Bonn 2020 – scientific programme
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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik
MP 1: Gravity: Classical and Quantum
MP 1.1: Talk
Monday, March 30, 2020, 12:00–12:20, H-HS VII
Disformal transformations in Weitzenböck geometry — •Manuel Hohmann — University of Tartu, Tartu, Estonia
We study disformal transformations in the context of scalar extensions to teleparallel gravity, in which the gravitational interaction is mediated by the torsion of a flat, metric compatible connection. This geometry, also known as Weitzenböck geometry, provides an alternative background geometry also for other field theories. We find a generic class of scalar-torsion actions which is invariant under disformal transformations, and which possesses different invariant subclasses. For the most simple of these subclasses we explicitly derive all terms that may appear in the action. We propose to study actions from this class as possible teleparallel analogues of healthy beyond Horndeski theories, or degenerate higher-order scalar tensor (DHOST) theories.