期刊論文
| 學年 | 103 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2014-11-26 |
| 作品名稱 | Naturally large tensor-to-scalar ratio in inflation |
| 作品名稱（其他語言） | |
| 著者 | Guo-Chin Liu; Kin-Wang Ng; I-Chin Wang |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Physical Review D 90(10), 103531(6 pages) |
| 摘要 | Recently, BICEP2 measurements of the cosmic microwave background (CMB) B -mode polarization at degree angular scales has indicated the presence of tensor modes with a high tensor-to-scalar ratio of r = 0.2 when assuming nearly scale-invariant tensor and scalar spectra, although the signal may be contaminated by dust emission, as implied by recent Planck polarization data. This result is in conflict with the Planck best-fit lambda cold dark model with r < 0.11 . Because the inflaton has to interact with other fields to convert its potential energy into radiation to reheat the Universe, the interacting inflaton may result in a suppression of the scalar spectrum at large scales. This suppression has been used to explain the observed low quadrupole in the CMB anisotropy. In this paper, we show that a combination of the tensor modes measured by BICEP2 and the large-scale suppressed scalar modes contributes to the CMB anisotropy in such a way that the resultant CMB anisotropy and polarization power spectra are consistent with both Planck and BICEP2 data. We also project our findings to cases in which r may become reduced in future CMB polarization measurements. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 1550-7998 |
| 期刊性質 | 國外 |
| 收錄於 | |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/111962 ) |