| Today, Wednesday, April 8, 2026 |
| Baryogenesis from Exploding Primordial Black Holes | |
| Alexandra Klipfel, MIT | |
| Event Type: Informal HEP Talk | |
| Time: 11:00 AM - 12:00 PM | |
| Location: 726 Broadway, 940, CCPP Seminar | |
| Abstract: Exploding primordial black holes can source baryon asymmetry soon after the electroweak phase transition, as high-energy Hawking radiation drives ultrarelativistic shocks in the surrounding plasma. The shocks and their trailing rarefaction waves delineate two bubble-like walls around a shell of super-heated fluid, in which electroweak symmetry is restored. These moving interfaces source chiral charge, which is converted to baryon number. Upon adding a simple CP-violating operator at the TeV scale, this mechanism yields the observed baryon asymmetry with minimal dependence on PBH model parameters. | |
| Dunsky / Weiner | |
| Event Type: HEP Journal Club | |
| Time: 12:30 PM - 1:30 PM | |
| Location: 726 Broadway, 940, CCPP Seminar | |
| Supercurrents and (partial) supersymmetry in 2d adjoint QCD and its generalizations | |
| Silviu Pufu, Princeton | |
| Event Type: HEP Seminar | |
| Time: 2:00 PM - 3:00 PM | |
| Location: 726 Broadway, 940, CCPP Seminar | |
| Abstract: The 1+1-dimensional adjoint QCD theory (namely SU(N) gauge theory coupled to a Majorana fermion in the adjoint representation of the gauge group) has the curious property that at a certain non-zero ratio of the fermion mass to the gauge coupling, it exhibits supersymmetry. I will shed some new light onto this phenomenon by constructing a gauge-invariant, Lorentz-covariant supercurrent, whose conservation relies on the presence of a quantum anomaly. Lastly, I will discuss generalizations of the adjoint QCD theory that exhibit supersymmetric sectors. | |