What can we learn from the tension between PLANCK and BICEP2 data?; 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 ; 2014  
Source Publication  SCIENCE CHINAPHYSICS MECHANICS & ASTRONOMY ; SCIENCE CHINAPHYSICS MECHANICS & ASTRONOMY 
Issue  8Pages:14311441 
Abstract  Recently BICEP2 collaboration has announced the detection of the primordial gravitational waves at high confidence level.In light of the results of Bmodes power spectrum from BICEP2 and using the basedΛCDM,a constraint on the tensortoscalar ratio r=0.20+0.070.05(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 Bmodes of CMB polarization,namely by a nonzero polarization rotation angle during its transferring from the last scattering surface.; Recently BICEP2 collaboration has announced the detection of the primordial gravitational waves at high confidence level.In light of the results of Bmodes power spectrum from BICEP2 and using the basedΛCDM,a constraint on the tensortoscalar ratio r=0.20+0.070.05(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 Bmodes of CMB polarization,namely by a nonzero polarization rotation angle during its transferring from the last scattering surface. 
Keyword  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 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 LI MingZhe National Astronomical Observatories Interdisciplinary Center for Theoretical Study Institute of Astrophysics School of Physics Theoretical Physics Division QIU TaoTao QIU TaoTao XIA JunQing XIA JunQing PIAO YunSong PIAO YunSong ZHANG XinMin（Key Laboratory of Particle Astrophysics ZHANG XinMin（Key Laboratory of Particle Astrophysics Institute of High Energy Physics Institute of High Energy Physics Institute of High Energy Physics Institute of High Energy Physics Chinese Academy of Sciences） Chinese Academy of Sciences） 
Indexed By  SCI ; ADS ; ADS ; ADS ; SCI ; ADS ; ADS 
Language  英语 ; 英语 
WOS ID  WOS:000339365800003 ; WOS:000339365800003 
ADS Bibcode  2014SCPMA..57.1431L ; 2014SCPMA..57.1431L 
ADS URL  https://ui.adsabs.harvard.edu/abs/2014SCPMA..57.1431L ; https://ui.adsabs.harvard.edu/abs/2014SCPMA..57.1431L 
ADS CITATIONS  https://ui.adsabs.harvard.edu/abs/2014SCPMA..57.1431L/citations ; https://ui.adsabs.harvard.edu/abs/2014SCPMA..57.1431L/citations 
Citation statistics 
Cited Times:9 [ADS]

Document Type  期刊论文 
Identifier  http://ir.ihep.ac.cn/handle/311005/218080 
Collection  粒子天体物理中心 
Recommended Citation GB/T 7714  Li H,Xia JQ,Zhang XM. What can we learn from the tension between PLANCK and BICEP2 data?, What can we learn from the tension between PLANCK and BICEP2 data?[J]. SCIENCE CHINAPHYSICS MECHANICS & ASTRONOMY, SCIENCE CHINAPHYSICS MECHANICS & ASTRONOMY,2014, 2014(8):14311441, 14311441. 
APA  李虹,夏俊卿,&张新民.(2014).What can we learn from the tension between PLANCK and BICEP2 data?.SCIENCE CHINAPHYSICS MECHANICS & ASTRONOMY(8),14311441. 
MLA  李虹,et al."What can we learn from the tension between PLANCK and BICEP2 data?".SCIENCE CHINAPHYSICS MECHANICS & ASTRONOMY .8(2014):14311441. 
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