Scalar-tensor theory with EGB term from Einstein Chern-Simons gravity
نویسندگان
چکیده
It is shown that the compactification á la Randall-Sundrum of so-called, five-dimensional Einstein-Chern-Simons action gravity leads to an for a four-dimensional scalar-tensor includes Gauss-Bonnet term, which belongs particular case Horndeski theory. The new gravitational degrees freedom were introduced requiring be invariant under symmetries greater than usual Poincaré or (A)dS symmetries, namely so-called generalized Poincare algebras B5.
منابع مشابه
Einstein Gravity as a Deformed Chern - Simons Theory
The usual description of 2 + 1 dimensional Einstein gravity as a Chern-Simons (CS) theory is extended to a one parameter family of descriptions of 2 + 1 Einstein gravity. This is done by replacing the Poincaré gauge group symmetry by a q−deformed Poincaré gauge group symmetry, with the former recovered when q → 1. As a result, we obtain a one parameter family of Hamiltonian formulations for 2 +...
متن کاملW Gravity From Chern–Simons Theory
Starting with three dimensional Chern–Simons theory with gauge group Sl(N, IR), we derive an action Scov invariant under both left and right WN transformations. We give an interpretation of Scov in terms of anomalies, and discuss its relation with Toda theory. e-mail: [email protected] e-mail: [email protected]
متن کاملLeptogenesis and tensor polarisation from a gravitational Chern-Simons term
Within an effective field theory derived from string theory, it may be reasonable for the action to contain the gravitational Chern-Simons (gCS) term, coupled to say the universal axion. During any era when the axion field is varying, the vacuum fluctuation of the gravitational wave amplitude will then be circularly polarised, generating an expectation value for the gCS term. The polarisation m...
متن کاملDilaton gravity (with a Gauss-Bonnet term) derived from five-dimensional Chern-Simons gravity
We study the problem of boundary terms and boundary conditions for Chern-Simons gravity in five dimensions. We show that under reasonable boundary conditions one finds an effective field theory at the four-dimensional boundary described by dilaton gravity with a Gauss-Bonnet term. The coupling of matter is also discussed. The existing link between three-dimensional Chern-Simons theory and two-d...
متن کاملChern-simons Gravity from 3+1-dimensional Gravity
In the context of a Poincaré gauge theoretical formulation, pure gravity in 3 + 1dimensions is dimensionally reduced to gravity in 2 + 1-dimensions with or without cosmological constant Λ. The dimensional reductions are consistent with the gauge symmetries, mapping ISO(3, 1) gauge transformations into ISO(2, 1) ones. One of the reductions leads to Chern-Simons-Witten gravity. The solutions of 2...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2023
ISSN: ['1873-1562', '0550-3213']
DOI: https://doi.org/10.1016/j.nuclphysb.2023.116291