Exploring small-angle emissions in charm quark jets in proton-proton collisions at $\sqrt{s}$ = 5.02 TeV
Abstract
A measurement of the angular structure of inclusive jets and those containing a prompt D meson in proton-proton collisions at the LHC at a center-of-mass energy of 5.02 TeV is presented. The data corresponding to an integrated luminosity of 301 pb were collected by the CMS experiment in 2017. Two jet grooming algorithms, late- and soft drop, are used to study the intrajet radiation pattern using iterative CambridgeAachen declustering. The splitting-angle distributions of jets with transverse momentum () of around 100 GeV, obtained with these two algorithms, show that there is a shift of the distribution for jets containing a prompt D meson with respect to inclusive jets. The suppression of emissions at small angles observed in the late- grooming approach is consistent with the dead-cone effect, whereas the similar suppression for splittings selected with the soft-drop algorithm appears to be induced by gluon splitting to charm quark-antiquark pairs at large angles. The measured distributions are corrected to the particle level and can be used to constrain model predictions for the substructure of high- charm quark jets.
Cite
@article{arxiv.2507.13469,
title = {Exploring small-angle emissions in charm quark jets in proton-proton collisions at $\sqrt{s}$ = 5.02 TeV},
author = {CMS Collaboration},
journal= {arXiv preprint arXiv:2507.13469},
year = {2026}
}
Comments
Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIN-24-007 (CMS Public Pages)