Naslov
Tensor Galileons and gravity

Autori
Chatzistavrakidis, Athanasios ; Khoo, Fech Scen ; Roest, Diederik ; Schupp, Peter

Izvornik
The Journal of high energy physics (1126-6708) 2017 (2017), 3; 070, 25

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Galileons, Gravity theories, Graded geometry

Sažetak
The particular structure of Galileon interactions allows for higher-derivative terms while retaining second order field equations for scalar fields and Abelian p -forms. In this work we introduce an index-free formulation of these interactions in terms of two sets of Grassmannian variables. We employ this to construct Galileon interactions for mixed-symmetry tensor fields and coupled systems thereof. We argue that these tensors are the natural generalization of scalars with Galileon symmetry, similar to p -forms and scalars with a shift-symmetry. The simplest case corresponds to linearised gravity with Lovelock invariants, relating the Galileon symmetry to diffeomorphisms. Finally, we examine the coupling of a mixed-symmetry tensor to gravity, and demonstrate in an explicit example that the inclusion of appropriate counterterms retains second order field equations.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA