Groomed jet mass as a direct probe of collinear parton dynamics Daniele Anderle, Mrinal Dasgupta, Basem Kamal El-Menoufi, Marco Guzzi and Jack Helliwell Eur. Phys. J. C, 80 9 (2020) 827 Published online: 05 September 2020 DOI: 10.1140/epjc/s10052-020-8411-y