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arXiv 1209.5702hep-phastro-ph.COastro-ph.HE
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来自天空的基础物理学:宇宙射线、伽马射线和对暗物质的搜寻

Fundamental Physics from the Sky: Cosmic Rays, Gamma Rays and the Hunt for Dark Matter

Stefano Profumo

摘要:

我们能从天文学和天体粒子数据中了解新物理学吗?理解这是如何可能的是解开宇宙学和粒子物理学界面上最紧迫的谜团之一的关键:暗物质的基本性质。我将讨论最近在宇宙射线电子-正电子数据和伽马射线观测中的一些令人困惑的发现,这些发现可能与暗物质有关。我认为,最近的宇宙射线数据,特别是来自帕梅拉和费米卫星的数据,表明银河系中以前无法解释的强大来源注入了高能电子和正电子。有趣的是,这种新的源类可能与新的基本粒子物理学有关,特别是与星系暗物质的成对湮灭或衰变有关。这种令人兴奋的情况直接受到费米伽马射线观测的限制,这也告诉我们天体物理源对应物也可能是高能电子-正电子过剩的原因。对银河系中心区域伽马射线发射的观测以及对130 GeV左右伽马射线线的断言最近也引发了广泛的兴趣:我将讨论我们是否真的观测到了来自暗物质湮灭的信号,如何检验这一假设,以及哪些天体物理机制构成了相关的背景。

英文摘要:

Can we learn about New Physics with astronomical and astro-particle data? Understanding how this is possible is key to unraveling one of the most pressing mysteries at the interface of cosmology and particle physics: the fundamental nature of dark matter. I will discuss some of the recent puzzling findings in cosmic-ray electron-positron data and in gamma-ray observations that might be related to dark matter. I will argue that recent cosmic-ray data, most notably from the Pamela and Fermi satellites, indicate that previously unaccounted-for powerful sources in the Galaxy inject high-energy electrons and positrons. Interestingly, this new source class might be related to new fundamental particle physics, and specifically to pair-annihilation or decay of galactic dark matter. This exciting scenario is directly constrained by Fermi gamma-ray observations, which also inform us on astrophysical source counterparts that could also be responsible for the high-energy electron-positron excess. Observations of gamma-ray emission from the central regions of the Galaxy as well as claims on a gamma-ray line at around 130 GeV also recently triggered a wide-spread interest: I will address the question of whether we are really observing signals from dark matter annihilation, how to test this hypothesis, and which astrophysical mechanisms constitute the relevant background.

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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