标题： 原始磁单极子，质子衰变，引力波和大统一理论暴胀 显示英文标题

标题： Primordial monopoles, proton decay, gravity waves and GUT inflation

摘要： 我们考虑非超对称GUT暴胀模型，在这些模型中，由于伴随的对称性破缺经历的e-foldings数量有限，中间质量单极子可能在暴胀后存活下来。 因此，银河系中可能存在可观测的原初磁单极子通量，其水平与帕克极限相当或低几个数量级。 与中间对称性破缺相关的质量尺度为$10^{13}$GeV，相应的单极子质量大约重一个数量级。 基于$SO(10)$和$E_6$的例子会产生这样的中间质量单极子，分别携带两个和三个单位的狄拉克磁荷。 对于由一个规范单态标量场驱动的GUT暴胀，其势能为Coleman-Weinberg或希格斯势，与普朗克对标量谱指数的测量相容，暴胀期间宇宙尺度退出视界时的哈勃常数为$H \sim 7$--$9\times10^{13}$GeV，张量与标量比值$r$预测为$\gtrsim0.02$。 还提供了通过超重规范玻色子介导的质子衰变寿命估计。 显示英文摘要

摘要： We consider non-supersymmetric GUT inflation models in which intermediate mass monopoles may survive inflation because of the restricted number of e-foldings experienced by the accompanying symmetry breaking. Thus, an observable flux of primordial magnetic monopoles, comparable to or a few orders below the Parker limit, may be present in the galaxy. The mass scale associated with the intermediate symmetry breaking is $10^{13}$ GeV for an observable flux level, with the corresponding monopoles an order of magnitude or so heavier. Examples based on $SO(10)$ and $E_6$ yield such intermediate mass monopoles carrying respectively two and three units of Dirac magnetic charge. For GUT inflation driven by a gauge singlet scalar field with a Coleman-Weinberg or Higgs potential, compatibility with the Planck measurement of the scalar spectral index yields a Hubble constant (during horizon exit of cosmological scales) $H \sim 7$--$9\times10^{13}$ GeV, with the tensor to scalar ratio $r$ predicted to be $\gtrsim0.02$. Proton lifetime estimates for decays mediated by the superheavy gauge bosons are also provided.