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ファイル | 記述 | サイズ | フォーマット | |
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j.physletb.2011.12.018.pdf | 135.92 kB | Adobe PDF | 見る/開く |
タイトル: | CMB fluctuations and string compactification scales |
著者: | Habara, Yoshinobu Kawai, Hikaru Ninomiya, Masao Sekino, Yasuhiro |
著者名の別形: | 羽原, 由修 |
キーワード: | String theory Compactification scale Cosmic microwave background |
発行日: | Jan-2012 |
出版者: | Elsevier B.V. |
誌名: | Physics Letters B |
巻: | 707 |
号: | 1 |
開始ページ: | 198 |
終了ページ: | 202 |
抄録: | We propose a mechanism for the generation of temperature fluctuations of cosmic microwave background. We consider a large number of fields, such as Kaluza–Klein modes and string excitations. Each field contributes to the gravitational potential by a small amount, but an observable level of temperature fluctuations is achieved by summing up the contribution of typically of order 10[14] fields. Tensor fluctuations are hardly affected by these fields. Our mechanism is based on purely quantum effects of the fields which are classically at rest, and is different from the one in slow-roll inflation. Using the observed data, we find constraints on the parameters of this model, such as the size of the extra dimensions and the string scale. Our model predicts a particular pattern of non-gaussianity with a small magnitude. |
著作権等: | © 2011 Elsevier B.V. This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/152999 |
DOI(出版社版): | 10.1016/j.physletb.2011.12.018 |
出現コレクション: | 学術雑誌掲載論文等 |
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