Journal article

Transplanckian censorship and global cosmic strings

Matthew J Dolan, Patrick Draper, Jonathan Kozaczuk, Hiren Patel

JOURNAL OF HIGH ENERGY PHYSICS | SPRINGER | Published : 2017

Abstract

Large field excursions are required in a number of axion models of inflation. These models also possess global cosmic strings, around which the axion follows a path mirroring the inflationary trajectory. Cosmic strings are thus an interesting theoretical laboratory for the study of transplanckian field excursions. We describe connections be-tween various effective field theory models of axion monodromy and study the classical spacetimes around their supercritical cosmic strings. For small decay constants f Mp/f , the EFT is under control and the string cores undergo topological inflation, which may be either of exponential or power-law type. We show that the exterior spacetime is nonsingula..

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University of Melbourne Researchers

Grants

Funding Acknowledgements

MJD is supported by the Australian Research Council. PD thanks Lorenzo Sorbo, Jennie Traschen, David Kastor, Szilard Farkas, Matt Reece, Alex Maloney, Scott Thomas, Michael Dine, and Nima Arkani-Hamed for valuable discussions, and we acknowledge the use of the Mathematica package RGTC in this work. PD also thanks T. Minchin.