452 citations · 3.5k across the 64 of their papers we have counts for
8 papers · 1 filter
A frame independent classification of single field inflationary models
Laur Järv, Kristjan Kannike, Luca Marzola +5
Seemingly unrelated models of inflation that originate from different physical setups yield, in some cases, identical predictions for the currently constrained inflationary observa…
On the Quantisation of Complex Higher Derivative Theories and Avoiding the Ostrogradsky Ghost
Martti Raidal, Hardi Veermäe
Generic higher derivative theories are believed to be fundamentally unphysical because they contain Ostrogradsky ghosts. We show that within complex classical mechanics it is possi…
Evolving Planck Mass in Classically Scale-Invariant Theories
K. Kannike, M. Raidal, C. Spethmann +1
We consider classically scale-invariant theories with non-minimally coupled scalar fields, where the Planck mass and the hierarchy of physical scales are dynamically generated. The…
Heavy spin-2 Dark Matter
Eugeny Babichev, Luca Marzola, Martti Raidal +4
We provide further details on a recent proposal addressing the nature of the dark sectors in cosmology and demonstrate that all current observations related to Dark Matter can be e…
Gravitational Origin of Dark Matter
Eugeny Babichev, Luca Marzola, Martti Raidal +4
Observational evidence for the existence of Dark Matter is limited to its gravitational effects. The extensive program for dedicated searches has yielded null results so far, chall…
Polarization observables for millicharged particles in photon collisions
Emidio Gabrielli, Luca Marzola, Edoardo Milotti +1
Particles in a hidden sector can potentially acquire a small electric charge through their interaction with the Standard Model and can consequently be observed as millicharged part…
Diffusion in the presence of a local attracting factor: Theory and some interdisciplinary applications
Hardi Veermäe, Marco Patriarca
We study a simple model of a random walker in d dimensions moving in the presence of a local heterogeneous attracting factor expressed in terms of an assigned space-dependent "attr…
Simulations of Galaxy Cluster Collisions with a Dark Plasma Component
Christian Spethmann, Hardi Veermäe, Tiit Sepp +4
Dark plasma is an intriguing form of self-interacting dark matter with an effective fluid-like behavior, which is well motivated by various theoretical particle physics models. We…