Domain walls in Nelson-Barr axion model
Sign Up to like & getrecommendations! Published in 2024 at "Journal of High Energy Physics"
DOI: 10.1007/jhep09(2025)099
Abstract: We explore a concrete realization of a Nelson-Barr model addressing the strong CP problem with suppressed unfavorable corrections. This model has a scalar field that spontaneously breaks discrete symmetry, and its phase component can naturally… read more here.
Keywords: nelson barr; walls nelson; barr axion; axion ... See more keywords
Flavor constraints for a vector-like quark of Nelson-Barr type
Sign Up to like & getrecommendations! Published in 2021 at "Journal of High Energy Physics"
DOI: 10.1007/jhep11(2021)093
Abstract: Abstract The Nelson-Barr (NB) mechanism to solve the strong CP problem assumes CP conservation, arranges vanishing $$ \overline{\theta} $$ θ ¯ at tree-level and requires vector-like quarks (VLQs) to transmit the CP breaking to the… read more here.
Keywords: nelson barr; flavor constraints; vector like; type ... See more keywords
Nelson-Barr relaxion
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DOI: 10.1103/physrevd.99.035014
Abstract: Cosmological relaxation models in which the relaxion is identified with the QCD axion, generically fail to account for the smallness of the strong C P phase. We present a simple alternative solution to this “relaxion… read more here.
Keywords: barr relaxion; nelson barr; relaxion;