Energy resolution and linearity of XENON1T in the MeV energy range
Energy resolution and linearity of XENON1T in the MeV energy range
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DOI：
10.1140/epjc/s10052-020-8284-0
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发表时间：
2020-08-27
影响因子：
4.4
通讯作者：
Zopounidis, J. P.
中科院分区：
文献类型：
--
作者：
Aprile, E.;Aalbers, J.;Zopounidis, J. P.
氙双相时间投影室设计用于寻找弱相互作用的大质量粒子，迄今为止已经显示出相对能量分辨率，由于饱和效应，该相对能量分辨率随着能量高于200 keV而降低。这限制了它们在寻找罕见事件时的灵敏度，例如在Q值（Q（beta beta））接近或等于2.46 MeV的情况下，Xe-136的无中微子双β衰变。对于XENON 1 T双相时间投影室，我们证明了在1 sigma/mu的相对能量分辨率在其一吨基准质量中低至（0.80 +/- 0.02）%，并且对于在Q（β β）的单位点相互作用。我们还提出了一种新的信号校正方法，以纠正信号读出系统的饱和效应，导致更准确的位置重建和间接提高能量分辨率。XENON 1 T取得的非常好的结果为氙双相暗物质探测器同时搜索其他罕见事件开辟了新的窗口。
Xenon dual-phase time projection chambers designed to search for weakly interacting massive particles have so far shown a relative energy resolutionwhich degrades with energy above similar to 200 keV due to the saturation effects. This has limited their sensitivity in the search for rare events like the neutrinoless double-beta decay of Xe-136 at its Q value, Q(beta beta) similar or equal to 2.46 MeV. For the XENON1T dual-phase time projection chamber, we demonstrate that the relative energy resolution at 1 sigma/mu is as low as (0.80 +/- 0.02)% in its one-ton fiducial mass, and for single-site interactions at Q(beta beta). We also present a new signal correction method to rectify the saturation effects of the signal readout system, resulting in more accurate position reconstruction and indirectly improving the energy resolution. The very good result achieved in XENON1T opens up new windows for the xenon dual-phase dark matter detectors to simultaneously search for other rare events.