Matter–antimatter asymmetry induced by a running vacuum coupling
Abstract We show that a CP-violating interaction induced by a derivative coupling between the running vacuum and a non-conserving baryon current may dynamically break CPT and trigger baryogenesis through an effective chemical potential. By assuming a non-singular class of running vacuum cosmologies...
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2017-12-01
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Series: | European Physical Journal C: Particles and Fields |
Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-017-5429-x |
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doaj-87b1ac547c5a440d9384eee7e1aa13bb2020-11-25T01:31:59ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522017-12-0177121610.1140/epjc/s10052-017-5429-xMatter–antimatter asymmetry induced by a running vacuum couplingJ. A. S. Lima0D. Singleton1Departamento de Astronomia, Universidade de São PauloDepartment of Physics, California State University FresnoAbstract We show that a CP-violating interaction induced by a derivative coupling between the running vacuum and a non-conserving baryon current may dynamically break CPT and trigger baryogenesis through an effective chemical potential. By assuming a non-singular class of running vacuum cosmologies which provides a complete cosmic history (from an early inflationary de Sitter stage to the present day quasi-de Sitter acceleration), it is found that an acceptable baryon asymmetry is generated for many different choices of the model parameters. It is interesting that the same ingredient (running vacuum energy density) addresses several open cosmological questions/problems: avoids the initial singularity, provides a smooth exit for primordial inflation, alleviates both the coincidence and the cosmological constant problems, and, finally, is also capable of explaining the generation of matter-antimatter asymmetry in the very early Universe.http://link.springer.com/article/10.1140/epjc/s10052-017-5429-x |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
J. A. S. Lima D. Singleton |
spellingShingle |
J. A. S. Lima D. Singleton Matter–antimatter asymmetry induced by a running vacuum coupling European Physical Journal C: Particles and Fields |
author_facet |
J. A. S. Lima D. Singleton |
author_sort |
J. A. S. Lima |
title |
Matter–antimatter asymmetry induced by a running vacuum coupling |
title_short |
Matter–antimatter asymmetry induced by a running vacuum coupling |
title_full |
Matter–antimatter asymmetry induced by a running vacuum coupling |
title_fullStr |
Matter–antimatter asymmetry induced by a running vacuum coupling |
title_full_unstemmed |
Matter–antimatter asymmetry induced by a running vacuum coupling |
title_sort |
matter–antimatter asymmetry induced by a running vacuum coupling |
publisher |
SpringerOpen |
series |
European Physical Journal C: Particles and Fields |
issn |
1434-6044 1434-6052 |
publishDate |
2017-12-01 |
description |
Abstract We show that a CP-violating interaction induced by a derivative coupling between the running vacuum and a non-conserving baryon current may dynamically break CPT and trigger baryogenesis through an effective chemical potential. By assuming a non-singular class of running vacuum cosmologies which provides a complete cosmic history (from an early inflationary de Sitter stage to the present day quasi-de Sitter acceleration), it is found that an acceptable baryon asymmetry is generated for many different choices of the model parameters. It is interesting that the same ingredient (running vacuum energy density) addresses several open cosmological questions/problems: avoids the initial singularity, provides a smooth exit for primordial inflation, alleviates both the coincidence and the cosmological constant problems, and, finally, is also capable of explaining the generation of matter-antimatter asymmetry in the very early Universe. |
url |
http://link.springer.com/article/10.1140/epjc/s10052-017-5429-x |
work_keys_str_mv |
AT jaslima matterantimatterasymmetryinducedbyarunningvacuumcoupling AT dsingleton matterantimatterasymmetryinducedbyarunningvacuumcoupling |
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1725083978064461824 |