Creation and Evolution of Particle Number Asymmetry in an Expanding Universe


Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription Access

Abstract

We introduce a model which may generate particle number asymmetry in an expanding Universe. The model includes charge parity (CP) violating and particle number violating interactions. The model consists of a real scalar field and a complex scalar field. Starting with an initial condition specified by a density matrix, we show how the asymmetry is created through the interaction and how it evolves at later time. We compute the asymmetry using non-equilibrium quantum field theory and as a first test of the model, we study how the asymmetry evolves in the flat limit.

About the authors

T. Morozumi

Graduate School of Science, Core of Research for Energetic Universe, Hiroshima University

Author for correspondence.
Email: morozumi@hiroshima-u.ac.jp
Japan, Higashihiroshima

K. I. Nagao

National Institute of Technology, Niihama College

Email: morozumi@hiroshima-u.ac.jp
Japan, Niihama

A. S. Adam

Graduate School of Science, Core of Research for Energetic Universe, Hiroshima University

Email: morozumi@hiroshima-u.ac.jp
Japan, Higashihiroshima

H. Takata

Tomsk State Pedagogical University

Email: morozumi@hiroshima-u.ac.jp
Russian Federation, Tomsk

Supplementary files

Supplementary Files
Action
1. JATS XML

Copyright (c) 2017 Springer Science+Business Media New York