Boosted top quarks in the peak region with N<sup>3</sup>LL resummation

Author(s)
Brad Bachu, Andre H. Hoang, Vicent Mateu, Aditya Pathak, Iain W. Stewart
Abstract

We present results for the 2-jettiness differential distribution for boosted top quark pairs produced in e+e collisions in the peak region accounting for QCD large-logarithm resummation at next-to-next-to-next-to-leading logarithmic order and fixed-order corrections to matrix elements at next-to-next-to-leading order calculated in the framework of soft-collinear effective theory and boosted heavy quark effective theory. Electroweak and finite-width effects are included at leading order. We study the perturbative convergence of the cross section in the pole and MSR mass schemes, with and without soft gap subtractions. We find that there is a partial cancellation between the pole mass and soft function renormalons. When renormalon subtractions concerning the top mass and the soft function are implemented, the perturbative uncertainties are, however, systematically smaller and an improvement in the stability of the peak position is observed. We find that the top MSR mass may be determined with perturbative uncertainties well below 100 MeV from the peak position of the 2-jettiness distribution. This result has important applications for Monte Carlo top quark mass calibrations.

Organisation(s)
Particle Physics, Research Platform Erwin Schrödinger International Institute for Mathematics and Physics
External organisation(s)
Massachusetts Institute of Technology, Universidad de Salamanca, Consejo Superior de Investigaciones Científicas (CSIC), University of Manchester, Princeton University
Journal
Physical Review D
Volume
104
No. of pages
29
ISSN
2470-0010
DOI
https://doi.org/10.1103/PhysRevD.104.014026
Publication date
07-2021
Peer reviewed
Yes
Austrian Fields of Science 2012
103034 Particle physics
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/boosted-top-quarks-in-the-peak-region-with-n3ll-resummation(039e0f80-cbf1-432a-a8f9-8642fddbe86b).html