no code implementations • 3 Mar 2021 • Alexandros Karam, Tommi Markkanen, Luca Marzola, Sami Nurmi, Martti Raidal, Arttu Rajantie
We show that the observed primordial perturbations can be entirely sourced by a light spectator scalar field with a quartic potential, akin to the Higgs boson, provided that the field is sufficiently displaced from vacuum during inflation.
High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics
no code implementations • 26 Feb 2021 • Juan Carlos Criado, Abdelhak Djouadi, Niko Koivunen, Martti Raidal, Hardi Veermäe
Using an effective field theory approach for higher-spin fields, we derive the interactions of colour singlet and electrically neutral particles with a spin higher than unity, concentrating on the spin-3/2, spin-2, spin-5/2 and spin-3 cases.
High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Theory Nuclear Theory
1 code implementation • 4 Dec 2020 • Gert Hütsi, Martti Raidal, Ville Vaskonen, Hardi Veermäe
We analyse the LIGO-Virgo data, including the recently released GWTC-2 dataset, to test a hypothesis that the data contains more than one population of black holes.
Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena High Energy Physics - Phenomenology
2 code implementations • 21 Dec 2010 • Marco Cirelli, Gennaro Corcella, Andi Hektor, Gert Hütsi, Mario Kadastik, Paolo Panci, Martti Raidal, Filippo Sala, Alessandro Strumia
Using such propagation functions, we compute the energy spectra of electrons and positrons, antiprotons and antideuterons at the location of the Earth.
High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics
