Natural hybrid inflation model with large non-Gaussianity

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• 作者：Ki-Young Choi^a ; ^b ; ^{kiyoung.choi@apctp.org} ; Bumseok Kyae^c ; ^{bkyae@pusan.ac.kr}
• 关键词：Hybrid inflation ; Natural inflation ; Spectral index ; Non-Gaussianity
• 刊名：Physics Letters B
• 出版年：2012
• 出版时间：5 January 2012
• 年：2012
• 卷：706
• 期：4-5
• 页码：243-250
• 全文大小：259 K

文摘

We propose an inflationary model (¡°natural hybrid model?, which combines the supersymmetric hybrid model and the natural inflation model to achieve the spectral index of 0.96, and the axion decay constant smaller than the Planck scale, . By introducing both U(1)_R and a shift symmetry and employing the minimal K?hler potential, the eta-problem can be still avoided. The two inflaton fields in this model can admit large non-Gaussianity.