Skip to main content

Dynamical string tension in string theory with spacetime Weyl invariance

Author(s): Bars, Itzhak; Steinhardt, Paul J.; Turok, Neil

To refer to this page use:
Abstract: The fundamental string length, which is an essential part of string theory, explicitly breaks scale invariance. However, in field theory we demonstrated recently that the gravitational constant, which is directly related to the string length, can be promoted to a dynamical field if the standard model coupled to gravity (SM+GR) is lifted to a locally scale (Weyl) invariant theory. The higher gauge symmetry reveals previously unknown field patches whose inclusion turn the classically conformally invariant SM+GR into a geodesically complete theory with new cosmological and possibly further physical consequences. In this paper this concept is extended to string theory by showing how it can be “Weyl lifted” with a local scale symmetry acting on target space background fields. In this process the string tension (fundamental string length) is promoted to a dynamical field, in agreement with the parallel developments in field theory. We then propose a string theory in a geodesically complete cosmological stringy background which suggests previously unimagined directions in the stringy exploration of the very early universe. (C) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Publication Date: Nov-2014
Electronic Publication Date: 8-Aug-2014
Citation: Bars, Itzhak, Steinhardt, Paul J, Turok, Neil. (2014). Dynamical string tension in string theory with spacetime Weyl invariance. FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS, 62 (901 - 920). doi:10.1002/prop.201400059
DOI: doi:10.1002/prop.201400059
ISSN: 0015-8208
EISSN: 1521-3978
Pages: 901 - 920
Type of Material: Journal Article
Version: Author's manuscript

Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.