Loop Blow-up Inflation
Abstract
We present a new model of string inflation driven by a blow-up K\"ahler modulus of type IIb compactifications with a potential generated by string loops. Slow-roll is naturally realized thanks to the fact that the blow-up mode is a leading-order flat direction lifted by string loops which are unavoidable and generate a plateau at large field values. We check that throughout the whole inflationary dynamics the effective field theory is under control. We perform a phenomenological analysis determining the exact number of efoldings by studying the post-inflationary evolution. We determine the values of the microscopic parameters which lead to agreement with CMB data, together with the prediction of a tensor-to-scalar ratio of order .
Cite
@article{arxiv.2403.04831,
title = {Loop Blow-up Inflation},
author = {Sukŗti Bansal and Luca Brunelli and Michele Cicoli and Arthur Hebecker and Ruben Kuespert},
journal= {arXiv preprint arXiv:2403.04831},
year = {2024}
}
Comments
41 pages, 2 figures, 1 appendix; v2: further discussion and references added, minor mistakes corrected