Top-quark mass extraction from tt¯j+X events at the LHC: theory predictions

Simone Alioli, Juan Fuster, Maria Vittoria Garzelli, Alessandro Gavardi, Adrian Irles, Davide Melini, Sven-Olaf Moch, Peter Uwer, Katharina Voß

Read on arXiv

arXiv
2203.07344
Date
2022-03-14
Frontier
Energy Frontier (EF)
Topical groups
Submitted by
Maria Vittoria Garzelli

Abstract

Past work has proven the possibility of extracting the top-quark mass, one of the fundamental parameters of the Standard Model, from the comparison of theory predictions and experimental measurements of differential cross-sections for tt¯j + X hadroproduction. Various experimental analyses in this respect have already been performed, and new ones are in preparation on the basis of the latest data from pp collisions collected at the Large Hadron Collider. We have produced and made public a comprehensive set of theoretical predictions for the relevant differential distributions, ready to be used for presently ongoing and forthcoming experimental analyses. We investigate the role of different theoretical inputs, in particular the factorization and renormalization scales, PDFs and top-quark mass renormalization schemes, and we quantify the uncertainties related to different choices for these inputs, providing recommendations.