超引力暴胀中宇宙弦张力的脉冲星约束
Evading the pulsar constraints on the cosmic string tension in supergravity inflation
摘要：
宇宙弦是早期宇宙的有用探测器，可能会给我们提供任何人造粒子加速器都无法到达的高能尺度的物理学线索。虽然最有希望的工具之一是宇宙微波背景，来自引力波的约束变得如此严格，人们可能不希望在宇宙微波背景中检测到它的签名。在本文中，我们构建了一个方案，其中包含宇宙弦观测的宇宙微波背景，同时回避了最近的脉冲星定时数据所施加的约束。我们认为，宇宙弦相对较大的张力是允许的延迟发病的标度制度。我们还表明，这种情况下自然实现的超重力，其中的相变的混沌暴胀的背景下，哈勃诱导质量。
英文摘要：
The cosmic string is a useful probe of the early Universe and may give us a clue to physics at high energy scales where any artificial particle accelerators cannot reach. Although one of the most promising tools is the cosmic microwave background, the constraint from gravitational waves is becoming so stringent that one may not hope to detect its signatures in the cosmic microwave background. In this paper, we construct a scenario that contains cosmic strings observable in the cosmic microwave background while evading the constraint imposed by the recent pulsar timing data. We argue that cosmic strings with relatively large tension are allowed by delaying the onset of the scaling regime. We also show that this scenario is naturally realized in the context of chaotic inflation in supergravity, where the phase transition is governed by the Hubble induced mass.
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