Backreaction issues in axion monodromy and Minkowski 4-forms

DOI10.1007/JHEP06(2017)098zbMATH Open1380.85022arXiv1611.00394OpenAlexW3103085942MaRDI QIDQ683209

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Publication date: 5 February 2018

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Abstract: We clarify the differences between the usual Kaloper-Sorbo description of axion monodromy and the effective axionic potential in terms of Minkowski 4-forms derived in string compactifications. The fact that the metric of the 3-form fields coming from string theory is field dependent (unlike in Kaloper-Sorbo) leads to the backreaction issues recently studied in axion monodromy models within string theory. We reanalyse these problems in terms of the 4-forms focusing on the case in which the non-periodic scalars backreact on the Kahler metric of the inflaton reducing the physical field range. In the closed string sector of Type II Calabi-Yau compactifications with fluxes the metric becomes field dependent precisely when $Deltaphisim{M}_p$, independently of the choice of fluxes. We propose, however, some counter-examples to this universal behaviour by including open string fields.

Full work available at URL: https://arxiv.org/abs/1611.00394

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