Imperial College London
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Prof. Andrew J. Tolley

Faculty of Natural Sciences, Department of Physics

Professor of Theoretical Physics
 
 
 
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Contact

 

+44 (0)20 7594 1526a.tolley

 
 
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Location

 

607Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{de:2016:10.1016/j.physletb.2016.07.035,
author = {de, Rham C and Tolley, AJ and Zhou, S-Y},
doi = {10.1016/j.physletb.2016.07.035},
journal = {Physics Letters B},
pages = {579--583},
title = {Non-compact nonlinear sigma models},
url = {http://dx.doi.org/10.1016/j.physletb.2016.07.035},
volume = {760},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The target space of a nonlinear sigma model is usually required to be positive definite to avoid ghosts. We introduce a unique class of nonlinear sigma models where the target space metric has a Lorentzian signature, thus the associated group being non-compact. We show that the would-be ghost associated with the negative direction is fully projected out by 2 second-class constraints, and there exist stable solutions in this class of models. This result also has important implications for Lorentz–invariant massive gravity: There exist stable nontrivial vacua in massive gravity that are free from any linear vDVZ-discontinuity and a Λ2 decoupling limit can be defined on these vacua.
AU  - de,Rham C
AU  - Tolley,AJ
AU  - Zhou,S-Y
DO  - 10.1016/j.physletb.2016.07.035
EP  - 583
PY  - 2016///
SN  - 0370-2693
SP  - 579
TI  - Non-compact nonlinear sigma models
T2  - Physics Letters B
UR  - http://dx.doi.org/10.1016/j.physletb.2016.07.035
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000382890500088&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/45788
VL  - 760
ER  -
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