Constraints on the generalized natural inflation after Planck 2018  

作　　者：Nan Zhang Ya-Bo Wu Jun-Wang Lu Chu-Wen Sun Li-Jie Shou Hai-Zhou Xu 张楠;吴亚波;鲁军旺;孙楚雯;守丽杰;徐海洲(Department of Physics,Liaoning Normal University,Dalian 116029,China;School of Physics and Electronics,Qiannan Normal University for Nationalities,Duyun 558000,China)

机构地区：[1]Department of Physics,Liaoning Normal University,Dalian 116029,China [2]School of Physics and Electronics,Qiannan Normal University for Nationalities,Duyun 558000,China

出　　处：《Chinese Physics C》2020年第9期231-238,共8页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(11575075,11705079,11865012)。

摘　　要：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.

关 键 词：early universe INFLATION model of inflation observational tests of inflation REHEATING 

分 类 号：P159[天文地球—天文学]