Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 3, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP03(2019)182
Keywords
Effective Field Theories; Scattering Amplitudes
Categories
Funding
- STFC [ST/P000762/1]
- Royal Society
- European Union [724659]
- Simons Foundation under the Simons Foundation's Origins of the Universe initiative, 'Cosmology Beyond Einstein's Theory' [555326]
- Imperial College President's Fellowship
- University of Science and Technology of China [KY2030000089]
- National 1000 Young Talents Program of China
- STFC [ST/P000762/1] Funding Source: UKRI
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We apply the recently developed positivity bounds for particles with spin, applied away from the forward limit, to the low energy effective theories of massive spin-1 and spin-2 theories. For spin-1 theories, we consider the generic Proca EFT which arises at low energies from a heavy Higgs mechanism, and the special case of a charged Galileon for which the EFT is reorganized by the Galileon symmetry. For spin-2, we consider generic (5) massive gravity theories and the special ghost-free' (3) theories. Remarkably we find that at the level of 2-2 scattering, the positivity bounds applied to (5) massive gravity theories, impose the special tunings which generate the (3) structure. For (3) massive gravity theories, the island of positivity derived in the forward limit appears relatively stable against further bounds.
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