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
影响因子:
4.4
通讯作者:
ong
中科院分区:
文献类型:
--
作者:
Kang, Zhaofeng;Ko, P.;Li, Tianjun;Liu, Y;ong
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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