6,097 research outputs found
Massive spin-2 scattering amplitudes in extra-dimensional theories
In this paper we describe in detail the computation of the scattering
amplitudes of massive spin-2 Kaluza-Klein excitations in a gravitational theory
with a single compact extra dimension, whether flat or warped. These scattering
amplitudes are characterized by intricate cancellations between different
contributions: although individual contributions may grow as fast as , the full results grow only as . We demonstrate that the
cancellations persist for all incoming and outgoing particle helicities and
examine how truncating the computation to only include a finite number of
intermediate states impacts the accuracy of the results. We also carefully
assess the range of validity of the low energy effective Kaluza-Klein theory.
In particular, for the warped case we demonstrate directly how an emergent low
energy scale controls the size of the scattering amplitude, as conjectured by
the AdS/CFT correspondence
Thermodynamic Bethe Ansatz for the AdS_5 x S^5 Mirror Model
We use the string hypothesis for the mirror theory to derive the
Thermodynamic Bethe Ansatz equations for the AdS_5 x S^5 mirror model. We
further demonstrate how these equations can be used to construct the associated
Y-system recently discussed in the literature, putting particular emphasis on
the assumptions and the range of validity of the corresponding construction.Comment: 31 pages, LaTex, v2: references added, v3: published versio
Review of AdS/CFT Integrability: An Overview
This is the introductory chapter of a review collection on integrability in
the context of the AdS/CFT correspondence. In the collection we present an
overview of the achievements and the status of this subject as of the year
2010.Comment: 31 pages, v2: reference added, references to other chapters updated,
v3: footnote 1 on location of references added, v4: minor changes, references
added, accepted for publication in Lett. Math. Phys, v5: minor corrections,
links to chapters updated, attached IntAdS.pdf with all chapters in one file,
see http://arxiv.org/src/1012.3982/anc/IntAdS.pdf or
http://www.phys.ethz.ch/~nbeisert/IntAdS.pd
The particle-hole transformation, supersymmetry and achiral boundaries of the open Hubbard model
We show that the particle-hole transformation in the Hubbard model has a
crucial role in relating Shastry's R-matrix to the AdS/CFT S-matrix. In
addition, we construct an achiral boundary for the open Hubbard chain which
possesses twisted Yangian symmetry
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