A generalized Higgs potential with two degenerate minima for a dark QCD matter scenario Matthias F. M. Lutz, Yonggoo Heo and Xiao-Yu Guo Eur. Phys. J. C, 80 4 (2020) 322 Published online: 15 April 2020 DOI: 10.1140/epjc/s10052-020-7884-z