Axion monodromy inflation with warped KK-modes

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• 作者：Arthur Hebecker^a ; Jakob Moritz^a ; Alexander Westphal^b ; Lukas T. Witkowski^a ; ^{l.witkowski@thphys.uni-heidelberg.de" class="auth_mail" title="E-mail the corresponding author}
• 刊名：Physics Letters B
• 出版年：2016
• 出版时间：10 March 2016
• 年：2016
• 卷：754
• 期：Complete
• 页码：328-334
• 全文大小：412 K

文摘

We present a particularly simple model of axion monodromy inflation: Our axion is the lowest-lying KK-mode of the RR-2-form-potential C₂$C_2$ in the standard Klebanov–Strassler throat. One can think of this inflaton candidate as being defined by the integral of C₂$C_2$ over the S²$S^2$ cycle of the throat. It obtains an exponentially small mass from the IR-region in which the S²$S^2$ shrinks to zero size. Crucially, the S²$S^2$ cycle has to be shared between two throats, such that the second locus where the S²$S^2$ shrinks is also in a warped region. Well-known problems like the potentially dangerous back-reaction of brane/antibrane pairs and explicit supersymmetry breaking are not present in our scenario. The inflaton back-reaction on the geometry turns out to be controlled by the string coupling g_s$g_s$. We hope that our setting is simple enough for many critical consistency issues of large-field inflation in string theory to be addressed at a quantitative level.