Event

Apr 04, 2019 3:45 pm - Nielsen Hall 170 - Colloquium
Rouzbeh Allahverdi
The Baryogenesis Problem and its Solutions

The constituents of atoms (protons, neutrons, and electrons) are known to have antiparticles (antiprotons, antineutrons, and positrons respectively). Yet, as far as we can see, the universe does not contain an appreciable amount of antimatter. Explaining the observed matter-antimatter asymmetry in the universe has been a major problem at the interface of particle physics and cosmology. In this talk, I will give a pedagogical review of dynamically generating this asymmetry (dubbed "baryogenesis"). After explaining the basic conditions that are necessary for baryogenesis to occur, I will go through some explicit particle physics examples and discuss possible predictions of baryogenesis models that can be tested in laboratory. Finally, I will present a simple testable model with an interesting complementarity among the constraints arising from particle physics and cosmology.