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Flow between Extremal One-Point Energy Correlators in QCD

Marc Riembau1,2 and Minho Son3

  • 1Theoretical Physics Department, CERN, 1211 Geneva 23, Switzerland
  • 2Theoretical Particle Physics Laboratory, Institute of Physics, EPFL, 1015 Lausanne, Switzerland
  • 3Department of Physics, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea

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Phys. Rev. Lett. 136, 101901 – Published 11 March, 2026

DOI: https://doi.org/10.1103/lc5m-kwgv

Abstract

The energy density generated by a vector current is characterized by a single parameter aE bounded by unitarity to −1/2≤aE≤1, with extremal values saturated by free theories of different matter content. Through confinement, QCD transmutes fermionic matter into scalars, revealing a nontrivial flow between extremal correlators. We reconstruct this flow using perturbative QCD and chiral perturbation theory. The observable is accessible with currently available experimental data.

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Phys. Rev. Lett. 136, 101901– Published 11 March, 2026
  • Received 25 September 2025
  • Revised 15 January 2026
  • Accepted 2 February 2026
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