Hard-state accretion disk winds from black holes: the revealing case of MAXI J1820+070 by Munoz-Darias, T, Jimenez-Ibarra, F, Panizo-Espinar, G, Casares, J, Sanchez, DM, Ponti, G, Fender, RP, Buckley, DAH, Garnavich, P, Torres, MAP, Armas Padilla, M, Charles, PA, Corral-Santana, JM, Kajava, JJE, Kotze, EJ, Littlefield, C, Sanchez-Sierras, J, Steeghs, D, Thomas, J