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Warped spectroscopy: localization of frozen bulk modes

Frey, Andrew R. and Maharana, Anshuman (2006) Warped spectroscopy: localization of frozen bulk modes. Journal of High Energy Physics, 2006 (08). Art. No. 021. ISSN 1126-6708. doi:10.1088/1126-6708/2006/08/021.

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We study the 10D equation of motion of dilaton-axion fluctuations in type IIB string compactifications with three-form flux, taking warping into account. Using simplified models with physics comparable to actual compactifications, we argue that the lightest mode localizes in long warped throats and takes a mass of order the warped string scale. Also, the Gukov-Vafa-Witten superpotential is valid for the lightest mass mode; however, the mass is similar to the Kaluza-Klein scale, so the dilaton-axion should be integrated out of the effective theory in this long throat regime (leaving a constant superpotential). On the other hand, there is a large hierarchy between flux-induced and KK mass scales for moderate or weak warping. This hierarchy agrees with arguments given for trivial warping. Along the way, we also estimate the effect of the other 10D supergravity equations of motion on the dilaton-axion fluctuation, since these equations act as constraints. We argue that they give negligible corrections to the simplest approximation.

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Additional Information:Copyright © IOP Publishing Limited 2007. Received 25 April 2006, accepted for publication 11 July 2006. Published 11 August 2006. The authors would like to thank A. Basu, I. Bena, H. Elvang, S. Giddings, S. Gukov, N. Mann, P. Ouyang, J. Polchinski, A. Sen, and A. Virmani for useful discussions and communications. The work of ARF is supported by the John A. McCone postdoctoral fellowship at the California Institute of Technology and also partially by the Department of Energy contract DE-FG03-92-1ER40701. The work of AM is supported by the Department of Energy under contract DE-FG02-91ER40618. AM would like to thank the Hebrew University for hospitality during the 23rd Jerusalem Winter School. E-print number: hep-th/0603233
Subject Keywords:Flux compactifications, Superstring Vacua.
Issue or Number:08
Record Number:CaltechAUTHORS:FREjhep06
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9318
Deposited By: Archive Administrator
Deposited On:12 Dec 2007
Last Modified:08 Nov 2021 20:58

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