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  • Open Access

Gluon Polarimetry with Energy-Energy Correlators

Yu-Kun Song1,*, Shu-Yi Wei2,†, Lei Yang2,‡, and Jian Zhou2,3,§

  • 1School of Physics and Technology, University of Jinan, Jinan, Shandong 250022, China
  • 2Institute of Frontier and Interdisciplinary Science, Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Qingdao, Shandong 266237, China
  • 3Southern Center for Nuclear-Science Theory (SCNT), Institute of Modern Physics, Chinese Academy of Sciences, HuiZhou, Guangdong 516000, China

  • *Contact author: sps_songyk@ujn.edu.cn
  • †Contact author: shuyi@sdu.edu.cn
  • ‡Contact author: lei.yang@mail.sdu.edu.cn
  • §Contact author: jzhou@sdu.edu.cn
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Phys. Rev. Lett. 136, 131901 – Published 31 March, 2026

DOI: https://doi.org/10.1103/j24j-ydvy

Abstract

We propose a novel method to probe gluon linear polarization via energy correlations in hard scattering processes. This approach exploits the characteristic cos2ϕ azimuthal modulation in single- and two-point energy correlations within jets initiated by polarized gluons. In contrast to conventional techniques that rely on kt resummation or intricate jet substructure observables, our method offers a theoretically robust and experimentally accessible avenue for gluon polarimetry. We perform an all-order analysis within the Ciafaloni-Catani-Fiorani-Marchesini formalism, incorporating coherent branching effects to achieve improved precision. Our predictions can be tested at current and future facilities, including the LHC, RHIC, HERA, and the EIC.

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Phys. Rev. Lett. 136, 131901– Published 31 March, 2026
  • Received 5 October 2025
  • Revised 19 January 2026
  • Accepted 12 March 2026
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