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arXiv · 2009.03181

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

Qilin Deng·Qundong Han·Hang Yin·Sayipjamal Dulat·Tie-Jiun Hou·C. -P. Yuan
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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.

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Qilin Deng, Qundong Han, Hang Yin, Sayipjamal Dulat, Tie-Jiun Hou, C. -P. Yuan. 2021-01-25. Impact of LHCb 13 TeV $W$ and $Z$ pseudo-data on the Parton Distribution Functions. https://doi.org/10.1088/1674-1137%2Fabcd90

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