标题： 双杂化暴胀与引力波 显示英文标题

标题： Double hybrid inflation and gravitational waves

摘要： 在非最小超引力中提出了一种双杂化暴胀情景，它可以预测张量-标量比值高达约 0.05 的值。这个比值的更大值将需要无法接受的大尺度谱指数漂移。 对于所选择的参数值，潜在的超对称粒子物理模型实际上具有两条暴胀路径，即平凡路径和半偏移路径。平凡路径由超引力稳定，并支持第一阶段暴胀，其膨胀因子数量有限。通过超引力效应与暴胀势的强辐射修正之间的竞争，张量-标量比值可以变得显著，而标量谱指数仍然可接受。 为了解决大爆炸宇宙学中的难题所需的额外膨胀因子数量由沿半偏移路径的第二阶段暴胀产生。这只有在半偏移路径几乎正交于平凡路径且不受平凡路径上强辐射修正影响，并且超引力效应仍然较温和的情况下才有可能。 该模型预测了不稳定开放宇宙弦网络的形成，这些弦连接单极子和反单极子。这个网络在复合之前衰变为引力波，可能导致未来基于太空的激光干涉引力波探测器中可能检测到的信号。 显示英文摘要

摘要： A double hybrid inflationary scenario in non-minimal supergravity which can predict values of the tensor-to-scalar ratio up to about 0.05 is presented. Larger values of this ratio would require unacceptably large running of the scalar spectral index. The underlying supersymmetric particle physics model possesses, for the chosen values of the parameters, practically two inflationary paths, the trivial and the semi-shifted one. The trivial path is stabilized by supergravity and supports a first stage of inflation with a limited number of e-foldings. The tensor-to-scalar ratio can become appreciable with the scalar spectral index remaining acceptable, as a result of the competition between the relatively mild supergravity and the strong radiative corrections to the inflationary potential. The additional number of e-foldings required for solving the puzzles of hot big bang cosmology are generated by a second stage of inflation along the semi-shifted path. This is possible only because the semi-shifted path is almost orthogonal to the trivial one and, thus, not affected by the strong radiative corrections on the trivial path and also because the supergravity effects remain mild. The model predicts the formation of an unstable network of open cosmic strings connecting monopoles to antimonopoles. This network decays to gravity waves well before recombination leading to possibly detectable signatures in future space-based laser interferometer gravitational-wave detectors.