运动学阻塞曲率
Kinematically Blocked Curvaton
摘要：
在本文中，我们调查的想法，一个曲率衰变是运动学阻塞，并表明曲率衰变的耦合常数可以大到${\cal O}(1)$。我们还发现在这种情况下，大爆炸核合成（BBN）视界出口处的哈勃参数的下界是$H_\ast \gae 7.2 \times 10^{-9}M_P \sim 10^{10} {GeV}$。与传统的曲率情况类似，非线性参数可以大到$f_{NL}=100$。
英文摘要：
In this paper, we investigate the idea that the decay of a curvaton is kinematically blocked and show that the coupling constant for curvaton decay can be as large as ${\cal O}(1)$. We also find in this case the lower bound of the Hubble parameter at horizon exit from big bang nucleosynthesis (BBN) is $H_\ast \gae 7.2 \times 10^{-9}M_P \sim 10^{10} {GeV}$. Similar to conventional curvaton scenario, the nonlinear parameter can be as large as $f_{NL}=100$.
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