Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 10, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2020/10/010
Keywords
dark energy theory; gravitational waves / theory; gravity; quantum gravity phenomenology
Funding
- European Research Council (ERC) under the European Unions Horizon 2020 research and innovation programme [801781]
- Swiss National Science Foundation [179740]
- STFC Ernest Rutherford Fellowship [ST/S004572/1]
- Walter Haefner Foundation
- ETH Zurich Foundation
- STFC [ST/P000673/1, ST/S004572/1, ST/T00049X/1] Funding Source: UKRI
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With recent constraints on the propagation speed of gravitational waves, the class of scalar-tensor theories has significantly been reduced. We consider one of the surviving models still relevant for cosmology and investigate its radiative stability. The model contains operators with explicit breaking of the Galileon symmetry and we study whether they harm the re-organization of the effective field theory. Within the regime of validity we establish a non-renormalization theorem and show explicitly that the quantum corrections, to one-loop, do not detune the classical Lagrangian generating suppressed counterterms. This is striking since the non-renormalization theorem is established in the presence of a genuine Galileon symmetry breaking term.
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