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arXiv 1805.07367hep-phastro-ph.HE
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暗物质湮灭TeV的高能$γ$ -射线图解

Energetic $γ$-rays from TeV scale dark matter annihilation resummed

M. Beneke, A. Broggio, C. Hasner, M. Vollmann

摘要:

TeV尺度暗物质粒子$χ^0$的湮灭截面与电弱电荷到光子的影响,由于大的量子修正的Sudakov模型和索末菲效应。采用纯Wino模型,在电弱微扰展开的全阶求和下,计算了$χ^0χ^0\to γ+X$在最大光子能量$E_γ= m_χ$附近的半包含光子能谱,其精度达到NLL.这导致在最精确的理论预测的湮灭率的$γ$射线望远镜的光子能量分辨率的参数顺序$m_W^2/m_χ$的光子与TeV的能量。

英文摘要:

The annihilation cross section of TeV scale dark matter particles $χ^0$ with electroweak charges into photons is affected by large quantum corrections due to Sudakov logarithms and the Sommerfeld effect. We calculate the semi-inclusive photon energy spectrum in $χ^0χ^0\to γ+X$ in the vicinity of the maximal photon energy $E_γ= m_χ$ with NLL' accuracy in an all-order summation of the electroweak perturbative expansion adopting the pure wino model. This results in the most precise theoretical prediction of the annihilation rate for $γ$-ray telescopes with photon energy resolution of parametric order $m_W^2/m_χ$ for photons with TeV energies.

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