Fractal based observables to probe jet substructure of quarks and gluons
Abstract
New jet observables are defined which characterize both fractal and scale-dependent contributions to the distribution of hadrons in a jet. These infrared safe observables, named Extended Fractal Observables (EFOs), have been applied to quark-gluon discrimination to demonstrate their potential utility. The EFOs are found to be individually discriminating and only weakly correlated to variables used in existing discriminators. Consequently, their inclusion improves discriminator performance, as here demonstrated with particle level simulation from the parton shower.
Keywords
Cite
@article{arxiv.1703.00914,
title = {Fractal based observables to probe jet substructure of quarks and gluons},
author = {Joe Davighi and Philip Harris},
journal= {arXiv preprint arXiv:1703.00914},
year = {2018}
}
Comments
[v1] 11 pages 4 figures [v2] 13 pages, 5 figures [v3] 9 pages, 7 figures. v2 added comment on how the observable can preserve infrared safety, updated acknowledgement, added diagram about visualization. v3 added comparison of performance in Herwig and Pythia, added comparison between two different EFO fitting functions, and added figure showing dependence on transverse momentum