کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1851128 | 1528821 | 2014 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Primordial gravitational wave of BICEP2 from dynamical double hybrid inflation Primordial gravitational wave of BICEP2 from dynamical double hybrid inflation](/preview/png/1851128.png)
BICEP2 has observed a primordial gravitational wave corresponding to the tensor-to-scalar ratio of 0.16. It seems to require a super-Planckian inflationary model. In this paper, we propose a double hybrid inflation model, where the inflaton potential dynamically changes with the evolution of the inflaton fields. During the first phase of inflation over 7 e-folds, the power spectrum can be almost constant by a large linear term in the hybrid potential, which is responsible also for the large tensor-to-scalar ratio. In the second phase of 50 e-folds, the dominant potential becomes dynamically changed to the logarithmic form as in the ordinary supersymmetric hybrid inflation, which is performed by the second inflaton field. In this model, the sub-Planckian field values (∼0.9 MP∼0.9 MP) can still yield the correct cosmic observations with the sufficient e-folds.
Journal: Physics Letters B - Volume 735, 30 July 2014, Pages 391–395