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Searching for slow-developing cosmic-ray showers: Looking for evidence of exotic primaries at the Pierre Auger Observatory.

机译：寻找缓慢发展的宇宙射线阵雨：在皮埃尔·奥格天文台寻找奇异初生的证据。

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摘要

The central purpose of this research was to add the event propagation velocity to the list of shower parameters that the Florescence Detector of Pierre Auger Observatory is capable of measuring. This capability was then leveraged to differentiate exotic slow moving events from the rest of the cosmic ray flux. Clearly, by relativistic necessity, all known cosmic ray primaries can only cause a measurable extensive air shower at velocities indistinguishably close to the speed of light. Therefore any accurate observation of an event propagating slower than the speed of light would provide an unmistakable indicator of new physics.;A particle must possess very specific characteristics in order to be capable of producing a slow shower. High mass Strangelets, macroscopic dark matter, and super-symmetric Q-Balls were identified as strong candidates. Theory supporting high mass Strangelets and macroscopic dark matter appeared too late for full inclusion in this work, however super-symmetric Q-Balls were thoroughly examined. CORSIKA simulations were used to show that the fluorescence detector of the Pierre Auger Observatory has sensitivity to Q-Balls with a mass MQ > 3.25 x 1027 GeV c--2 while the surface detector is sensitive at a mass MQ > 1.15 x 10 27GeV c--2.;The Pierre Auger Observatory was shown to be capable of accurately measuring a wide range of velocities with two independent methods. These methods were applied to 7 years of data and one candidate slow event was identified. This candidate measurement proved to be due to a rare and interesting, but ultimately, non-exotic effect, which when accounted for resulted in the event being measured normally. As a result of this, no exotic candidate events were found in the search. Recommendations are made for improving the result and promising alternative search methods are presented.
机译：这项研究的主要目的是将事件传播速度添加到Pierre Auger天文台荧光检测器能够测量的淋浴参数列表中。然后，利用此功能来区分外来的慢速移动事件与其余的宇宙射线通量。显然，由于相对论的必要性，所有已知的宇宙射线原色只能在不可接近的光速下引起可测量的大范围的空气喷淋。因此，任何对传播速度慢于光速的事件的准确观察都将提供新物理学的明确指示。粒子必须具有非常特殊的特性才能产生缓慢的阵雨。高质量的Strangelets，宏观暗物质和超对称Q-Balls被确定为强候选者。支持高质量Strangelets和宏观暗物质的理论似乎为时已晚，无法完全包含在这项工作中，但是对超对称Q-Balls进行了全面研究。 CORSIKA仿真用于显示Pierre Auger天文台的荧光检测器对质量质量MQ> 3.25 x 1027 GeV c--2的Q球具有敏感性，而表面检测器对质量质量MQ> 1.15 x 10 27GeV c的质球敏感--2 .;皮埃尔·奥格天文台被证明能够使用两种独立的方法精确地测量各种速度。将这些方法应用于7年的数据，并确定了一个候选慢事件。事实证明，这种候选测量是由于罕见且有趣的，但最终是非外来效应造成的，如果考虑在内，该事件将被正常测量。结果，在搜索中未发现任何异常事件。提出了改善结果的建议，并提出了有希望的替代搜索方法。

著录项

  • 作者

    Mayotte, Eric William.;

  • 作者单位

    Colorado School of Mines.;

  • 授予单位 Colorado School of Mines.;
  • 学科 Astrophysics.;High energy physics.
  • 学位 Ph.D.
  • 年度 2016
  • 页码 256 p.
  • 总页数 256
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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