Impact of LHCb 13 TeV $W$ and $Z$ pseudo-data on the Parton Distribution Functions

Abstract

We study the potential of the LHCb 13 TeV single $W^{\pm }$ and $Z$ boson pseudo-data for constraining the parton distribution functions (PDFs) of the proton. As an example, we demonstrate the sensitivity of the LHCb 13 TeV data, collected with integrated luminosities of 5 fb${}^{-1}$ and 300 fb${}^{-1}$, to reducing the PDF uncertainty bands of the CT14HERA2 PDFs, using the error PDF updating package {\sc ePump}. The sensitivities of various experimental observables are compared. Generally, sizable reductions in PDF uncertainties can be observed in the 300 fb${}^{-1}$ data sample, particularly in the small-$x$ region. The double-differential cross section measurement of $Z$ boson $p_T$ and rapidity can greatly reduce the uncertainty bands of $u$ and $d$ quarks in almost the whole $x$ range, as compared to various single observable measurements.

arXiv comment25 pages, 13 figures

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Cited by in corpus (3)

• Precision measurement of forward $Z$ boson production in proton-proton collisions at $\sqrt{s}=13$ TeV
• Lepton-Charge and Forward-Backward Asymmetries in Drell-Yan Processes for Precision Electroweak Measurements and New Physics Searches
• Determining the helicity structure of the nucleon at the Electron Ion Collider in China