Flavor Structure of the Cosmic-Ray Electron/Positron Excesses at DAMPE

Flavor Structure of the Cosmic-Ray Electron/Positron Excesses at DAMPE
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DAMPE 宇宙射线电子/正电子过量的味道结构

DOI:
10.1016/j.physletb.2018.03.065
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发表时间:
2017-12
期刊:
影响因子:
4.4
通讯作者:
Yu-Cheng Wang
Yu-Cheng Wang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Shao-Feng Ge;Hong-Jian He;Yu-Cheng Wang

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摘要暗物质粒子探测器(DAMPE)卫星探测器宣布了其测量宇宙射线电子/正电子(CRE)能谱的第一个结果,最高可达4.6 TeV,包括在(1.3-1.5)TeV处的一个试探性峰值事件过剩。在这项工作中,我们发现了一个显着的隐藏过量的能量范围(0.6-1.1)TeV的DAMPE CRE光谱,它具有非峰状结构。我们提出了一个新的机制来解释这种过剩的一组1.5 TeV μ±事件,随后衰变成e± +中微子。为了解释这一新的过剩以及1.4TeV附近的峰值过剩,我们证明了由暗物质(DM)湮灭(或其他机制)产生的原始轻子末态的味结构应具有组成比Ne:(N μ+16 N τ)= 1:y,y = 2.6-10.8.对于轻子门DM模型,这对轻子-DM-介质耦合λ e:(λ μ 4+ 16 λ τ 4)14 = 1:y14施加了非平凡的约束,其中y14的范围很窄,为1.3-1.8.
Abstract The Dark Matter Particle Explorer (DAMPE) satellite detector announced its first result for measuring the cosmic-ray electron/positron (CRE) energy spectrum up to 4.6 TeV, including a tentative peak-like event excess at (1.3–1.5) TeV. In this work, we uncover a significant hidden excess in the DAMPE CRE spectrum over the energy range (0.6–1.1) TeV, which has a non-peak-like structure. We propose a new mechanism to explain this excess by a set of 1.5 TeV μ±events with subsequent decays into e±plus neutrinos. For explaining this new excess together with the peak excess around 1.4 TeV, we demonstrate that the flavor structure of the original lepton final-state produced by dark matter (DM) annihilations (or other mechanism) should have a composition ratio N e:(N μ+ 1 6 N τ)= 1: y, with y≃ 2.6–10.8. For lepton portal DM models, this puts nontrivial constraint on the lepton-DM-mediator couplings λ e:(λ μ 4+ 1 6 λ τ 4) 1 4= 1: y 1 4 with a narrow range y 1 4≃ 1.3–1.8.
DOI: --
发表时间: 2017-12
期刊: arXiv: High Energy Physics - Phenomenology
影响因子: --
作者:
Ran Ding;Zhi-Long Han;Lei Feng;B. Zhu
通讯作者: Ran Ding;Zhi-Long Han;Lei Feng;B. Zhu
DOI: 10.1016/j.physletb.2018.05.075
发表时间: 2018
期刊: Physics Letters B
影响因子: 4.4
作者:
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DAMPE 数据与 U(l) 规范相互作用的标量暗物质解释
DOI: 10.1103/physrevd.97.095011
发表时间: 2018
期刊: PHYSICAL REVIEW D
影响因子: 5
作者:
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DOI: 10.1016/j.physletb.2018.03.006
发表时间: 2017-12
期刊: Physics Letters B
影响因子: 4.4
作者:
A. Fowlie
通讯作者: A. Fowlie
DOI: 10.1063/1.4968898
发表时间: 2016-09
期刊: arXiv: High Energy Astrophysical Phenomena
影响因子: --
作者:
J. Holder
通讯作者: J. Holder