论文标题
用于船舶实验的万能通量的测量
Measurement of the muon flux for the SHiP experiment
论文作者
论文摘要
船舶实验将搜索超出标准模型以外的非常弱的相互作用的粒子，该粒子是在Cern SPS处的400 \ gev/$ c $ proton束转储中产生的。每个溢出物将在转储中生产约$ 10^{11} $ um。为了设计实验，以使MUON诱导的背景被最小化，需要对MUON光谱的精确知识。为了验证我们的Pythia和基于Geant4的Monte Carlo Simulation（Fairship）产生的MUON通量，我们测量了SPS的类似船舶的目标。该目标由13个相互作用的钼和钨板组成，然后将2.4 m的铁子吸收剂放置在H4 400〜 \ gev/$ c $ proton束线中。为了识别雄性和测量动量频谱，使用了带有漂移管和MUON标签器的光谱仪。在为期三周的时间里，一个用于分析的数据集对应于$（3.27 \ pm0.07）〜\ times〜10^{11} $ protons target上的质子。这大约为船舶溢出的1％。
The SHiP experiment will search for very weakly interacting particles beyond the Standard Model which are produced in a 400 \GeV/$c$ proton beam dump at the CERN SPS. About $10^{11}$ muons per spill will be produced in the dump. To design the experiment such that the muon-induced background is minimized, a precise knowledge of the muon spectrum is required. To validate the muon flux generated by our Pythia and GEANT4 based Monte Carlo simulation (FairShip), we have measured the muon flux emanating from a SHiP-like target at the SPS. This target, consisting of 13 interaction lengths of slabs of molybdenum and tungsten, followed by a 2.4 m iron hadron absorber was placed in the H4 400~\GeV/$c$ proton beam line. To identify muons and to measure the momentum spectrum, a spectrometer instrumented with drift tubes and a muon tagger were used. During a three-week period a dataset for analysis corresponding to $(3.27\pm0.07)~\times~10^{11}$ protons on target was recorded. This amounts to approximatively 1\% of a SHiP spill.
