Borislavov Vassilev, TeodorMartín Moruno, María Del PradoBouhmadi López, Miriam2024-02-062024-02-062023-01-20Borislavov Vasilev, Teodor, et al. «Big Rip in Shift-Symmetric Kinetic Gravity Braiding Theories». Physics Letters B, vol. 838, marzo de 2023, p. 137711. DOI.org (Crossref), https://doi.org/10.1016/j.physletb.2023.137711.0370-269310.1016/j.physletb.2023.137711https://hdl.handle.net/20.500.14352/99622We 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.engAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/journal article1873-2445https://doi.org/10.1016/j.physletb.2023.137711open access53Cosmological singularitiesPhantom energyScalar tensor theoriesFísica (Física)22 Física