Eur. Phys. J. C (2018) 78: 96
https://doi.org/10.1140/epjc/s10052-018-5579-5

Letter

The jet mass distribution after Soft Drop

¹ Dipartimento di Fisica, Università di Genova and INFN, Sezione di Genova, Via Dodecaneso 33, 16146, Genoa, Italy
² Deutsches Elektronen-Synchroton DESY, Notkestraße 85, 22607, Hamburg, Germany
³ IPhT, CEA Saclay, CNRS UMR 3681, 91191, Gif-Sur-Yvette, France

^* e-mail: gregory.soyez@ipht.fr

Received: 21 December 2017
Accepted: 22 January 2018
Published online: 2 February 2018

Abstract

We present a first-principle computation of the mass distribution of jets which have undergone the grooming procedure known as Soft Drop. This calculation includes the resummation of the large logarithms of the jet mass over its transverse momentum, up to next-to-logarithmic accuracy, matched to exact fixed-order results at next-to-leading order. We also include non-perturbative corrections obtained from Monte-Carlo simulations and discuss analytic expressions for hadronisation and Underlying Event effects.