Z boson as “the standard candle” for high-precision W boson physics at LHC
Z boson as “the standard candle” for high-precision W boson physics at LHC
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Z 玻色子作为 LHC 高精度 W 玻色子物理的“标准蜡烛”
DOI：
10.1140/epjc/s10052-007-0321-8
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
A. Siódmok
中科院分区：
文献类型：
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作者：
M. Krasny;F. Fayette;W. Płaczek;A. Siódmok;A. Siódmok
在本文中，我们提出了一个战略，用于测量包括W玻色子的生产过程在大型强子对撞机。这种策略同时利用了LHC对撞机在可变束能量下运行可变束粒子种类的独特灵活性，以及LHC探测器的配置灵活性。我们提出了他们的具体设置的标准模型参数的精确测量。这些专用设置优化了Z玻色子和Drell-Yan对生产过程作为“标准参考蜡烛”的使用。所提出的策略允许一个因式分解和直接测量那些QCD影响不同的W和Z生产过程。它降低到$\mathcal{O}（10^{-4}）$的水平的不确定性的部分子分布函数（PDF）和夸克的横动量的测量精度的影响。最后但并非最不重要的是，它减少了10倍的系统测量误差的影响，如能量尺度和测量分辨率，对W玻色子生产可观测量。
In this paper we propose a strategy for measuring the inclusive W boson production processes at LHC. This strategy exploits simultaneously the unique flexibility of the LHC collider in running variable beam particle species at variable beam energies, and the configuration flexibility of the LHC detectors. We propose their concrete settings for a precision measurement of the standard model parameters. These dedicated settings optimise the use of the Z boson and Drell–Yan-pair production processes as “the standard reference candles”. The presented strategy allows one to factorise and to directly measure those of the QCD effects that affect differently the W and Z production processes. It reduces to a level of $\mathcal{O}(10^{-4})$ the impact of uncertainties in the partonic distribution functions (PDFs) and in the transverse momentum of the quarks on the measurement precision. Last but not the least, it reduces by a factor of 10 the impact of systematic measurement errors, such as the energy scale and the measurement resolution, on the W boson production observables.