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arXiv 0912.3689astro-ph.IM
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CRESST暗物质搜索的现状

Status of the CRESST Dark Matter Search

J. Schmaler, G. Angloher, M. Bauer, I. Bavykina, A. Bento, A. Brown, C. Bucci, C. Ciemniak, C. Coppi, G. Deuter, F. von Feilitzsch, D. Hauff, S. Henry, P. Huff,… 展开作者

J. Schmaler, G. Angloher, M. Bauer, I. Bavykina, A. Bento, A. Brown, C. Bucci, C. Ciemniak, C. Coppi, G. Deuter, F. von Feilitzsch, D. Hauff, S. Henry, P. Huff, J. Imber, S. Ingleby, C. Isaila, J. Jochum, M. Kiefer, M. Kimmerle, H. Kraus, J. -C. Lanfranchi, R. F. Lang, M. Malek, R. McGowan, V. B. Mikhailik, E. Pantic, F. Petricca, S. Pfister, W. Potzel, F. Pröbst, S. Roth, K. Rottler, C. Sailer, K. Schäffner, S. Scholl, W. Seidel, L. Stodolsky, A. J. B. Tolhurst, I. Usherov, W. Westphal

摘要:

CRESST实验旨在探测WIMP形式的暗物质。预期这些粒子从靶材料的核弹性散射,从而在反冲核上沉积能量。CRESST使用结晶CaWO4晶体作为这样的靶。由相互作用粒子沉积的能量主要被转换成声子,声子被跃迁边缘传感器检测到。此外,小部分的相互作用能量以闪烁光的形式从晶体发射,闪烁光与声子信号一致地由用于每个目标晶体的单独的低温光检测器测量。光与声子能量的比率允许区分WIMP预期的核反冲和主要导致电子反冲的放射性背景事件。CRESST在2007年的试运行中展示了这种方法的成功,从那时起,进一步研究了更好地抑制背景的可能性。在这里,我们报告在这项工作的过程中观察到的一类新的背景事件。这种观察的后果进行了讨论,我们目前的实验状态。

英文摘要:

The CRESST experiment aims for a detection of dark matter in the form of WIMPs. These particles are expected to scatter elastically off the nuclei of a target material, thereby depositing energy on the recoiling nucleus. CRESST uses scintillating CaWO4 crystals as such a target. The energy deposited by an interacting particle is primarily converted to phonons which are detected by transition edge sensors. In addition, a small fraction of the interaction energy is emitted from the crystals in the form of scintillation light which is measured in coincidence with the phonon signal by a separate cryogenic light detector for each target crystal. The ratio of light to phonon energy permits the discrimination between the nuclear recoils expected from WIMPs and events from radioactive backgrounds which primarily lead to electron recoils. CRESST has shown the success of this method in a commissioning run in 2007 and, since then, further investigated possibilities for an even better suppression of backgrounds. Here, we report on a new class of background events observed in the course of this work. The consequences of this observation are discussed and we present the current status of the experiment.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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