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题名: Confronting brane inflation with Planck and pre-Planck data
作者: Ma, YZ ;  Huang, QG ;  Zhang, X
刊名: PHYSICAL REVIEW D
出版日期: 2013
卷号: 87, 期号:10, 页码:103516
关键词: FLATNESS ;  UNIVERSE ;  HORIZON
学科分类: Physics
通讯作者: Ma, YZ (reprint author), Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada.
部门归属: [Ma, Yin-Zhe] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada; [Ma, Yin-Zhe] Canadian Inst Theoret Astrophys, Toronto M5S 3H8, ON, Canada; [Huang, Qing-Guo] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China; [Zhang, Xin] Northeastern Univ, Coll Sci, Shenyang 110004, Peoples R China; [Zhang, Xin] Peking Univ, Ctr High Energy Phys, Beijing 100080, Peoples R China
英文摘要: In this paper, we compare brane inflation models with the Planck data and the pre-Planck data (which combines WAMP, ACT, SPT, BAO and H-0 data). The Planck data prefer a spectral index less than unity at more than 5 sigma confidence level, and a running of the spectral index at around 2 sigma confidence level. We find that the KKLMMT model can survive at the level of 2 sigma only if the parameter beta (the conformal coupling between the Hubble parameter and the inflaton) is less than O(10(-3)), which indicates a certain level of fine-tuning. The IR DBI model can provide a slightly larger negative running of spectral index and red tilt, but in order to be consistent with the non-Gaussianity constraints from Planck, its parameter also needs fine-tuning at some level.
资助者: CITA National Fellowship; Natural Science and Engineering Research Council of Canada; Knowledge Innovation Program of the Chinese Academy of Science; National Natural Science Foundation of China [10821504, 10705041, 10975032, 11175042]; National Ministry of Education of China [NCET-09-0276, N100505001, N120505003]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000319254500003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15360
Appears in Collections:理论物理所2013年知识产出 _期刊论文

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Recommended Citation:
Ma, YZ,Huang, QG,Zhang, X. Confronting brane inflation with Planck and pre-Planck data[J]. PHYSICAL REVIEW D,2013,87(10):103516.
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