arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1704.01577hep-phastro-ph.GAastro-ph.HEastro-ph.IMhep-ex
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中子星的暗动力学加热和WIMP、SIMPs和纯希格斯玻色子的红外窗口

Dark Kinetic Heating of Neutron Stars and An Infrared Window On WIMPs, SIMPs, and Pure Higgsinos

Masha Baryakhtar, Joseph Bramante, Shirley Weishi Li, Tim Linden, Nirmal Raj

摘要:

我们确定了一个很大程度上独立于模型的暗物质与核子和电子的相互作用的签名。星系晕中的暗物质,在引力作用下加速到光速的一半以上,向中子星散射,并将动能储存到中子星中,将中子星加热到红外黑体温度。由此产生的辐射可能会被詹姆斯韦伯太空望远镜,三十米望远镜或欧洲极大望远镜探测到。这种机制也会产生星系核球中中子星的光辐射,以及星系中心附近的X射线辐射,因为这些区域的暗物质密度更大。对于GeV-PeV质量的暗物质,暗动力学加热最初会暴露任何自旋无关或自旋相关的暗物质-核子截面超过$2 \times 10^{-45}$ cm $^2$,在更多的望远镜曝光后,灵敏度会提高。对于轻于GeV的暗物质,由于泡利阻塞,截面灵敏度与暗物质质量成反比;对于重于PeV的暗物质,由于需要多个散射体来捕获,截面灵敏度与质量成线性比例。未来对暗区加热的中子星的观测可以确定暗物质是在中子星中湮灭还是仅仅动力学加热。由于在相对论性的核子散射中会发生高达几个GeV的非弹性态间跃迁,因此也可以发现像纯希格斯玻色子那样难以捉摸的非弹性暗物质。

英文摘要:

We identify a largely model-independent signature of dark matter interactions with nucleons and electrons. Dark matter in the local galactic halo, gravitationally accelerated to over half the speed of light, scatters against and deposits kinetic energy into neutron stars, heating them to infrared blackbody temperatures. The resulting radiation could potentially be detected by the James Webb Space Telescope, the Thirty Meter Telescope, or the European Extremely Large Telescope. This mechanism also produces optical emission from neutron stars in the galactic bulge, and X-ray emission near the galactic center, because dark matter is denser in these regions. For GeV - PeV mass dark matter, dark kinetic heating would initially unmask any spin-independent or spin-dependent dark matter-nucleon cross-sections exceeding $2 \times 10^{-45}$ cm$^2$, with improved sensitivity after more telescope exposure. For lighter-than-GeV dark matter, cross-section sensitivity scales inversely with dark matter mass because of Pauli blocking; for heavier-than-PeV dark matter, it scales linearly with mass as a result of needing multiple scatters for capture. Future observations of dark sector-warmed neutron stars could determine whether dark matter annihilates in or only kinetically heats neutron stars. Because inelastic inter-state transitions of up to a few GeV would occur in relativistic scattering against nucleons, elusive inelastic dark matter like pure Higgsinos can also be discovered.

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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