Factorization of the forward-backward charge asymmetry and measurements of the weak mixing angle and proton structure at hadron colliders

Abstract

The forward-backward charge asymmetry (AFB) at hadron colliders is sensitive to both the electroweak (EW) symmetry breaking represented by the effective weak mixing angle, and the proton structure information in the initial state modeled by the parton distribution functions (PDFs). Due to their strong correlation, the precisions of the determination on the weak mixing angle and PDFs using the measured AFB spectrum are limited. In this paper, we define a set of structure parameters which factorize the unique proton information of the relative difference between quarks and antiquarks in the AFB observation. Other than the conventional way of extracting the weak mixing angle fro the convolution of PDF and EW calculations, we propose a new method to simultaneously determine the value of the weak mixing angle and the proton structure terms by fitting to the observed AFB distribution, and point out the necessity of specifying additional observations to further reduce the uncertainties on the proton structure terms respectively, so that the model-independent high precision measurements can be achieved at the future LHC experiments.

References in corpus (17)

• Parton distributions from high-precision collider data
• Precision Electroweak Measurements on the Z Resonance
• New CTEQ global analysis of quantum chromodynamics with high-precision data from the LHC
• Parton distributions from LHC, HERA, Tevatron and fixed target data: MSHT20 PDFs
• The Path to Proton Structure at One-Percent Accuracy
• Tevatron Run-1 Z Boson Data and Collins-Soper-Sterman Resummation Formalism
• Soft gluon effects on lepton pairs at hadron colliders
• Perturbative generation of a strange-quark asymmetry in the nucleon
• Measurement of the weak mixing angle using the forward-backward asymmetry of Drell-Yan events in pp collisions at 8 TeV
• Tevatron Run II combination of the effective leptonic electroweak mixing angle
• Measurement of the forward-backward asymmetry in $Z/{\gamma }^{\ast }\to {\mu }^{+}{\mu }^{-}$ decays and determination of the effective weak mixing angle
• Updating and Optimizing Error PDFs in the Hessian Approach. Part II
• Parton Density Uncertainties and the Determination of Electroweak Parameters at Hadron Colliders
• Using Drell-Yan forward-backward asymmetry to reduce PDF uncertainties in the measurement of electroweak parameters
• Neutral Current Forward-Backward Asymmetry: from ${\theta }_W$ to PDF Determinations
• Reduction of PDF uncertainty in the measurement of the weak mixing angle at the ATLAS experiment
• Reduction of the electroweak correlation in the PDF updating by using the forward-backward asymmetry of Drell-Yan process

Cited by in corpus (4)

• Boost Asymmetry of the diboson productions in pp collisions
• Exploring SMEFT Couplings Using the Forward-Backward Asymmetry in Neutral Current Drell-Yan Production at the LHC
• Measurement of the proton structure parameters in the forward-backward charge asymmetry
• Impact of new measurements of light quarks at hadron colliders