Zobrazeno 1 - 10
of 669
pro vyhledávání: '"Shellard E"'
Publikováno v:
JCAP 09 (2024) 016
In this paper, we present the first comprehensive CMB data analysis of cosmological collider physics. New heavy particles during inflation can leave imprints in the primordial correlators which are observable in today's cosmological surveys. This rem
Externí odkaz:
http://arxiv.org/abs/2404.07203
We continue our studies of the evolution and cosmological consequences of current-carrying cosmic string networks, described by a charge-velocity-dependent one scale (CVOS) model. We present a detailed calculation of the effects of these networks on
Externí odkaz:
http://arxiv.org/abs/2403.16332
We provide a formulation of Stochastic Inflation in full general relativity that goes beyond the slow-roll and separate universe approximations. We show how gauge invariant Langevin source terms can be obtained for the complete set of Einstein equati
Externí odkaz:
http://arxiv.org/abs/2401.08530
In this paper, we perform an investigation into the effect of the string radius of curvature $R_\mathrm{\,Gaussian}$ on the magnitude and relative magnitude of the massive and massless radiation from axion (global) string configurations, motivated by
Externí odkaz:
http://arxiv.org/abs/2312.07701
We present a new independent pipeline for the CMB bispectrum estimation of primordial non-Gaussianity and release a public code for constraining bispectrum shapes of interest based on the Planck 2018 temperature and polarization data. The estimator c
Externí odkaz:
http://arxiv.org/abs/2305.14646
We consider the evolution of current-carrying cosmic string networks described by the charge-velocity-dependent one scale (CVOS) model beyond the linear equation of state regime, specifically focusing on the Witten superconducting model. We find that
Externí odkaz:
http://arxiv.org/abs/2304.00053
Autor:
Drew, Amelia, Shellard, E. P. S.
Publikováno v:
Phys. Rev. D, 107(4):043507, 2023
We implement adaptive mesh refinement (AMR) simulations of global topological strings using the public code, GRChombo. We perform a quantitative investigation of massive radiation from single sinusoidally displaced string configurations, studying a r
Externí odkaz:
http://arxiv.org/abs/2211.10184
We apply a recently developed formalism to study the evolution of a current-carrying string network under the simple but generic assumption of a linear equation of state. We demonstrate that the existence of a scaling solution with non-trivial curren
Externí odkaz:
http://arxiv.org/abs/2108.03147
Autor:
Clarke, Philip, Shellard, E. P. S.
Calculating the primordial bispectrum predicted by a model of inflation and comparing it to what we see in the sky is very computationally intensive, necessitating layers of approximations and limiting the models which can be constrained. Exploiting
Externí odkaz:
http://arxiv.org/abs/2012.08546
Publikováno v:
Phys. Rev. D 103, 043538 (2021)
We develop an analytic model to quantitatively describe the evolution of superconducting cosmic string networks. Specifically, we extend the velocity-dependent one-scale (VOS) model to incorporate arbitrary currents and charges on cosmic string world
Externí odkaz:
http://arxiv.org/abs/2011.09700