Chaotic inflation,radiative corrections and precision cosmology |
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Authors: | V Nefer ?eno?uz Qaisar Shafi |
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Institution: | 1. Division of Sciences, Do?u? University, 34722 Kad?köy, Istanbul, Turkey;2. Bartol Research Institute, Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA |
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Abstract: | We employ chaotic (?2 and ?4) inflation to illustrate the important role radiative corrections can play during the inflationary phase. Yukawa interactions of ? , in particular, lead to corrections of the form −κ?4ln(?/μ), where κ>0 and μ is a renormalization scale. For instance, ?4 chaotic inflation with radiative corrections looks compatible with the most recent WMAP (5 year) analysis, in sharp contrast to the tree level case. We obtain the 95% confidence limits 2.4×10−14?κ?5.7×10−14, 0.931?ns?0.958 and 0.038?r?0.205, where ns and r respectively denote the scalar spectral index and scalar to tensor ratio. The limits for ?2 inflation are κ?7.7×10−15, 0.929?ns?0.966 and 0.023?r?0.135. The next round of precision experiments should provide a more stringent test of realistic chaotic ?2 and ?4 inflation. |
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Keywords: | 98 80 Cq |
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