Abstract: Many motivated extensions of the Standard Model of particle physics predict the existence of cosmic strings. Gravitational waves (GWs) originating from the dynamics of the resulting cosmic string network have the ability to probe many otherwise inaccessible properties of the early universe. In this study we show how the spectrum of GWsfrom a cosmic string network can be used … Read More
Abstract: In this talk, I will present exciting phenomenological opportunities involving the Higgs boson in the quest for new physics. Special attention will be given to the off-shell Higgs measurement. I will show that by probing the Higgs sector at high energy scales through off-shell production, we can potentially shed light on the naturalness problem of the Higgs mass, arguably … Read More
A period of entropy dilution in the early universe, in which only the standard model plasma heats up, while the dark sector plasma does not, can open up parameter space for thermal relic dark matter models. Taking as an example fermion dark matter with dark photon mediator we find that a diluted thermal relic dark matter with mass as light … Read More
Abstract: Dark matter may have its main appearance as macroscopic matter instead of a free particle state. In this talk, I will show that this could be true even in the simplest Higgs-portal dark matter model. The main form of dark matter is a non-topological soliton state with an energy density of the electroweak scale and a mass of one … Read More
There is a substantial effort in the physics community to search for dark matter interactions with the Standard Model of particle physics. Collisions between dark matter particles and baryons exchange heat and momentum in the early Universe, enabling a search for dark matter interactions using cosmological observations in a parameter space that is complementary to that of direct detection. In … Read More
ABSTRACT: Local measurements of the Hubble parameter are increasingly in tension with the value inferred from a LCDM fit to the cosmic microwave background (CMB) and baryon acoustic oscillation (BAO) data. A general class of solutions to this tension involves temporarily increasing the energy density of the Universe close to the epoch of matter-radiation equality to reduce the size of … Read More
Abstract Conventionally, the main focus for the cosmic evolution of our universe has been on descriptions in terms of particles: dark matter (DM) as massive particle, and dark radiation, if existing at all, in the form of massless or very light particle. In this talk, I will discuss a scenario where conformal field theory (CFT) plays a crucial role in … Read More
Abstract: The study of correlation functions of density perturbations could shed light on the interactions of the inflaton with other particles during the epoch of primordial inflation. In particular, the detection of an oscillating pattern in the bispectrum would imply the presence of heavy particles at a scale close to the Hubble rate during inflation. A minimal scenario providing this … Read More
Abstract: Measurements of the Cosmic Microwave Background and the large-scale structure of the universe have made it possible to determine with great precision the universe’s inventory, as well as properties of its initial conditions. However, there are profound questions that remain unanswered. Cosmological observations and galaxy dynamics seem to imply that 84% of all matter in the universe is composed … Read More
Abstract: The upcoming Deep Underground Neutrino Experiment will enable precision measurements of physics in the neutrino sector, a long-standing goal since the phenomenon of neutrino oscillations was observed. In order to perform such ambitious goals, DUNE will consist of argon-based detectors: a 40 kiloton liquid argon far detector, and several components at its near detector site at Fermilab. Included in … Read More