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	Natural X-ray lines from the low scale supersymmetry breaking
	Kang, ZF; Ko, P; Li, TJ; Liu, YD
刊名	PHYSICS LETTERS B
	2015
卷号	742期号:0页码:249-255
通讯作者	Kang, ZF (reprint author), Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China.
英文摘要	In the supersymmetric models with low scale supersymmetry (SUSY) breaking where the gravitino mass is around keV, we show that the 3.5 keV X-ray lines can be explained naturally through several different mechanisms: (I) a keV scale dark gaugino plays the role of sterile neutrino in the presence of bilinear R-parity violation. Because the light dark gaugino obtains Majorana mass only via gravity mediation, it is a decaying warm dark matter (DM) candidate; (II) the compressed cold DM states, whose mass degeneracy is broken by gravity mediated SUSY breaking, emit such a line via the heavier one decay into the lighter one plus photon(s). A highly supersymmetric dark sector may readily provide such kind of system; (III) the light axino, whose mass again is around the gravitino mass, decays to neutrino plus gamma in the R-parity violating SUSY. Moreover, we comment on dark radiation from dark gaugino. (C) 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license.
学科主题	Astronomy & Astrophysics ; Physics
类目[WOS]	Astronomy & Astrophysics ; Physics, Nuclear ; Physics, Particles & Fields
关键词[WOS]	COLD DARK-MATTER ; GLOBAL SYMMETRIES
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/21064]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Kang, ZF,Ko, P,Li, TJ,et al. Natural X-ray lines from the low scale supersymmetry breaking[J]. PHYSICS LETTERS B,2015,742(0):249-255.
APA	Kang, ZF,Ko, P,Li, TJ,&Liu, YD.(2015).Natural X-ray lines from the low scale supersymmetry breaking.PHYSICS LETTERS B,742(0),249-255.
MLA	Kang, ZF,et al."Natural X-ray lines from the low scale supersymmetry breaking".PHYSICS LETTERS B 742.0(2015):249-255.

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