CGC/saturation approach: an impact-parameter dependent model for diffraction production in DIS Carlos Contreras, Eugene Levin, Rodrigo Meneses and Irina Potashnikova Eur. Phys. J. C, 78 6 (2018) 475 Published online: 09 June 2018 DOI: 10.1140/epjc/s10052-018-5957-z