Dev P S Bhupal, Mohapatra R N
Consortium for Fundamental Physics, School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom.
Physik Department T30d, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany.
Phys Rev Lett. 2015 Oct 30;115(18):181803. doi: 10.1103/PhysRevLett.115.181803.
We show that the excess events observed in a number of recent LHC resonance searches can be simultaneously explained within a nonsupersymmetric left-right inverse seesaw model for neutrino masses with W_{R} mass around 1.9 TeV. The minimal particle content that leads to gauge coupling unification in this model predicts g_{R}≃0.51 at the TeV scale, which is consistent with data. The extra color singlet, SU(2)-triplet fermions required for unification can be interpreted as the dark matter of the Universe. Future measurements of the ratio of same-sign to opposite-sign dilepton events can provide a way to distinguish this scenario from the canonical cases of type-I and inverse seesaw, i.e., provide a measure of the relative magnitudes of the Dirac and Majorana masses of the right-handed neutrinos in the SU(2)_{R} doublet of the left-right symmetric model.
我们表明，在一些近期大型强子对撞机（LHC）共振搜索中观测到的过量事件，在一个用于中微子质量的非超对称左右逆跷跷板模型中可以同时得到解释，其中(W_R)质量约为1.9 TeV。该模型中导致规范耦合统一的最小粒子内容预测在TeV尺度下(g_R\approx0.51)，这与数据相符。统一所需的额外色单态、(SU(2))三重态费米子可被解释为宇宙的暗物质。未来对同号与异号双轻子事件比率的测量，可以提供一种方法将这种情形与I型和逆跷跷板的典型情况区分开来，即提供一种测量左右对称模型(SU(2)_R)双重态中右手型中微子的狄拉克质量和马约拉纳质量相对大小的手段。
