To B or not to B: Primordial magnetic fields from Weyl anomaly

  • Data: 08 maggio 2019 dalle 14:00 alle 15:00

  • Luogo: Aula Teorici, piano 2, via Irnerio 46, Bologna

Contatto di riferimento:

Partecipanti: Dott. Takeshi Kobayashi: ICTP Trieste

Abstract: For more than twenty years, it has been argued that the Weyl anomaly of quantum electrodynamics sources cosmological magnetic fields in the early universe. If true, this would be a natural way to produce the seed magnetic fields of our universe within the Standard Model. In this talk, I will examine this long-standing claim and show that there is actually no production of coherent magnetic fields from the Weyl anomaly, irrespective of the number of massless charged particles in the early universe. I will also comment on other possibilities for magnetic field generation.