We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Higher derivative field theories: degeneracy conditions and classes.
- Authors
Crisostomi, Marco; Klein, Remko; Roest, Diederik
- Abstract
We provide a full analysis of ghost free higher derivative field theories with coupled degrees of freedom. Assuming the absence of gauge symmetries, we derive the degeneracy conditions in order to evade the Ostrogradsky ghosts, and analyze which (non)trivial classes of solutions this allows for. It is shown explicitly how Lorentz invariance avoids the propagation of 'half' degrees of freedom. Moreover, for a large class of theories, we construct the field redefinitions and/or (extended) contact transformations that put the theory in a manifestly first order form. Finally, we identify which class of theories cannot be brought to first order form by such transformations.
- Subjects
FIELD theory (Physics); DEGENERATE perturbation theory; DEGREES of freedom; SYMMETRY (Physics); CONTACT transformations
- Publication
Journal of High Energy Physics, 2017, Vol 2017, Issue 6, p1
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1007/JHEP06(2017)124