$ events
using $\sim 10$fb${}^{-1}$ of $p\overline{p}$ data collected at $\sqrt{s}=1.96$TeV by the D0
and CDF detectors at the Fermilab Tevatron collider. $A_{FB}$ is measured as a function
of the invariant mass of the dilepton system to extract the effective weak mixing angle ${\sin }^2{\theta }_{eff}^{lep}$.
In the context of the standard model, using the on-shell renormalization scheme where
${\sin }^2{\theta }_W=1-M_W^2/M_Z^2$, measurements of ${\sin }^2{\theta }_{eff}^{lep}$
yield indirect extractions of the W mass. We discuss the recent measurement of ${\sin }^2{\theta }_{eff}^{lep}$
using di-muon events at D0 and its combination with the di-electron channel [ PRL 115, 041801 (2015)].
We also present the CDF-legacy measurement of ${\sin }^2{\theta }_{eff}^{lep}$ using electron pairs
and its combination with the previous CDF-legacy measurement using muon pairs [PRD 89, 072005 (2014)].
We also present the combination of the D0 and CDF results.

Presentation materials

sw2ichep16.pdf