Gauge-flation vs chromo-natural inflation

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• 作者：M.M. Sheikh-Jabbari
• 关键词：Inflation ; Non-Abelian gauge theory ; Axion ; Gauge-flation
• 刊名：Physics Letters B
• 出版年：2012
• 出版时间：22 October, 2012
• 年：2012
• 卷：717
• 期：1-3
• 页码：6-9
• 全文大小：142 K

文摘

Gauge-flation, non-Abelian gauge field inflation, which was introduced in Maleknejad and Sheikh-Jabbari (2011) and analyzed more thoroughly in Maleknejad and Sheikh-Jabbari (2011) , is a model of inflation driven by non-Abelian gauge fields minimally coupled to Einstein gravity. In this model a certain rotationally invariant combination of gauge fields plays the role of the inflaton. Recently, the chromo-natural inflation model was proposed (Adshead and Wyman, 2012 ) which besides the non-Abelian gauge fields also involves an axion field. In this short Letter we show that the model involving axions, indeed allows for various slow-roll trajectories for different values of its parameters: A specific trajectory discussed in Adshead and Wyman (2012) starts from a ¡°small axion¡± region, while the trajectory considered in Maleknejad and Sheikh-Jabbari (2011) corresponds to a ¡°large axion¡± region.