Observational constraints and preheating in cuscuton inflation Phongpichit Channuie, Khamphee Karwan and Jakkrit Sangtawee Eur. Phys. J. C, 83 5 (2023) 421 Published online: 19 May 2023 DOI: 10.1140/epjc/s10052-023-11566-z