arXiv 1106.35832011-06hep-phastro-ph.COastro-ph.GAastro-ph.HE

疏光Z'与大统一中的暗物质

A Leptophobic Z' And Dark Matter From Grand Unification

Matthew R. Buckley, Dan Hooper, Jonathan L. Rosner

备注：: 6 pages, 2 figure
DOI：: 10.1016/j.physletb.2011.08.014

摘要：

我们探讨了基于E_6群的大统一模型的唯象学，重点讨论了这种模型中可能出现的与轻子耦合被抑制的Z'。我们发现，这个Z'可以容纳的W+dijets异常CDF合作报告。此外，在E_6的基本27维表象中，也存在一个右手超中微子形式的可行的暗物质候选者。通过其与Z '的相当大的耦合，预测暗物质具有与中子的弹性散射截面，这可以产生CoGeNT和DAMA/LIBRA合作报告的信号。在早期宇宙中，为了避免过度产生，暗物质必须通过交换带电或中性的费米子而湮灭为轻子，这些费米子出现在E_6的27中，与费米伽马射线太空望远镜从银河系中心观测到的伽马射线谱非常吻合。

英文摘要：

We explore the phenomenology of Grand Unified Models based on the E_6 group, focusing on the Z' with suppressed couplings to leptons that can appear in such models. We find that this Z' can accommodate the W+dijets anomaly reported by the CDF collaboration. Furthermore, a viable dark matter candidate in the form of a right-handed sneutrino is also present within the fundamental 27-dimensional representation of E_6. Through its sizable couplings to the Z', the dark matter is predicted to possess an elastic scattering cross section with neutrons which can generate the signals reported by the CoGeNT and DAMA/LIBRA collaborations. To avoid being overproduced in the early universe, the dark matter must annihilate to leptons through the exchange of charged or neutral fermions which appear in the 27 of E_6, providing an excellent fit to the gamma ray spectrum observed from the Galactic Center by the Fermi Gamma Ray Space Telescope.

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英文摘要：

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