34 citations · 94 across the 12 of their papers we have counts for
9 papers · 1 filter
Dual is Different: EFTs, Axions and Nonpropagating Form Fields in Cosmology
C. P. Burgess, F. Quevedo
Scalar fields in 4D are known to have equivalent dual descriptions in terms of form-field gauge potentials, but this is often regarded as an arcane fact. Why use more complicated f…
Screened Axio-dilaton Cosmology: Novel Forms of Early Dark Energy
Adam Smith, Philippe Brax, Carsten van de Bruck +2
We study the cosmology of multi-field Dark Energy, using a well-motivated axio-dilaton model that contains the minimal number of fields to have the 2-derivative sigma-model interac…
CMB Implications of Multi-field Axio-dilaton Cosmology
Adam Smith, Maria Mylova, Philippe Brax +3
Axio-dilaton models are among the simplest scalar-tensor theories that contain the two-derivative interactions that naturally compete at low energies with the two-derivative inter-…
4D de Sitter from String Theory via 6D Supergravity
C. P. Burgess, F. Muia, F. Quevedo
We obtain de Sitter (dS) solutions from controlled string-theory constructions. We review how minimal gauged chiral 6D supergravity evades standard dS no-go theorems by having a po…
On the EFT of Dyon-Monopole Catalysis
S. Bogojevic, C. P. Burgess
Monopole-fermion (and dyon-fermion) interactions provide a famous example where scattering from a compact object gives a cross section much larger than the object's geometrical siz…
Axio-Chameleons: A Novel String-Friendly Multi-field Screening Mechanism
Philippe Brax, C. P. Burgess, F. Quevedo
Scalar-tensor theories with the shift symmetries required by light scalars are well-explored modifications to GR. For these, two-derivative scalar self-interactions usually dominat…
Yoga Dark Energy: Natural Relaxation and Other Dark Implications of a Supersymmetric Gravity Sector
C. P. Burgess, Danielle Dineen, F. Quevedo
We construct a class of 4D `yoga' (naturally relaxed) models for which the gravitational response of heavy-particle vacuum energies is strongly suppressed. The models contain three…
Who's Afraid of the Supersymmetric Dark? The Standard Model vs Low-Energy Supergravity
C. P. Burgess, F. Quevedo
Use of supergravity equations in astronomy and late-universe cosmology is often criticized on three grounds: (i) phenomenological success usually depends on the supergravity form f…
Axion Homeopathy: Screening Dilaton Interactions
C. P. Burgess, F. Quevedo
Cosmologically active Brans-Dicke (or dilaton) scalar fields are generically ruled out by solar system tests of gravity unless their couplings to ordinary matter are much suppresse…