Instrumental uncertainties in radiative corrections for the MUSE experiment

Instrumental uncertainties in radiative corrections for the MUSE experiment
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MUSE 实验辐射校正中的仪器不确定性

DOI:
10.1140/epja/s10050-023-01215-0
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发表时间:
2024
期刊:
The European Physical Journal A
影响因子:
--
通讯作者:
Fernando, I. P.
Fernando, I. P.
中科院分区:
--
文献类型:
--
作者:
Li, L.;Strauch, S.;Bernauer, J. C.;Briscoe, W. J.;Christopher Ndukwe, A.;Cline, E.;Cohen, D.;Deiters, K.;Downie, E. J.;Fernando, I. P.

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Paul Scherrer 研究所的 MUSE 实验正在使用带正电和负电的电子和 μ 子测量 Q2 约 0.002–0.08 GeV2 的四动量转移范围内的弹性轻子-质子散射截面。从实验数据中提取玻恩截面需要辐射校正。使用 ESEPP 事件生成器对这些修正中的仪器不确定性进行了估计。结果尤其取决于对实验横截面有贡献的最小轻子动量以及在 MUSE 量热计中检测到并从数据中排除的具有硬初始态辐射的事件的分数。这些结果表明,电子截面辐射校正中与角度相关的仪器不确定性小于 0.4%,对于 μ 子截面而言可以忽略不计。
The MUSE experiment at the Paul Scherrer Institute is measuring elastic lepton-proton scattering cross sections in a four-momentum transfer range fromQ2of approximately 0.002–0.08 GeV2using positively and negatively charged electrons and muons. The extraction of the Born cross sections from the experimental data requires radiative corrections. Estimates of the instrumental uncertainties in those corrections have been made using the ESEPP event generator. The results depend in particular on the minimum lepton momentum that contributes to the experimental cross section and the fraction of events with hard initial-state radiation that is detected in the MUSE calorimeter and is excluded from the data. These results show that the angular-dependent instrumental uncertainties in radiative corrections to the electron cross section are less than 0.4% and are negligible for the muon cross section.
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