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pro vyhledávání: '"Ovadia, Rotem"'
It is usually assumed that $4D$ instantons can only arise in non-Abelian theories. In this paper we re-examine this conventional wisdom by explicitly constructing instantons in an Abelian gauge theory: ${\rm QED}_4$ with $N_f$ flavors of Dirac fermio
Externí odkaz:
http://arxiv.org/abs/2406.13738
Axion-like-particles are a well-motivated extension of the Standard Model that can mediate interactions between the dark matter and ordinary matter. Here we consider an axion portal between the two sectors, where the axion couples to dark matter and
Externí odkaz:
http://arxiv.org/abs/2306.03128