arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1902.09084hep-ph
收藏

纯引力中介中的极小SU(5)SuperGUT

A Minimal SU(5) SuperGUT in Pure Gravity Mediation

Jason L. Evans, Natsumi Nagata, Keith A. Olive

摘要:

缺乏低尺度超对称性的证据表明,超对称性破缺的尺度可能比最初预期的要高。然而,超对称性仍然有许多动机,包括规范耦合统一和稳定的暗物质候选者。像纯引力中介(PGM)这样的模型避开了大型强子对撞机的搜索,同时仍然提供了一个很好的暗物质候选者和规范耦合统一。在这里,我们研究了PGM的影响,如果软超对称破缺质量的输入边界条件被推到统一尺度之外,并包括高维算子。通过放松对$\tanβ$的约束,在统一尺度之外增加的运行打开了参数空间。如果包含SU(5)伴随希格斯粒子的高维算符,SU(5)的重规范玻色子的质量可以被抑制,导致质子衰变,$p\to π^0 e^+$,这在未来的实验中是可以实现的。涉及超对称破缺场的高维算符可以对$m_{3/2}$级的A项和B项产生额外的贡献。涉及这些A项和B项的阈值效应显著地影响高吉诺的质量,并且可以导致双LSP。在参数空间的某些区域中,双星可以与维诺或胶子简并,并给出可接受的暗物质残余密度。

英文摘要:

The lack of evidence for low-scale supersymmetry suggests that the scale of supersymmetry breaking may be higher than originally anticipated. However, there remain many motivations for supersymmetry including gauge coupling unification and a stable dark matter candidate. Models like pure gravity mediation (PGM) evade LHC searches while still providing a good dark matter candidate and gauge coupling unification. Here, we study the effects of PGM if the input boundary conditions for soft supersymmetry breaking masses are pushed beyond the unification scale and higher dimensional operators are included. The added running beyond the unification scale opens up the parameter space by relaxing the constraints on $\tanβ$. If higher dimensional operators involving the SU(5) adjoint Higgs are included, the mass of the heavy gauge bosons of SU(5) can be suppressed leading to proton decay, $p\to π^0 e^+$, that is within reach of future experiments. Higher dimensional operators involving the supersymmetry breaking field can generate additional contributions to the A- and B-terms of order $m_{3/2}$. The threshold effects involving these A- and B-terms significantly impact the masses of the gauginos and can lead to a bino LSP. In some regions of parameter space the bino can be degenerate with the wino or gluino and give an acceptable dark matter relic density.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑