Assessing the sensitivity of Energy-Energy Correlations in e⁺e^- annihilation to TMD dynamics

2025/07/23 by Alejandro Bris Cuerpo, Cuerpo, Alejandro Bris, Ignazio Scimemi +3 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2507.17478

openalex publication_date 2025/07/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We critically examine the back-to-back limit of the energy-energy correlation (EEC) in e⁺e^- annihilation as a potential source of information on the Collins-Soper kernel and the strong coupling constant. The analysis is performed within the framework of transverse momentum dependent (TMD) factorization at next-to-next-to-next-to-next-to-leading logarithmic (N⁴LL) accuracy, using a global fit to all available experimental data. Contrary to previous claims, we demonstrate that the current data do not provide meaningful constraints on either the Collins-Soper kernel or α_s.

Citations

• Dihadron fragmentation framework for near-side energy-energy correlators
• Dihadron Fragmentation and the Confinement Transition in Energy Correlators
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Cited by

• Drell--Yan lepton pair production at low invariant masses: transverse-momentum resummation and non-perturbative effects in QCD

Related

• Determination of the strong coupling constant and the Collins-Soper kernel from the energy-energy correlator in e⁺e^- collisions
• Moment analysis of energy spectra and the effect of running coupling
• Universality in the Near-Side Energy-Energy Correlator
• TMDs from Semi-inclusive Energy Correlators
• Analytic calculation of Energy-Energy Correlation in e⁺ e^- annihilation at NLO