LAUSR

Shift-symmetric 𝖲𝖮(𝖭) multi-Galileon

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0 Published in 2021 at "Journal of Cosmology and Astroparticle Physics"

DOI: 10.1088/1475-7516/2021/12/045

Abstract: A Poincarè invariant, local scalar field theory in which the Lagrangian and the equation of motion contain only up to second-order derivatives of the fields is called generalized Galileon. The covariant version of it in… read more here.

Keywords: theory; multi; shift symmetric; multi galileon ... See more keywords

Shift-symmetric orbital inflation: Single field or multifield?

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0 Published in 2020 at "Physical Review D"

DOI: 10.1103/physrevd.102.021302

Abstract: We present a new class of two-field inflationary attractor models, known as `shift-symmetric orbital inflation', whose behaviour is strongly multi-field but whose predictions are remarkably close to those of single-field inflation. In these models, the… read more here.

Keywords: field; single field; inflation; symmetric orbital ... See more keywords

Late-time acceleration driven by shift-symmetric Galileon in the presence of torsion

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0 Published in 2018 at "Physical Review D"

DOI: 10.1103/physrevd.98.083506

Abstract: A shift-symmetric Galileon model in presence of spacetime torsion has been constructed for the first time. This has been realized by localizing (or, gauging) the Galileon symmetry in flat spacetime in an appropriate manner. We… read more here.

Keywords: torsion; time; shift symmetric; symmetric galileon ... See more keywords

Exact black hole solutions in shift-symmetric quadratic degenerate higher-order scalar-tensor theories

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0 Published in 2019 at "Physical Review D"

DOI: 10.1103/physrevd.99.064040

Abstract: We find various exact black hole solutions in the shift-symmetric subclass of the quadratic degenerate higher-order scalar-tensor (DHOST) theories with linearly time dependent scalar field whose kinetic term is constant. The exact solutions are the… read more here.

Keywords: black hole; hole solutions; exact black; quadratic degenerate ... See more keywords