Sigma-assisted low scale composite Goldstone–Higgs Diogo Buarque Franzosi, Giacomo Cacciapaglia and Aldo Deandrea Eur. Phys. J. C, 80 1 (2020) 28 Published online: 11 January 2020 DOI: 10.1140/epjc/s10052-019-7572-z