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@article{de:2014:16/165004,
author = {de, Rham C and Matas, A and Tolley, AJ},
doi = {16/165004},
journal = {Classical and Quantum Gravity},
title = {New kinetic interactions for massive gravity?},
url = {http://dx.doi.org/10.1088/0264-9381/31/16/165004},
volume = {31},
year = {2014}
}

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TY  - JOUR
AB  - We show that there can be no new Lorentz invariant kinetic interactions free from the Boulware–Deser ghost in four dimensions in the metric formulation of gravity, beyond the standard Einstein–Hilbert, up to total derivatives. We use dimensional deconstruction as a way to motivate a non-linear ansatz for potential new ghost-free kinetic interactions for massive gravity, bi-gravity and multi-gravity in four and higher dimensions. These interactions descend from Lovelock terms, and so naively one might expect the interactions to be ghost-free. However, we show that these new interactions inevitably lead to more than five propagating degrees of freedom. We then perform a general perturbative analysis in four dimensions, and show that the only term with two derivatives that does not introduce a ghost is the Einstein–Hilbert term. This result extends to all orders in perturbations.
AU  - de,Rham C
AU  - Matas,A
AU  - Tolley,AJ
DO  - 16/165004
PY  - 2014///
SN  - 0264-9381
TI  - New kinetic interactions for massive gravity?
T2  - Classical and Quantum Gravity
UR  - http://dx.doi.org/10.1088/0264-9381/31/16/165004
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000341421600004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
VL  - 31
ER  -

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Prof. Andrew J. Tolley

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