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EFT for soft drop double differential cross sectionPathak, Aditya; orcid: 0000-0001-8149-2817; email: firstname.lastname@example.org; Stewart, Iain W.; Vaidya, Varun; Zoppi, Lorenzo; orcid: 0000-0002-9157-6907 (Springer Berlin Heidelberg, 2021-04-06)Abstract: We develop a factorization framework to compute the double differential cross section in soft drop groomed jet mass and groomed jet radius. We describe the effective theories in the large, intermediate, and small groomed jet radius regions defined by the interplay of the jet mass and the groomed jet radius measurement. As an application we present the NLL′ results for the perturbative moments that are related to the coefficients C1 and C2 that specify the leading hadronization corrections up to three universal parameters. We compare our results with Monte Carlo simulations and a calculation using the coherent branching method.