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Spectral distortion constraints on photon injection from low-mass decaying particles
Boris Bolliet, Jens Chluba, Richard Battye
Spectral distortions (SDs) of the cosmic microwave background (CMB) provide a powerful tool for studying particle physics. Here we compute the distortion signals from decaying part…
Comparison of different approaches to the quasi-static approximation in Horndeski models
Francesco Pace, Richard Battye, Emilio Bellini +3
A quasi-static approximation (QSA) for modified gravity can be applied in a number of ways. We consider three different analytical formulations based on applying this approximation…
Domain Wall Constraints on Two Higgs Doublet Models with Symmetry
Richard A. Battye, Apostolos Pilaftsis, Dominic G. Viatic
The Two Higgs Doublet Model (2HDM) with spontaneously broken symmetry predicts a production of domain walls at the electroweak scale. We derive cosmological constraints on mo…
Constraining cosmic polarization rotation and implications for primordial B-modes
Joel Williams, Aditya Rotti, Richard Battye
Cosmological Birefringence (CB) is a phenomenon, caused by parity violating modifications to electrodynamics, whereby the linear polarisation angle of light changes as photons trav…
Simulations of Domain Walls in Two Higgs Doublet Models
Richard A. Battye, Apostolos Pilaftsis, Dominic G. Viatic
The Two Higgs Doublet Model predicts the emergence of 3 distinct domain wall solutions arising from the breaking of 3 accidental global symmetries, , CP1 and CP2, at the elect…
SuperCLASS -- III. Weak lensing from radio and optical observations in Data Release 1
Ian Harrison, Michael L. Brown, Ben Tunbridge +17
We describe the first results on weak gravitational lensing from the SuperCLASS survey: the first survey specifically designed to measure the weak lensing effect in radio-wavelengt…