Gordon Research Seminar in Particle Physics: Pushing the Frontiers of Particle Physics During the LHC Run II Era

Session

The "cosmic frontier" and the search for New Physics in outer space

25 Jun 2017, 13:30

Hong Kong University of Science and Technology (HKUST)

Conveners

The "cosmic frontier" and the search for New Physics in outer space: The "cosmic frontier" and the search for New Physics in outer space

• Yi Wang

Description

The final session will be devoted to the connection between particle physics and cosmology and astrophysics. This includes the early universe (baryogenesis, DM production, ...) and astroparticle physics (cosmic rays, indirect DM searches).

38. Distinguishing between warm dark matter and late kinetic decoupling using CMB spectral distortions

James Diacoumis

25/06/2017, 13:30

The damping of perturbations in the early universe produces a distortion in the energy spectrum of the CMB photons which depends intimately on the properties of the photon temperature transfer functions. Here we propose a new method for probing dark matter models on extremely small-scales by looking at how these models affect the evolution of the photon transfer functions. We explore the...

39. Light Dark Matter in the SHiP experiment

Inar Timiryasov

25/06/2017, 13:45

The baryon asymmetry of the Universe could originate from the lepton asymmetry which was produced at relatively low temperatures. Using a model with three right-handed neutrinos ($\nu$MSM) as an example, we demonstrate how to obtain a kinetic equation for the baryon number density and show in which cases this accurate treatment could be important.

40. The cosmic lepton asymmetry and neutrino flavor transformation

Lucas Johns

25/06/2017, 14:00

A cosmic lepton asymmetry much larger than its baryonic counterpart is a prerequisite for the resonant production of sterile neutrino dark matter and is associated with a number of baryogenesis mechanisms. Incidentally, a lepton asymmetry can also dramatically affect the flavor transformation of the active neutrinos in the early universe. I will explain how a lepton asymmetry renders the...

41. Stochastic gravitational wave background from binary primordial black hole mergers

Sai Wang

25/06/2017, 14:15

The Advanced LIGO's discovery of gravitational-wave events GW150914 and GW151226 has stimulated extensive studies on the origin of binary black holes. Supposing the gravitational-wave events could be explained by binary primordial black hole mergers, we investigated the corresponding stochastic gravitational-wave background and pointed out the possibility to detect this background by the...