We present a new model of string inflation driven by a blow-up K & auml;hler 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 r similar to 10-5.
Bansal S., Brunelli L., Cicoli M., Hebecker A., Kuespert R. (2024). Loop blow-up inflation. JOURNAL OF HIGH ENERGY PHYSICS, 2024(7), 1-40 [10.1007/JHEP07(2024)289].
Loop blow-up inflation
Brunelli L.Membro del Collaboration Group
;Cicoli M.Membro del Collaboration Group
;
2024
Abstract
We present a new model of string inflation driven by a blow-up K & auml;hler 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 r similar to 10-5.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
