PADME光束线蒙特卡洛模拟

论文标题

PADME光束线蒙特卡洛模拟

The PADME beam line Monte Carlo simulation

论文作者

Bossi, F., Branchini, P., Buonomo, B., Capirossi, V., Caricato, A. P., Chiodini, G., De Sangro, R., Di Giulio, C., Domenici, D., Ferrarotto, F., Fiore, S., Finocchiaro, G., Foggetta, L. G, Frankenthal, A., Garattini, M., Georgiev, G., Ghigo, A., Gianotti, P., Iazzi, F., Ivanov, S., Ivanov, Sv., Kozhuharov, V., Leonardi, E., Long, E., Martino, M., Oceano, I., Oliva, F., Organtini, G. C., Pinna, F., Piperno, G., Raggi, M., Sarra, I., Simeonov, R., Spadaro, T., Spagnolo, S., Spiriti, E., Tagnani, D., Taruggi, C., Valente, P., Variola, A., Vilucchi, E.

论文摘要

Frascati的INFN实验室的Da $φ$ NE梁测试设施（BTF）进行的PADME实验旨在搜索具有正电子光束和薄固定目标的电子质体灭绝事件中的黑暗扇形颗粒的衰变，并通过测量单杆最终状态的缺失质量。源自梁光环颗粒的背景的存在可以显着降低实验的灵敏度。为了彻底了解梁背景贡献的起源，已经开发了基于Geant4的详细蒙特卡洛模拟，其中包含对检测器以及梁线及其光学元素的完整描述。该模拟允许在光束线传输和检测过程中描述每个粒子的完整相互作用，这是一种创新的方法来获得可靠的背景预测

The PADME experiment at the DA$Φ$NE Beam-Test Facility (BTF) of the INFN Laboratory of Frascati is designed to search for invisible decays of dark sector particles produced in electron-positron annihilation events with a positron beam and a thin fixed target, by measuring the missing mass of single-photon final states. The presence of backgrounds originating from beam halo particles can significantly reduce the sensitivity of the experiment. To thoroughly understand the origin of the beam background contribution, a detailed Geant4-based Monte Carlo simulation has been developed, containing a full description of the detector together with the beam line and its optical elements. This simulation allows the full interactions of each particle to be described, both during beam line transport and during detection, a possibility which represents an innovative way to obtain reliable background predictions

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