Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Emond, William T."'
Autor:
González, Mariana Carrillo, Emond, William T., Moynihan, Nathan, Rumbutis, Justinas, White, Chris D.
The double copy relates quantities in gauge, gravity and related theories. A well-known procedure for relating exact classical solutions is the Weyl double copy in four spacetime dimensions, and a three-dimensional analogue of this -- the Cotton doub
Externí odkaz:
http://arxiv.org/abs/2212.04783
We study black holes in a modified gravity scenario involving a scalar field quadratically coupled to the Gauss-Bonnet invariant. The scalar is assumed to be in a spontaneously broken phase at spatial infinity due to a bare Higgs-like potential. For
Externí odkaz:
http://arxiv.org/abs/2207.03944
Autor:
Emond, William T., Moynihan, Nathan
We construct classical curvature spinors in topologically massive gauge theory and topologically massive gravity, expressed in terms of massive three-particle amplitudes. We show that when the amplitudes double copy, the curvature spinors satisfy the
Externí odkaz:
http://arxiv.org/abs/2202.10499
We investigate the combined effect of fluxes and higher-order curvature corrections, in the form of the Gauss-Bonnet term, on the existence of de Sitter vacua in a heterotic string inspired framework, compactified on spheres and tori. We first gain s
Externí odkaz:
http://arxiv.org/abs/2112.05771
We formulate Wilson loop observables as products of eikonal Wilson lines given in terms of on-shell scattering amplitudes. Using these, we derive the Dirac-Schwinger-Zwanziger quantization condition and its gravitational (Taub-NUT) double copy, where
Externí odkaz:
http://arxiv.org/abs/2109.11531
Publikováno v:
JCAP01(2022)057
Appearance of cosmic strings in the early Universe is a common manifestation of new physics typically linked to some high energy scale. In this paper, we discuss a different situation, where a model underlying cosmic string formation is approximately
Externí odkaz:
http://arxiv.org/abs/2108.05377
We examine the double copy structure of anyons in gauge theory and gravity. Using on-shell amplitude techniques, we construct little group covariant spinor-helicity variables describing massive particles with spin, which together with locality and un
Externí odkaz:
http://arxiv.org/abs/2103.10416
Electric-magnetic duality, the Newman-Janis shift, and the double copy all act by elementary operations on three-point amplitudes. At the same time, they generate a network of interesting classical solutions spanning from the Coulomb charge via the d
Externí odkaz:
http://arxiv.org/abs/2010.07861
Publikováno v:
Phys. Rev. D 102, 083513 (2020)
One of the most appealing approaches to ease the Hubble tension is the inclusion of an early dark energy (EDE) component that adds energy to the Universe in a narrow redshift window around the time of recombination and dilutes faster than radiation a
Externí odkaz:
http://arxiv.org/abs/2005.14053
Autor:
Braglia, Matteo, Ballardini, Mario, Emond, William T., Finelli, Fabio, Gumrukcuoglu, A. Emir, Koyama, Kazuya, Paoletti, Daniela
Publikováno v:
Phys. Rev. D 102, 023529 (2020)
We provide further evidence that a massless cosmological scalar field with a non-minimal coupling to the Ricci curvature of the type $M^2_{\rm pl}(1+\xi \sigma^n/M_{\rm pl}^n) $ alleviates the existing tension between local measurements of the Hubble
Externí odkaz:
http://arxiv.org/abs/2004.11161