Vacuum alignment in a composite 2HDM

Cai, Chengfeng (0000 0001 2360 039X, School of Physics, Sun-Yat Sen University, No. 135, Xingang Xi Road, Guangzhou, 510275, P.R. China) ; Zhang, Hong-Hao (0000 0001 2360 039X, School of Physics, Sun-Yat Sen University, No. 135, Xingang Xi Road, Guangzhou, 510275, P.R. China) ; Cacciapaglia, Giacomo (0000 0001 2150 7757, Université de Lyon, 92 rue Pasteur, 69361, Lyon Cedex 08, France) (0000 0001 2153 961X, Institut de Physique Nucléaire de Lyon, UMR5822 CNRS/IN2P3, 4 rue Enrico Fermi, 69622, Villeurbanne Cedex, France)

02 February 2019

Abstract: We study in detail the vacuum structure of a composite two Higgs doublet model based on a minimal underlying theory with 3 Dirac fermions in pseudo-real representations of the condensing gauge interactions, leading to the SU(6)/Sp(6) symmetry breaking pattern. We find that, independently on the source of top mass, the most general CP-conserving vacuum is characterised by three non-vanishing angles. A special case occurs if the Yukawas are aligned, leading to a single angle. In the latter case, a Dark Matter candidate arises, protected by a global U(1) symmetry.


Published in: JHEP 1901 (2019) 130
Published by: Springer/SISSA
DOI: 10.1007/JHEP01(2019)130
arXiv: 1805.07619
License: CC-BY-4.0



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