arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2009.03181hep-ph
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LHCb 13 TeV $W$和$Z$伪数据对部分子分布函数的影响

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

摘要:

研究了LHCb 13 TeV单粒子$W^{\pm}$和$Z$玻色子赝数据对质子部分子分布函数的约束作用.作为一个例子,我们证明了LHCb 13 TeV的数据,收集与5 fb $^{-1}$和300 fb $^{-1}$的积分光度,以减少PDF的不确定性带的CT 14 HERA 2 PDF,使用错误PDF更新包{ \sc ePump}的灵敏度。比较了各种实验观测量的灵敏度。通常,在300 fb $^{-1}$数据样本中,特别是在小$x$区域,可以观察到PDF不确定性的显著降低。与各种单个可观测测量相比,$Z$玻色子$p_T$和快度的双微分截面测量可以大大减少几乎整个$x$范围内$u$和$d$夸克的不确定带。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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