Creation and Evolution of Particle Number Asymmetry in an Expanding Universe
- Authors: Morozumi T.1, Nagao K.I.2, Adam A.S.1, Takata H.3
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Affiliations:
- Graduate School of Science, Core of Research for Energetic Universe, Hiroshima University
- National Institute of Technology, Niihama College
- Tomsk State Pedagogical University
- Issue: Vol 59, No 11 (2017)
- Pages: 1852-1856
- Section: Article
- URL: https://journal-vniispk.ru/1064-8887/article/view/239128
- DOI: https://doi.org/10.1007/s11182-017-0986-x
- ID: 239128
Cite item
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
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