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What can we learn from the tension between PLANCK and BICEP2 data?
Li H(李虹); Xia JQ(夏俊卿); Zhang XM(张新民)
2014
发表期刊中国科学(物理学·力学·天文学)(英文版)
期号8页码:1431-1441
摘要Recently BICEP2 collaboration has announced the detection of the primordial gravitational waves at high confidence level.In light of the results of B-modes power spectrum from BICEP2 and using the basedΛCDM,a constraint on the tensor-to-scalar ratio r=0.20+0.07-0.05(68%C.L.)can be obtained,however,this result is in apparent tension with the limit on standard inflation models from the recent PLANCK measurement,r<0.11(95%C.L.).Herein we review the recent progress on the cosmological studies after BICEP2 and discuss on different ways of reconciling the tension between PLANCK and BICEP2 data.We will discuss possible modifications on the standard cosmological model,such as including the running of scalar spectral index or other cosmological parameters correlated with inflationary cosmological parameters,or tilting the primordial power spectrum at large scales by introducing a cut off which can be predicted by bouncing cosmology.We will also comment on another possibility of generating extra B-modes of CMB polarization,namely by a non-zero polarization rotation angle during its transferring from the last scattering surface.
关键词LI Hong Chinese Academy of Science Chinese Academy of Sciences University of Science and Technology of China Central China Normal University University of Chinese Academy of Sciences LI MingZhe National Astronomical Observatories Interdisciplinary Center for Theoretical Study Institute of Astrophysics School of Physics Theoretical Physics Division QIU TaoTao XIA JunQing PIAO YunSong ZHANG XinMin(Key Laboratory of Particle Astrophysics Institute of High Energy Physics Institute of High Energy Physics Chinese Academy of Sciences)
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/218080
专题粒子天体物理中心
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Li H,Xia JQ,Zhang XM. What can we learn from the tension between PLANCK and BICEP2 data?[J]. 中国科学(物理学·力学·天文学)(英文版),2014(8):1431-1441.
APA 李虹,夏俊卿,&张新民.(2014).What can we learn from the tension between PLANCK and BICEP2 data?.中国科学(物理学·力学·天文学)(英文版)(8),1431-1441.
MLA 李虹,et al."What can we learn from the tension between PLANCK and BICEP2 data?".中国科学(物理学·力学·天文学)(英文版) .8(2014):1431-1441.
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