The energy-momentum tensor of spin-1 hadrons: formalism Wim Cosyn, Sabrina Cotogno, Adam Freese and Cédric Lorcé Eur. Phys. J. C, 79 6 (2019) 476 Published online: 05 June 2019 DOI: 10.1140/epjc/s10052-019-6981-3