论文标题
使用正电子光束进行PADME实验的调试
Commissioning of the PADME experiment with a positron beam
论文作者
论文摘要
PADME实验旨在寻找一种假设的深色光子$ a^{\ prime} $，在Infn Laboratori nazionali di frascati的束测试设施中使用束信号梁在positron-electron an灭中产生。对$ a^{\ prime} $ - 光子混合参数$ε$的预期敏感性为10 $^{ - 3} $，对于$ a^{\ prime} $ s $ $ \ le $ \ le $ 23.5 mev/$ c^{2} $，收集了$ \ sim 10^$ \ sim 10^{13} $ positrons-on-target。 本文在2019年7月进行调试后介绍了PADME检测器状态。此外，还详细说明了用于重建物理对象的软件算法，例如光子和带电的粒子，例如光子和带电的颗粒，并详细说明了所采用的校准程序。结果表明，实验设备达到了设计性能，并且能够识别和测量标准的电磁过程，例如正电子bremsstrahlung，电子 - 置液歼灭到两个光子中。
The PADME experiment is designed to search for a hypothetical dark photon $A^{\prime}$ produced in positron-electron annihilation using a bunched positron beam at the Beam Test Facility of the INFN Laboratori Nazionali di Frascati. The expected sensitivity to the $A^{\prime}$-photon mixing parameter $ε$ is 10$^{-3}$, for $A^{\prime}$ mass $\le$ 23.5 MeV/$c^{2}$ after collecting $\sim 10^{13}$ positrons-on-target. This paper presents the PADME detector status after commissioning in July 2019. In addition, the software algorithms employed to reconstruct physics objects, such as photons and charged particles, and the calibration procedures adopted are illustrated in detail. The results show that the experimental apparatus reaches the design performance, and is able to identify and measure standard electromagnetic processes, such as positron Bremsstrahlung, electron-positron annihilation into two photons.
