BCS-BEC crossover in a relativistic boson-fermion model with a synthetic gauge field Xiaoyong Guo, Zimeng Chi, Zaijun Wang, Jie Peng and Qiang Zheng Eur. Phys. J. D, 70 11 (2016) 230 Published online: 01 November 2016 DOI: 10.1140/epjd/e2016-70374-3