Measurement of the Effective Weak Mixing Angle in $p\bar{p}\to Z/{\gamma }^{\ast }\to {\ell }^{+}{\ell }^{-}$ Events

Abstract

We present a measurement of the effective weak mixing angle parameter ${\sin }^2{\theta }_{\text{eff}}^{\ell }$, in $p\bar{p}\to Z/{\gamma }^{\ast }\to {\mu }^{+}{\mu }^{-}$ events at a center of mass energy of 1.96 TeV, collected by the D0 detector at the Fermilab Tevatron Collider and corresponding to 8.6 fb${}^{-1}$ of integrated luminosity. The measured value of ${\sin }^2{\theta }_{\text{eff}}^{\ell }[\mu \mu ]=0.23016\pm 0.00064$ is further combined with the result from the D0 measurement in $p\bar{p}\to Z/{\gamma }^{\ast }\to e^{+}{e}^{-}$ events, resulting in ${\sin }^2{\theta }_{\text{eff}}^{\ell }[\text{comb.}]=0.23095\pm 0.00040$. This combined result is the most precise measurement from a single experiment at a hadron collider and is the most precise determination using the coupling of the $Z/{\gamma }^{\ast }$ to light quarks.

arXiv commentsubmitted to Phys. Rev. Lett

References in corpus (20)

• Parton distributions for the LHC Run II
• High-Energy-Physics Event Generation with PYTHIA 6.1
• ALPGEN, a generator for hard multiparton processes in hadronic collisions
• Precision Electroweak Measurements on the Z Resonance
• The Upgraded D0 Detector
• Soft gluon effects on lepton pairs at hadron colliders
• Weak mixing angle at low energies
• Combination of the top-quark mass measurements from the Tevatron collider
• The Layer 0 Inner Silicon Detector of the D0 Experiment
• Combination of CDF and D0 W-Boson Mass Measurements
• Design and Implementation of the New D0 Level-1 Calorimeter Trigger
• Measurement of the weak mixing angle with the Drell-Yan process in proton-proton collisions at the LHC
• Extracting Muon Momentum Scale Corrections for Hadron Collider Experiments
• Measurement of the forward-backward asymmetry of electron and muon pair-production in $pp$ collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector
• Measurement of the forward-backward asymmetry in $Z/{\gamma }^{\ast }\to {\mu }^{+}{\mu }^{-}$ decays and determination of the effective weak mixing angle
• Muon reconstruction and identification with the Run II D0 detector
• Indirect measurement of ${\sin }^2{\theta }_W$ (or $M_W$) using ${\mu }^{+}{\mu }^{-}$ pairs from ${\gamma }^{\ast }/Z$ bosons produced in $p\bar{p}$ collisions at a center-of-momentum energy of 1.96 TeV
• Measurement of the effective weak mixing angle in $p\bar{p}\to Z/{\gamma }^{\ast }\to e^{+}{e}^{-}$ events
• Indirect measurement of $si{n}^2{\theta }_W$ (M_W) using e+e- pairs in the Z-boson region with $p\bar{p}$ collisions at a center-of-momentum energy of 1.96 TeV
• Measurement of ${\sin }^2{\theta }_{\mathrm{eff}}^{\mathrm{lept}}$ using $e^{+}{e}^{-}$ pairs from ${\gamma }^{\ast }/Z$ bosons produced in $p\bar{p}$ collisions at a center-of-momentum energy of 1.96 TeV

Cited by in corpus (5)

• Measurement of the weak mixing angle using the forward-backward asymmetry of Drell-Yan events in pp collisions at 8 TeV
• Electroweak Precision Tests of the Standard Model after the Discovery of the Higgs Boson
• Higgs boson self-coupling constraints from single Higgs, double Higgs and Electroweak measurements
• Searching for new physics effects in future $W$ mass and ${\sin }^2{\theta }_W(Q^2)$ determinations
• Measurement of the Drell-Yan forward-backward asymmetry and of the effective leptonic weak mixing angle in proton-proton collisions at $\sqrt{s}$ = 13 TeV