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arXiv 1507.08991astro-ph.HEastro-ph.IM
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两个Askaryan射电阵列站的性能和搜寻超高能中微子的初步结果

Performance of two Askaryan Radio Array stations and first results in the search for ultra-high energy neutrinos

ARA Collaboration, P. Allison, R. Bard, J. J. Beatty, D. Z. Besson, C. Bora, C. -C. Chen, C. -H. Chen, P. Chen, A. Christenson, A. Connolly, J. Davies, M. Duver… 展开作者

ARA Collaboration, P. Allison, R. Bard, J. J. Beatty, D. Z. Besson, C. Bora, C. -C. Chen, C. -H. Chen, P. Chen, A. Christenson, A. Connolly, J. Davies, M. Duvernois, B. Fox, R. Gaior, P. W. Gorham, K. Hanson, J. Haugen, B. Hill, K. D. Hoffman, E. Hong, S. -Y. Hsu, L. Hu, J. -J. Huang, M. -H. A. Huang, A. Ishihara, A. Karle, J. L. Kelley, D. Kennedy, I. Kravchenko, T. Kuwabara, H. Landsman, A. Laundrie, C. -J. Li, T. C. Liu, M. -Y. Lu, L. Macchiarulo, K. Mase, T. Meures, R. Meyhandan, C. Miki, R. Morse, J. Nam, R. J. Nichol, G. Nir, A. Novikov, A. O'Murchadha, C. Pfendner, K. Ratzlaff, M. Relich, M. Richman, L. Ritter, B. Rotter, P. Sandstrom, P. Schellin, A. Shultz, D. Seckel, Y. -S. Shiao, J. Stockham, M. Stockham, J. Touart, G. S. Varner, M. -Z. Wang, S. -H. Wang, Y. Yang, S. Yoshida, R. Young

摘要:

超高能中微子是有趣的信使粒子,因为如果被探测到,它们可以传递有关宇宙中超高能过程的独家信息。这些能量高于$10^{16}\mathrm{eV}$的粒子很少相互作用。因此,需要能够探测到数十亿吨物质的探测器来发现它们。ARA探测器目前正在南极建造。它的设计目的是利用阿斯卡里安效应,即南极冰中中微子诱导级联发射的无线电波,探测高能中微子相互作用。通过将天线分布在冰中37个相距甚远的站中,可以在数百立方公里的体积内观察到这种相互作用。目前,在冰层中部署了3个深层ARA站,其中两个站自2013年初以来一直在收集数据。在该出版物中,描述了ARA检测器“竣工”和校准。此外,数据处理方法,用于区分罕见的无线电信号压倒性的背景的热和人为起源。利用两个站在10个月的短曝光时间内的数据,计算出粒子能量为10^{18}eV时的中微子通量极限为$3 \cdot 10^{-6} \mathrm{GeV} / (\mathrm{cm^2 \ s \ sr})$,这为完整的ARA探测器提供了希望。

英文摘要:

Ultra-high energy neutrinos are interesting messenger particles since, if detected, they can transmit exclusive information about ultra-high energy processes in the Universe. These particles, with energies above $10^{16}\mathrm{eV}$, interact very rarely. Therefore, detectors that instrument several gigatons of matter are needed to discover them. The ARA detector is currently being constructed at South Pole. It is designed to use the Askaryan effect, the emission of radio waves from neutrino-induced cascades in the South Pole ice, to detect neutrino interactions at very high energies. With antennas distributed among 37 widely-separated stations in the ice, such interactions can be observed in a volume of several hundred cubic kilometers. Currently 3 deep ARA stations are deployed in the ice of which two have been taking data since the beginning of the year 2013. In this publication, the ARA detector "as-built" and calibrations are described. Furthermore, the data reduction methods used to distinguish the rare radio signals from overwhelming backgrounds of thermal and anthropogenic origin are presented. Using data from only two stations over a short exposure time of 10 months, a neutrino flux limit of $3 \cdot 10^{-6} \mathrm{GeV} / (\mathrm{cm^2 \ s \ sr})$ is calculated for a particle energy of 10^{18}eV, which offers promise for the full ARA detector.

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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