PADME电磁热量表的表征和性能

论文标题

PADME电磁热量表的表征和性能

Characterisation and performance of the PADME electromagnetic calorimeter

论文作者

Albicocco, P., Alexander, J., Bossi, F., Branchini, P., Buonomo, B., Capoccia, C., Capitolo, E., Chiodini, G., Caricato, A. P., de Sangro, R., Di Giulio, C., Domenici, D., Ferrarotto, F., Finocchiaro, G., Fiore, S., Foggetta, L. G., Frankenthal, A., Georgiev, G., Ghigo, A., Giacchino, F., Gianotti, P., Ivanov, S., Kozhuharov, V., Leonardi, E., Liberti, B., Long, E., Martino, M., Oceano, I., Oliva, F., Organtini, G. C., Piperno, G., Raggi, M., Tehrani, F. Safai, Sarra, I., Sciascia, B., Simeonov, R., Saputi, A., Spadaro, T., Spagnolo, S., Spiriti, E., Tagnani, D., Taruggi, C., Tsankov, L., Valente, P., Vilucchi, E.

论文摘要

LNF梁测试设施的PADME实验搜索了用固定目标的电子歼灭正上音时产生的深色光子。该策略是寻找反应$ e^{+}+e^{ - } \rightarrowγ+a'$，其中$ a'$是深色光子，无法直接观察到它的衰减产物。电磁热量计通过测量最终状态$γ$的能量和位置在实验中起关键作用。可以从这些信息和粒子质量中评估丢失的四弹药。本文介绍了PADME电磁热量计的设计，结构和校准。实验第一阶段的均衡，检测效率和能量分辨率方面取得的结果证明了用于改善早期原型的各种工具的有效性。

The PADME experiment at the LNF Beam Test Facility searches for dark photons produced in the annihilation of positrons with the electrons of a fix target. The strategy is to look for the reaction $e^{+}+e^{-}\rightarrow γ+A'$, where $A'$ is the dark photon, which cannot be observed directly or via its decay products. The electromagnetic calorimeter plays a key role in the experiment by measuring the energy and position of the final-state $γ$. The missing four-momentum carried away by the $A'$ can be evaluated from this information and the particle mass inferred. This paper presents the design, construction, and calibration of the PADME's electromagnetic calorimeter. The results achieved in terms of equalisation, detection efficiency and energy resolution during the first phase of the experiment demonstrate the effectiveness of the various tools used to improve the calorimeter performance with respect to earlier prototypes.

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