Energy-energy correlation in hadronic Higgs decays: analytic results and phenomenology at NLO

• Published in: The journal of high energy physics Vol. 2021; no. 2
• Main Authors: Gao, Jun, Shtabovenko, Vladyslav, Yang, Tong-Zhi
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 24.02.2021; Springer Nature B.V
• Subjects: Classical and Quantum Gravitation; Correlation analysis; Elementary Particles; Energy; Error analysis; Factories; High energy physics; Investigations; Partons; Perturbation theory; Phenomenology; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quarks; Regular Article - Theoretical Physics; Relativity Theory; String Theory; NLO Computations; Jets
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP02(2021)210

A bstract In this work we complete the investigation of the recently introduced energy-energy correlation (EEC) function in hadronic Higgs decays at next-to-leading order (NLO) in fixed-order perturbation theory in the limit of vanishing light quark masses. The full analytic NLO result for the previously unknown EEC in the H → q q ¯ + X channel is given in terms of classical polylogarithms and cross-checked against a numerical calculation. In addition to that, we discuss further corrections to predictions of the Higgs EEC event shape variable, including quark mass corrections, effects of parton shower and hadronization. We also estimate the statistical error on the measurements of the Higgs EEC at future Higgs factories and compare with the current perturbative uncertainty.