Understanding and constraining the PDF uncertainties in a W boson mass measurement with forward muons at the LHC
Understanding and constraining the PDF uncertainties in a W boson mass measurement with forward muons at the LHC
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DOI：
10.1140/epjc/s10052-019-6997-8
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发表时间：
2019-02
期刊：
影响因子：
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通讯作者：
S. Farry;O. Lupton;M. Pili;M. Vesterinen
中科院分区：
文献类型：
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作者：
S. Farry;O. Lupton;M. Pili;M. Vesterinen
精确的电弱测试是对标准模型之外的物理学的一个强有力的探测，但是灵敏度受到W玻色子质量（）测量精度的限制。粒子分布函数（PDF）的不确定性是用LHC数据测量的一个潜在限制.最近有人指出，由于LHCb独特的前向快度接受能力，LHCb的一种新的测量方法可以改善这种情况。在这里，我们报告了详细的研究机制，推动PDF的不确定性在LHCb测量，并提出了一种方法，应减少这种不确定性的大约一个因素的两个使用LHCb运行2数据。
Precision electroweak tests are a powerful probe of physics beyond the Standard Model, but the sensitivity is limited by the precision with which theWboson mass () has been measured. The Parton Distribution Function (PDF) uncertainties are a potential limitation for measurements ofwith LHC data. It has recently been pointed out that, thanks to LHCb’s unique forward rapidity acceptance, a new measurement ofby LHCb can improve this situation. Here we report on a detailed study on the mechanism driving the PDF uncertainty in the LHCb measurement of, and propose an approach which should reduce this uncertainty by roughly a factor of two using LHCb Run 2 data.