The quest for $$\mu \rightarrow e \gamma $$μ→eγ and its experimental limiting factors at future high intensity muon beams-猫眼课题宝

未来高强度μ子束$$mu ightarrow e gamma $$μ→eγ的探索及其实验限制因素

DOI：

10.1140/epjc/s10052-017-5444-y

发表时间：

2017

期刊：

The European Physical Journal C

影响因子：

通讯作者：

中科院分区：

文献类型：

作者：

G. Cavoto;A. Papa;F. Renga;E. Ripiccini;C. Voena

由于MEG-II实验，对违反衰变$$\mu ^+ \rightarrow e^+ \gamma $$ μ+→e+γ的轻子风味的搜索将在未来五年内达到前所未有的灵敏度水平。这个实验将在保罗·谢勒研究所收集数据，在那里，连续的μ子束以每秒$$10^8$$ 108 μ子的速度传递。在相同的时间尺度上，加速器有望在各种设施中升级，使连续光束的强度达到每秒$$10^9$$ 109甚至$$10^{10}$$ 1010 μ子成为可能。我们研究了实验的限制因素，这些限制因素将决定最终的性能，因此灵敏度，在搜索$$\mu ^+ \rightarrow e^+ \gamma $$ μ+→e+γ的连续光束在这些极高的速率。然后，我们考虑了一些概念探测器设计，并评估了相应的灵敏度作为光束强度的函数。

The search for the lepton flavor violating decay $$\mu ^+ \rightarrow e^+ \gamma $$μ+→e+γ will reach an unprecedented level of sensitivity within the next five years thanks to the MEG-II experiment. This experiment will take data at the Paul Scherrer Institut where continuous muon beams are delivered at a rate of about $$10^8$$108 muons per second. On the same time scale, accelerator upgrades are expected in various facilities, making it feasible to have continuous beams with an intensity of $$10^9$$109 or even $$10^{10}$$1010 muons per second. We investigate the experimental limiting factors that will define the ultimate performances, and hence the sensitivity, in the search for $$\mu ^+ \rightarrow e^+ \gamma $$μ+→e+γ with a continuous beam at these extremely high rates. We then consider some conceptual detector designs and evaluate the corresponding sensitivity as a function of the beam intensity.

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