%0 Journal Article
%A Borislavov Vassilev, Teodor
%A Martín Moruno, María Del Prado
%A Bouhmadi López, Miriam
%T Big rip in shift-symmetric kinetic gravity braiding theories
%D 2023
%@ 0370-2693
%U https://hdl.handle.net/20.500.14352/99622
%X We revise the future fate of a group of scalar-tensor theories known as kinetic gravity braiding models. As it is well-known, these theories can safely drive the expansion of the universe towards a future de Sitter state if the corresponding Lagrangian is invariant under constant shifts in the scalar field. However, this is not the only possible future state of these shift-symmetric models as we show in this letter. In fact, future cosmic singularities characterized by a divergence of the energy density can also appear in this framework. We present an explicit example where a big rip singularity is the only possible future fate of the cosmos.
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