Impact of LHCb 13 TeV W and Z pseudo-data on the parton distribution functions

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: PARTICLES AND FIELDS
• 页码范围: 211-221
• 页数: 11页
• 语种: 英文
• DOI: 10.1088/1674-1137/abcd90

摘要

We study the potential of the LHCb 13 TeV single w and Z boson pseudo-data for constraining the par-ton 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 EPUMP.The sensitivities of various experimental ob-servables 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 pT and rapidity can greatly reduce the uncertainty bands of u and d quarks in almost the whole x range,as compared to vari-ous single observable measurements.