Speaker
Yusuke Yamada
(Waseda institute for advanced study)
Description
Particles coupled to inflaton have effective time-dependent masses due to the background inflaton field, which leads to the creation of the particles from the vacuum via non-perturbative processes known as preheating. We consider the decay process of such dressed particles by using the Furry perturbation theory, where the time-dependent mass is treated non-perturbatively whereas the interactions between dressed particles perturbatively. We show that we can reproduce the decay process expected from un-dressed particle scattering. Furthermore, we find a daughter particle production process that is naively forbidden kinematically. We discuss its relation to instant preheating scenario.
Primary author
Yusuke Yamada
(Waseda institute for advanced study)
Co-author
Dr
Hidetoshi Taya
(RIKEN, iTHEMS)
