69 citations · 88 across the 5 of their papers we have counts for
5 papers
Novel flavour-changing neutral currents in the top quark sector
Nuno Castro, Mikael Chala, Ana Peixoto +1
We demonstrate that flavour-changing neutral currents in the top sector, mediated by leptophilic scalars at the electroweak scale, can easily arise in scenarios of new physics, and…
Gravitational wave and collider probes of a triplet Higgs sector with a low cutoff
Mikael Chala, Maria Ramos, Michael Spannowsky
We study the scalar triplet extension of the standard model with a low cutoff, preventing large corrections to the quadratic masses that would otherwise worsen the hierarchy proble…
Dynamics of Robertson-Walker spacetimes with diffusion
Artur Alho, Simone Calogero, Maria P. Machado Ramos +1
We study the dynamics of spatially homogeneous and isotropic spacetimes containing a fluid undergoing microscopic velocity diffusion in a cosmological scalar field. After deriving…
Studying conformally flat spacetimes with an elastic stress energy tensor using 1+3 formalism
I. Brito, M. P. Machado Ramos
Conformally flat spacetimes with an elastic stress energy tensor given by a diagonal trace-free anisotropic pressure tensor are investigated using 1+3 formalism. We show how the nu…
Type O pure radiation metrics with a cosmological constant
S. Brian Edgar, M. P. Machado Ramos
In this paper we complete the integration of the conformally flat pure radiation spacetimes with a non-zero cosmological constant , and , by considering the case $Λ+τ\ba…