Low tension strings on a cosmological singularity

Craps, Ben and Krishnan, Chethan and Saurabh, Ayush (2014) Low tension strings on a cosmological singularity. In: JOURNAL OF HIGH ENERGY PHYSICS (8).

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Abstract

It has recently been argued that the singularity of the Milne orbifold can be resolved in higher spin theories. In string theory scattering amplitudes, however, the Milne singularity gives rise to ultraviolet divergences that signal uncontrolled backreaction. Since string theory in the low tension limit is expected to be a higher spin theory (although precise proposals only exist in special cases), we investigate what happens to these scattering amplitudes in the low tension limit. We point out that the known problematic ultraviolet divergences disappear in this limit. In addition we systematically identify all divergences of the simplest 2-to-2 tree-level string scattering amplitude on the Milne orbifold, and argue that the divergences that survive in the low tension limit have sensible infrared interpretations.

Item Type:	Journal Article
Publication:	JOURNAL OF HIGH ENERGY PHYSICS
Publisher:	SPRINGER
Additional Information:	Copy right for this article belongs to the SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
Keywords:	Higher Spin Gravity; Scattering Amplitudes; Bosonic Strings; Spacetime Singularities
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for High Energy Physics Division of Physical & Mathematical Sciences > Centre for Theoretical Studies (Ceased to exist at the end of 2003)
Date Deposited:	24 Feb 2015 05:56
Last Modified:	24 Feb 2015 05:56
URI:	http://eprints.iisc.ac.in/id/eprint/50863

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