Speaker
Dr
Nima Khosravi
Description
The Weyl biconnection model manifests a natural framework to
automatically produce the structure of
the Galileon theory. It is shown that this framework can
explain the scalar and vector Galileon as well as
their interactions by generalizing the Weyl nonmetricity,
and as such it can be interpreted as a geometrical
realization for Galileons. The nonmetricity part enjoys a
U(1) gauge invariance. The result is interestingly
nontrivial since the structure of the Galileon theory
appears spontaneously, and not by demanding the
absence of the Ostrogradsky ghost. This fact suggests a
possible deeper conceptual relation between the
Weyl biconnection model and the absence of the Ostrogradsky
ghost.
