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arXiv 1612.09501hep-ph
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根据AMS-02反质子数据简化的暗物质模型

Simplified dark matter models in the light of AMS-02 antiproton data

Tong Li

摘要:

在这项工作中,我们进行了分析,最近AMS-02的反质子通量和反质子比的简化的暗物质模型的框架。为了预测AMS-02观测值,我们采用了由观测到的核通量确定的传播和注入参数。我们假设暗物质粒子是狄拉克费米子暗物质,具有疏轻子赝标或轴向矢量介体,仅耦合到标准模型夸克和暗物质粒子。我们发现AMS-02的观测结果在不确定性范围内与暗物质假说是一致的。在68%的置信水平下,对于赝标介质的湮灭,反质子数据倾向于暗物质(介质)质量在700 GeV-5 TeV之间,对于轴矢量介质的湮灭,反质子数据倾向于大于700 GeV(200 GeV-1 TeV)。AMS-02的数据要求在赝标量(轴向矢量)介质的简化模型中,有效的暗物质湮灭截面在1 × 10 ^{-25} --1 × 10 ^{-24}(1 × 10 ^{-25} --4 × 10 ^{-24})cm ^3/s范围内。本文还讨论了LHC和Fermi-LAT的限制。

英文摘要:

In this work we perform an analysis of the recent AMS-02 antiproton flux and the antiproton-to-proton ratio in the framework of simplified dark matter models. To predict the AMS-02 observables we adopt the propagation and injection parameters determined by the observed fluxes of nuclei. We assume that the dark matter particle is a Dirac fermionic dark matter, with leptophobic pseudoscalar or axialvector mediator that couples only to Standard Model quarks and dark matter particles. We find that the AMS-02 observations are consistent with the dark matter hypothesis within the uncertainties. The antiproton data prefer a dark matter (mediator) mass in the 700 GeV--5 TeV region for the annihilation with pseudoscalar mediator and greater than 700 GeV (200 GeV--1 TeV) for the annihilation with axialvector mediator, respectively, at about 68% confidence level. The AMS-02 data require an effective dark matter annihilation cross section in the region of 1x10^{-25} -- 1x10^{-24} (1x10^{-25} -- 4x10^{-24}) cm^3/s for the simplified model with pseudoscalar (axialvector) mediator. The constraints from the LHC and Fermi-LAT are also discussed.

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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