Natural X-ray lines from the low scale supersymmetry breaking

Natural X-ray lines from the low scale supersymmetry breaking
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来自低尺度超对称破缺的自然 X 射线线

DOI:
10.1016/j.physletb.2015.01.040
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发表时间:
2014-03
期刊:
影响因子:
4.4
通讯作者:
ong
ong
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Kang, Zhaofeng;Ko, P.;Li, Tianjun;Liu, Y;ong

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在引力子质量约为keV的低尺度超对称破缺超对称模型中,我们证明了3.5 keV x射线线可以通过几种不同的机制自然地解释:(1)在双线性r -奇偶性违反存在的情况下,keV尺度暗高介子扮演无菌中微子的角色。由于轻暗高介子仅通过引力中介获得马约拉纳质量,因此它是衰变热暗物质(DM)的候选者;(II)压缩的冷DM态,其质量简并被重力介导的超对称性破缺所打破,通过较重的一个衰变成较轻的一个加光子发射出这样一条线。一个高度超对称的暗扇区可能很容易提供这样的系统;(III)轻轴子,其质量也在引力子质量周围,在违反超对称性的ther宇称中衰变为中微子加伽马。此外,我们还对暗子的暗辐射进行了评述。
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 bilinearR-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 theR-parity violating SUSY. Moreover, we comment on dark radiation from dark gaugino.
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