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Title: Probing the Geometry of Warped String Compactifications at the LHC

Abstract

Warped string compactifications, characterized by the nonsingular behavior of the metric in the infrared (IR), feature departures from the usual anti?de Sitter warped extra dimensions. We study the implications of the smooth IR cutoff for Randall-Sundrum- (RS-)type models. We find that the phenomenology of the Kaluza-Klein gravitons (including their masses and couplings) depends sensitively on the precise shape of the warp factor in the IR. In particular, we analyze the warped deformed conifold, find that the spectrum differs significantly from that of RS, and present a simple prescription (a mass-gap ansatz) that can be used to study the phenomenology of IR modifications to 5D warped extra dimensions.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Physics Division
OSTI Identifier:
929706
Report Number(s):
LBNL-347E
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US0803519
DOE Contract Number:
DE-AC02-05CH11231
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 100; Related Information: Journal Publication Date: 22 January 2008
Country of Publication:
United States
Language:
English
Subject:
72; DIMENSIONS; GEOMETRY; GRAVITONS; METRICS; MODIFICATIONS; SHAPE

Citation Formats

Walker, Devin, Shiu, Gary, Underwood, Bret, Zurek, Kathryn M., and Walker, Devin G. E. Probing the Geometry of Warped String Compactifications at the LHC. United States: N. p., 2007. Web.
Walker, Devin, Shiu, Gary, Underwood, Bret, Zurek, Kathryn M., & Walker, Devin G. E. Probing the Geometry of Warped String Compactifications at the LHC. United States.
Walker, Devin, Shiu, Gary, Underwood, Bret, Zurek, Kathryn M., and Walker, Devin G. E. Mon . "Probing the Geometry of Warped String Compactifications at the LHC". United States. doi:. https://www.osti.gov/servlets/purl/929706.
@article{osti_929706,
title = {Probing the Geometry of Warped String Compactifications at the LHC},
author = {Walker, Devin and Shiu, Gary and Underwood, Bret and Zurek, Kathryn M. and Walker, Devin G. E.},
abstractNote = {Warped string compactifications, characterized by the nonsingular behavior of the metric in the infrared (IR), feature departures from the usual anti?de Sitter warped extra dimensions. We study the implications of the smooth IR cutoff for Randall-Sundrum- (RS-)type models. We find that the phenomenology of the Kaluza-Klein gravitons (including their masses and couplings) depends sensitively on the precise shape of the warp factor in the IR. In particular, we analyze the warped deformed conifold, find that the spectrum differs significantly from that of RS, and present a simple prescription (a mass-gap ansatz) that can be used to study the phenomenology of IR modifications to 5D warped extra dimensions.},
doi = {},
journal = {Physical Review Letters},
number = ,
volume = 100,
place = {United States},
year = {Mon May 28 00:00:00 EDT 2007},
month = {Mon May 28 00:00:00 EDT 2007}
}
  • Warped string compactifications, characterized by the nonsingular behavior of the metric in the infrared (IR), feature departures from the usual anti-de Sitter warped extra dimensions. We study the implications of the smooth IR cutoff for Randall-Sundrum- (RS-)type models. We find that the phenomenology of the Kaluza-Klein gravitons (including their masses and couplings) depends sensitively on the precise shape of the warp factor in the IR. In particular, we analyze the warped deformed conifold, find that the spectrum differs significantly from that of RS, and present a simple prescription (a mass-gap ansatz) that can be used to study the phenomenology ofmore » IR modifications to 5D warped extra dimensions.« less
  • The dynamics of warped/flux compactifications is studied, including warping effects, providing a firmer footing for investigation of the 'landscape'. We present a general formula for the four-dimensional potential of warped compactifications in terms of ten-dimensional quantities. This allows a systematic investigation of moduli-fixing effects and potentials for mobile branes. We provide a necessary criterion, 'slope dominance', for evading 'no-go' results for de Sitter vacua. We outline the ten-dimensional derivation of the nonperturbative effects that should accomplish this in examples of Kachru, Kallosh, Linde and Trivedi and outline a systematic discussion of their corrections. We show that potentials for mobile branesmore » receive generic contributions inhibiting slow-roll inflation. We give a linearized analysis of general scalar perturbations of warped IIB compactifications, revealing new features for both time-independent and dependent moduli, and new aspects of the kinetic part of the four-dimensional effective action. The universal Kahler modulus is found not to be a simple scaling of the internal metric, and a prescription is given for defining holomorphic Kahler moduli, including warping effects. In the presence of mobile branes, this prescription elucidates couplings between bulk and brane fields. Our results are thus relevant to investigations of the existence of de Sitter vacua in string theory, and of their phenomenology, cosmology, and statistics.« less
  • We study linearized gravity in a six-dimensional Einstein-Maxwell model of warped braneworlds, where the extra dimensions are compactified by a magnetic flux. It is difficult to construct a strict codimension two braneworld with matter sources other than pure tension. To overcome this problem we replace the codimension two defect by an extended brane, with one spatial dimension compactified on a Kaluza-Klein circle. Our background is composed of a warped, axisymmetric bulk and one or two branes. We find that weak gravity sourced by arbitrary matter on the brane(s) is described by a four-dimensional scalar-tensor theory. We show, however, that themore » scalar mode is suppressed at long distances and hence four-dimensional Einstein gravity is reproduced on the brane.« less