Behind Horndeski: Structurally Robust Higher Derivative EFTs

Autor: Santoni, Luca, Trincherini, Enrico, Trombetta, Leonardo G., Theoretical Physics, Sub Algemeen Theoretical Physics
Přispěvatelé: Theoretical Physics, Sub Algemeen Theoretical Physics, Santoni, Luca, Trincherini, Enrico, Trombetta, LEONARDO GIULIANO
Jazyk: angličtina
Rok vydání: 2018
Předmět:
High Energy Physics - Theory
Nuclear and High Energy Physics
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Space-Time Symmetrie
FOS: Physical sciences
01 natural sciences
Theoretical physics
symbols.namesake
High Energy Physics - Phenomenology (hep-ph)
0103 physical sciences
Effective field theory
lcsh:Nuclear and particle physics. Atomic energy. Radioactivity
010306 general physics
Quantum
Effective Field Theorie
EFTS
Physics
010308 nuclear & particles physics
Space-Time Symmetries
Effective Field Theories
Cosmological model
Global symmetry
Settore FIS/02 - Fisica Teorica
Modelli e Metodi Matematici
High Energy Physics - Phenomenology
High Energy Physics - Theory (hep-th)
astro-ph.CO
Dark energy
symbols
lcsh:QC770-798
Classical Theories of Gravity
Phenomenology (particle physics)
Lagrangian
Astrophysics - Cosmology and Nongalactic Astrophysics
Zdroj: Journal of High Energy Physics, 2018(8). Springer Verlag
Journal of High Energy Physics
Journal of High Energy Physics, Vol 2018, Iss 8, Pp 1-21 (2018)
ISSN: 1126-6708
Popis: Higher derivative scalar interactions can give rise to interesting cosmological scenarios. We present a complete classification of such operators that can yield sizeable effects without introducing ghosts and, at the same time, define an effective field theory robust under the inclusion of quantum corrections. A set of rules to power count consistently the coefficients of the resulting Lagrangian is provided by the presence of an approximate global symmetry. The interactions that we derive in this way contain a subset of the so-called Horndeski and beyond Horndeski theories. Our construction therefore provides a structurally robust context to study their phenomenology. Applications to dark energy/modified gravity and geodesically complete cosmologies are briefly discussed.
14+8 pages, 2 figures, 1 table. Minor changes. Published version
Databáze: OpenAIRE
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