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@article{de:2018:10.1007/JHEP04(2018)083,
author = {de, Rham C and Melville, S and Tolley, AJ},
doi = {10.1007/JHEP04(2018)083},
journal = {Journal of High Energy Physics},
title = {Improved positivity bounds and massive gravity},
url = {http://dx.doi.org/10.1007/JHEP04(2018)083},
volume = {2018},
year = {2018}
}

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TY  - JOUR
AB  - Theories such as massive Galileons and massive gravity can satisfy the presently known improved positivity bounds provided they are weakly coupled. We discuss the form of the EFT Lagrangian for a weakly coupled UV completion of massive gravity which closely parallels the massive Galileon, and perform the power counting of corrections to the scattering amplitude and the positivity bounds. The Vainshtein mechanism which is central to the phenomenological viability of massive gravity is entirely consistent with weak coupling since it is classical in nature. We highlight that the only implication of the improved positivity constraints is that the EFT cutoff is lower than previous assumed, and discuss the observable implications, emphasizing that these bounds are not capable of ruling out the model contrary to previous statements in the literature.
AU  - de,Rham C
AU  - Melville,S
AU  - Tolley,AJ
DO  - 10.1007/JHEP04(2018)083
PY  - 2018///
SN  - 1029-8479
TI  - Improved positivity bounds and massive gravity
T2  - Journal of High Energy Physics
UR  - http://dx.doi.org/10.1007/JHEP04(2018)083
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000430567800003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/58871
VL  - 2018
ER  -

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Prof. Andrew J. Tolley

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