Determination of the strong coupling constant and the Collins-Soper kernel from the energy-energy correlator in e⁺e^- collisions

2024/10/28 by Zhong-Bo Kang, Kang, Zhong-Bo, Jani Penttala +2 · 2 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #High-Energy Particle Collisions Research #Optical properties and cooling technologies in crystalline materials

paper · pdf · doi:10.48550/arxiv.2410.21435

Abstract

We have conducted the first simultaneous global fit of the strong coupling constant α_s and the Collins-Soper (CS) kernel using the energy-energy correlators (EEC) of e⁺ e^- collisions in the back-to-back limit. This analysis, based on the transverse-momentum-dependent (TMD) factorization of EEC at next-to-next-to-next-to-leading logarithmic (\rmN³ \rmLL) accuracy, yields α_s consistent with the world average. We have tested two different parametrizations for the non-perturbative CS kernel and found both to align with results obtained from lattice QCD and fits on semi-inclusive deep inelastic scattering and Drell-Yan process.

Cited by

• First constraints on the nonperturbative gluon Collins-Soper kernel
• Assessing the sensitivity of Energy-Energy Correlations in e⁺e^- annihilation to TMD dynamics

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