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Constraints on the generalized natural inflation after Planck 2018
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作者 Nan Zhang Ya-Bo Wu +3 位作者 Jun-Wang Lu chu-wen sun Li-Jie Shou Hai-Zhou Xu 《Chinese Physics C》 SCIE CAS CSCD 2020年第9期231-238,共8页
Based on the dynamics of single scalar field slow-roll inflation and the theory of reheating,we investigate the generalized natural inflationary(GNI)model.We introduce constraints on the scalar spectral index ns and t... Based on the dynamics of single scalar field slow-roll inflation and the theory of reheating,we investigate the generalized natural inflationary(GNI)model.We introduce constraints on the scalar spectral index ns and the tensor-to scalar ratio r for theΛCDM+r model,according to the latest data from Planck 2018 TT,TE,EE+low E+lensing(P18)and BICEP2/Keck 2015 season(BK15),i.e.,with ns=0.9659±0.0044 at 68%confidence level(CL),and r<0.0623 at 95%CL.We find that the GNI model is favored by P18 and BK15 in the ranges log10(f/Mp)=0.62^+0.17−0.18 and m=0.35^+0.13−0.23 at 68%CL.In addition,the corresponding predictions of generalized and two-phase reheating are discussed.It follows that the parameter m has significant effect on the model behavior. 展开更多
关键词 early universe INFLATION model of inflation observational tests of inflation REHEATING
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