Dynamical grooming of QCD jets
Abstract
We propose a new class of infrared-collinear (IRC) and Sudakov safe observables with an associated jet grooming technique that removes dynamically soft and large angle branches. It is based on identifying the hardest branch in the Cambridge/Aachen re-clustering sequence and discarding prior splittings that occur at larger angles. This leads to a dynamically generated cut-off on the phase space of the tagged splitting that is encoded in a Sudakov form factor. In this exploratory study we focus on the mass and momentum sharing distributions of the tagged splitting which we analyze analytically to modified leading logarithmic accuracy and compare to Monte-Carlo simulations.
Cite
@article{arxiv.1911.00375,
title = {Dynamical grooming of QCD jets},
author = {Yacine Mehtar-Tani and Alba Soto-Ontoso and Konrad Tywoniuk},
journal= {arXiv preprint arXiv:1911.00375},
year = {2020}
}
Comments
10 pages, 11 figures. v2: included discussion on gluon-initiated jets; accepted for publication in PRD