Sponsor
This work was facilitated in part by the Portland Institute for Computational Science and its resources acquired using NSF Grant DMS 1624776.
Document Type
Pre-Print
Publication Date
6-2020
Subjects
Electron-positron interactions, Positron annihilation, Jets (Nuclear physics), Particles (Nuclear physics), Renormalization (Physics), Perturbation (Quantum dynamics)
Abstract
Jet grooming has emerged as a necessary and powerful tool in a precision jet physics program. In this paper, we present three results on jet grooming in perturbation theory, focusing on heavy jet mass in e+e− → hadrons collisions, groomed with the modified mass drop tagger. First, we calculate the analytic cross section at leading-order. Second, using the leading-order result and numerical results through next-to-next-to-leading order, we show that cusps in the distribution on the interior of phase space at leading-order are softened at higher orders. Finally, using analytic and numerical results, we show that terms that violate the assumptions of the factorization theorem for groomed jet mass are numerically much smaller than expected from power counting. These results provide important information regarding the convergence of perturbation theory for groomed jet observables and reliable estimates for residual uncertainties in a precision calculation.
Persistent Identifier
https://archives.pdx.edu/ds/psu/33298
Citation Details
Larkoski, Andrew J., "Improving the Understanding of Jet Grooming in Perturbation Theory" (2020). Portland Institute for Computational Science Publications. 18.
https://archives.pdx.edu/ds/psu/33298
Description
This is the pre-print version of a work. Paper is available in arXiv and can be found online: https://arxiv.org/abs/2006.14680