Spontaneous baryogenesis with large misalignment

We investigate the particle production by the Nambu-Goldstone boson in the spontaneous baryogenesis scenario for large misalignment angles. Studying numerically the case of an arbitrary initial phase, we reproduce the cubic dependence on the initial value of the phase of baryon asymmetry in the case of small oscillations and present our results for an initial phase close to π. Our calculations indicate that there is a saturation in particle production as the initial phase approaches π in Minkowski spacetime. Furthermore, we present numerical solutions in the Friedmann-Lemaître-Robertson-Walker (FLRW) spacetime in conformal time, where we demonstrate a strong dependence on the decay rate of the scalar field. We also discuss the probability distribution of the baryon asymmetry.