论文标题
在规模不变的两个措施理论中即时预热
Instant preheating in a scale invariant two measures theory
论文作者
论文摘要
研究了规模不变的两个措施理论的即时预热机制。我们将这种机制引入非振荡通货膨胀模型，作为该理论中宇宙加热的另一种可能的解决方案。在此框架中，我们认为该模型包括两个标量物质字段，第一个标量字段是DILATON字段，它在比例转换下转换，并且也将被视为驱动通货膨胀的场，第二个场，第二个标量场将通过有效的潜力与Entraton相互作用。通过假设该相互作用项，我们根据域获得了即时辐射或粒子衰减的情况，该域与与充气量相互作用的场的有效质量。此外，我们考虑了尺度不变的Yukawa相互作用，然后在执行向物理爱因斯坦框架的过渡后，我们从标量场进入两个费米子的衰减速率的表达式。此外，从特定的衰减速率中，可以找到与模型相关的耦合参数的不同约束和边界。
The instant preheating mechanism in the framework of a scale invariant two measures theory is studied. We introduce this mechanism into a non oscillating inflationary model as another possible solution to the reheating of the universe in this theory. In this framework, we consider that the model includes two scalar matter fields, the first a dilaton field, that transforms under scale transformations and it will be considered also as the field that drives inflation and the second, a scalar field which will interact with the inflaton through an effective potential. By assuming this interaction term, we obtain a scenario of instant radiation or decay of particles according to the domain the effective mass of the field that interacts with the inflaton. Also, we consider a scale invariant Yukawa interaction and then after performing the transition to the physical Einstein frame we obtain an expression for the decay rate from our scalar field going into two fermions. Besides, from specific decay rates, different constraints and bounds for the coupling parameters associated with our model are found.
