arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0906.1735astro-ph.HEastro-ph.COgr-qchep-phhep-th
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用超高能宇宙射线寻找新物理

Searching for New Physics with Ultrahigh Energy Cosmic Rays

Floyd W. Stecker, Sean T. Scully

摘要:

超高能宇宙射线在地球大气层中相互作用时产生巨大的带电粒子和光子簇射,为寻找新的物理学提供了独特的工具。特别令人感兴趣的是,探测到一个非常小的违反洛伦兹不变性的可能性,例如可能与$\sim 10^{-35}$ m普朗克尺度附近的时空结构有关。我们在这里讨论的可能签名的洛伦兹不变性破坏的频谱上的能量宇宙射线相比,目前的观测巨大的空气淋浴。我们还讨论了未来使用更灵敏的检测技术来改进洛伦兹不变性破坏搜索的可能性。使用最新的数据从皮埃尔俄歇天文台,我们得出一个最佳的拟合的LIV参数$3.0^{+1.5}_{-3.0} \times 10^{-23}$,对应的上限$4.5 \times 10^{-23}$在质子洛伦兹因子$\sim 2 \times 10^{11}$。这一结果对量子引力模型具有重要意义。

英文摘要:

Ultrahigh energy cosmic rays that produce giant extensive showers of charged particles and photons when they interact in the Earth's atmosphere provide a unique tool to search for new physics. Of particular interest is the possibility of detecting a very small violation of Lorentz invariance such as may be related to the structure of space-time near the Planck scale of $\sim 10^{-35}$m. We discuss here the possible signature of Lorentz invariance violation on the spectrum of ultrahigh energy cosmic rays as compared with present observations of giant air showers. We also discuss the possibilities of using more sensitive detection techniques to improve searches for Lorentz invariance violation in the future. Using the latest data from the Pierre Auger Observatory, we derive a best fit to the LIV parameter of $3.0^{+1.5}_{-3.0} \times 10^{-23}$, corresponding to an upper limit of $4.5 \times 10^{-23}$ at a proton Lorentz factor of $\sim 2 \times 10^{11}$. This result has fundamental implications for quantum gravity models.

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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