Nebot-Guinot, M. Ferrario, P. Martín-Albo, J. Muñoz Vidal, J. Gómez-Cadena, J.J. on behalf of the NEXT Collaboration Backgrounds and sensitivity of the NEXT double beta decay experiment Nuclear and particle physics proceedings. 10.1016/j.nuclphysbps.2015.10.006 2016 2016