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arXiv 0806.2487hep-ex
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真空管中的电子-暗物质散射

Electron - Dark Matter Scattering in an Evacuated Tube

Yonatan Kahn, Michael Schmitt

摘要:

轻暗物质模型可以解释暗物质的原始丰度和来自银河系中心的异常511 keV伽马射线信号。该模型假定轻中性标量χ,其质量在1 MeV < Mchi < 10 MeV的范围内,以及轻中性自旋-1玻色子U,其介导湮灭通道χχ-> e+e-。由于暗物质粒子很轻,如果考虑到局部暗物质密度为0.3 GeV/cm ^3,那么它的数密度相对较大。我们考虑一个实验,其中一个低能量,高电流的电子束通过一个长的真空管,并观察到弹性散射的暗物质粒子的电子。该过程的运动学允许将信号过程与散射离开管中的残余气体完全分离,并且还允许直接测量Mchi。

英文摘要:

The light dark matter model can explain both the primordial abundance of dark matter and the anomalous 511 keV gamma-ray signal from the galactic center. This model posits a light neutral scalar, χ, with a mass in the range 1 MeV < Mchi < 10 MeV, as well as a light neutral spin-1 boson, U, which mediates the annihilation channel χχ-> e+e-. Since the dark matter particle is light, its number density is relatively large if it accounts for a local dark matter density of 0.3 GeV/cm^3. We consider an experiment in which a low-energy, high-current electron beam is passed through a long evacuated tube, and elastic scattering of electrons off dark matter particles is observed. The kinematics of this process allow a clean separation of the signal process from scattering off residual gas in the tube, and also a direct measurement of Mchi.

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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