Measurement of the weak mixing angle with the Drell-Yan process in proton-proton collisions at the LHC

Abstract

A multivariate likelihood method to measure electroweak couplings with the Drell-Yan process at the LHC is presented. The process is described by the dilepton rapidity, invariant mass, and decay angle distributions. The decay angle ambiguity due to the unknown assignment of the scattered constituent quark and antiquark to the two protons in a collision is resolved statistically using correlations between the observables. The method is applied to a sample of dimuon events from proton-proton collisions at sqrt(s) = 7 TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 1.1 inverse femtobarns. From the dominant u-ubar, d-dbar to gamma*/Z to opposite sign dimuons process, the effective weak mixing angle parameter is measured to be sin^2(theta[eff]) = 0.2287 +/- 0.0020 (stat.) +/- 0.0025 (syst.). This result is consistent with measurements from other processes, as expected within the standard model.

References in corpus (10)

• PYTHIA 6.4 Physics and Manual
• Parton distributions for the LHC
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• New parton distributions for collider physics
• The PDF4LHC Working Group Interim Recommendations
• NLO vector-boson production matched with shower in POWHEG
• Precision electroweak calculation of the production of a high transverse-momentum lepton pair at hadron colliders
• Structure Functions
• Measurement of the forward-backward charge asymmetry and extraction of sin^2Theta^{eff}_W in ppbar -> Z/γ^{*}+X -> e+e+X events produced at \sqrt{s}=1.96 TeV
• Measurement of sin^2θ_{eff}^{lept} and Z-light quark couplings using the forward-backward charge asymmetry in p\bar{p} -> Z/γ^{*} -> e^{+}e^{-} events with L=5.0 fb^{-1} at \sqrt{s}=1.96 TeV

Cited by in corpus (49)

• Combining QCD and electroweak corrections to dilepton production in FEWZ
• Constraints on the spin-parity and anomalous HVV couplings of the Higgs boson in proton collisions at 7 and 8 TeV
• On the spin and parity of a single-produced resonance at the LHC
• Constraining anomalous HVV interactions at proton and lepton colliders
• Electroweak precision observables and Higgs-boson signal strengths in the Standard Model and beyond: present and future
• The PDF4LHC report on PDFs and LHC data: Results from Run I and preparation for Run II
• The Weak Neutral Current
• Drell-Yan lepton-pair production: $q_T$ resummation at N${}^3$LL accuracy and fiducial cross sections at N${}^3$LO
• Measurement of the weak mixing angle using the forward-backward asymmetry of Drell-Yan events in pp collisions at 8 TeV
• The Matrix Element Method at Next-to-Leading Order
• Explaining $b\to s{\ell }^{+}{\ell }^{-}$ and the Cabibbo Angle Anomaly with a Vector Triplet
• DYTurbo: Fast predictions for Drell-Yan processes
• Precise predictions for the angular coefficients in Z-boson production at the LHC
• New features in the JHU generator framework: constraining Higgs boson properties from on-shell and off-shell production
• Tevatron Run II combination of the effective leptonic electroweak mixing angle
• 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
• SMEFT analysis of vector boson scattering and diboson data from the LHC Run II
• Alignment of the CMS tracker with LHC and cosmic ray data
• Mixed QCD-electroweak corrections to on-shell Z production at the LHC
• Anomalies in Particle Physics
• $A_{FB}$ in the SMEFT: precision Z physics at the LHC
• Study of weak corrections to Drell-Yan, top-quark pair and dijet Production at high energies with MCFM
• Strange Quark PDFs and Implications for Drell-Yan Boson Production at the LHC
• Forward-backward asymmetry of Drell-Yan lepton pairs in pp collisions at sqrt(s) = 7 TeV
• Forward-backward asymmetry of Drell-Yan lepton pairs in pp collisions at sqrt(s) = 8 TeV
• 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
• Update of the electroweak precision fit, interplay with Higgs-boson signal strengths and model-independent constraints on new physics
• Returning CP-Observables to The Frames They Belong
• Unified Explanation of the Anomalies in Semi-Leptonic $B$ decays and the $W$ Mass
• PDF Profiling Using the Forward-Backward Asymmetry in Neutral Current Drell-Yan Production
• 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
• Constraining anomalous Higgs boson couplings to virtual photons
• Neutrino counting experiments and non-unitarity from LEP and future experiments
• Electroweak constraints on flavorful effective theories
• Stairway to discovery: a report on the CMS programme of cross section measurements from millibarns to femtobarns
• Production of electroweak bosons at hadron colliders: theoretical aspects
• Vector Bosons and Jets in Proton Collisions
• Review of single vector boson production in pp collisions at $\sqrt{s}=7$ TeV
• Measurement of the Effective Weak Mixing Angle in $p\bar{p}\to Z/{\gamma }^{\ast }\to {\ell }^{+}{\ell }^{-}$ Events
• On electroweak corrections to neutral current Drell-Yan with the POWHEG BOX
• Probing the weak mixing angle at high energies at the LHC and HL-LHC
• Cross Section Prediction for Inclusive Production of Z Boson in $pp$ Collisions at $\sqrt{s}$$=14$ TeV: A Study of Systematic Uncertainty Due to Scale Dependence
• 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
• Precision Measurements of Electroweak Parameters with Z Bosons at the Tevatron
• Electroweak Measurements with the ATLAS and CMS Experiments
• Methods for a measurement of $\tau$ polarization asymmetry in the decay $Z\to \tau \tau$ at LHC and determination of the effective weak mixing angle
• Electroweak measurements from $W$, $Z$ and photon final states