Speaker
Jorge Baeza-Ballesteros
(University of Valencia/IFIC)
Description
Cosmic strings are one-dimensional topological defects expected to form in the early-universe by many extensions of the Standar Model. In the case of axion models, the resulting strings, called global strings, then decay via the emission of particles and gravitational waves. In this talk, I will present a recent work in which we studied the simultaneous decay of isolated global string loops into scalar particles and GWs using field-theory lattice simulations. For any reasonable value of the string tension, we found the production of GW to be highly suppressed compared to decay into particle radiation. I will also briefly comment on the possible impacts of discretization and finite-volume effects.
