论文标题
单$π^0 $生产$μe$ $ scatting in Muone
Single $π^0$ production in $μe$ scattering at MUonE
论文作者
论文摘要
最近提出的在CERN的Muone实验旨在通过研究相对较小的动量转移时研究弹性MUON电子散射对MUON异常磁矩的新确定。 10ppm的预期准确性对辐射校正的高精度预测对$μe零件的高精度预测以及对所有可能的背景过程的强大定量估计值进行了高精度预测。在这封信中，研究了由于过程$μE\至μeπ^0 $的中性牵引引起的贡献，并通过升级的蒙特卡洛事件发生器发电机ermesmer在不同的相空间配置中讨论了其数值影响。实际上，单个$π^0 $生产可能是降低背景的来源，用于测量Muone的QED运行耦合常数，它也可能是Muone可能在Muone进行新物理搜索的重要背景，涉及$ 2 \至3 $过程，在相位空间区域中，与弹性$ $ $ gulastic $ gutsportions cooplestion coptions copections coptions coption consection。
The recently proposed MUonE experiment at CERN aims at providing a novel determination of the leading order hadronic contribution to the muon anomalous magnetic moment through the study of elastic muon-electron scattering at relatively small momentum transfer. The anticipated accuracy of the order of 10ppm demands for high-precision prediction in radiative corrections to the $μe$ scattering as well as for robust quantitative estimates of all possible background processes. In this letter, the contribution due to the emission of a neutral pion through the process $μe \to μe π^0$ is studied and its numerical impact is discussed in different phase space configurations by means of the upgraded Monte Carlo event generator MESMER. In fact, single $π^0$ production could be a source of reducible background for the measurement of the QED running coupling constant at MUonE and it could be also an important background for possible New Physics searches at MUonE involving $2 \to 3$ processes, in phase space regions complementary to the ones characteristic of the elastic $μe$ scattering.
