Pseudoscalar Yukawa Coupling Induced Helical Asymmetry in Fermionic Preheating

Ke FU, Li-Shuang Liu, Yu-Feng Wang +2

In this study, we investigate the fermionic helical asymmetry during preheating by introducing a model in which the Dirac field $\psi$ couples to the scalar inflaton $\varphi$ directly thro…