Axion driven baryogenesis

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9 Scopus citations


We show that the axion gauge field coupling leads to tachyonic mass generation for the gauge fields when the axion field has a homogeneous and isotropic time dependent (i.e. cosmological) expectation value. In the context of the standard SU (3) × SU (2) × U (1) gauge group, it is possible to eliminate this instability in a thermal equilibrium environment, provided a finite chemical potential is introduced for B+L. This finite density environment that stabilizes the system, can be generated through B+L violating processes that take place with a considerable rate in the standard model at TeV temperatures. In this way, through a mechanism where CPT is spontaneously violated, baryogenesis can take place in a thermal equilibrium environment at TeV temperatures.

Original languageEnglish
Pages (from-to)108-114
Number of pages7
JournalPhysics Letters B
Issue number1-2
StatePublished - 6 Feb 1992

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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