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Analysis note: measurement of energy-energy correlator in $e^{+}e^{-}$ collisions at $91$ GeV with archived ALEPH data

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arxiv 2505.11828 v1 pith:ADV7Z55H submitted 2025-05-17 hep-ex nucl-ex

classification hep-exnucl-ex
keywords precisionarchiveddataalephanalysisangularback-to-backcollider
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Electron-positron ($e^+e^-$) collisions provide a clean environment for precision tests of Quantum Chromodynamics (QCD) due to the absence of hadronic initial-state effects. We present a novel analysis of archived ALEPH data from the Large Electron-Positron Collider at the $Z$ pole, leveraging energy-energy correlators (EECs) to study hadronic energy flow with unprecedented precision. The two-point EEC is measured as a function of the angular separation between particles spanning from the collinear to the back-to-back limits in a remarkably differential test of perturbative and non-perturbative QCD. The results are consistent with previous LEP measurements and provide significantly improved precision and finer angular binning resolution, especially at small angles and in the back-to-back limit. Comparisons with \textsc{pythia} 6 simulations show overall agreement, with deviations in key kinematic regions offering insights into hadronization. The measurement performed here connects to new opportunities for precision QCD studies in archived and future collider data.

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Forward citations

Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. AI Agents Can Already Autonomously Perform Experimental High Energy Physics

    hep-ex 2026-03 conditional novelty 7.0 of 10

    A scaffolded multi-agent system (JFC) lets Claude Code autonomously execute end-to-end HEP analyses on ALEPH, DELPHI, and CMS open data, including a claimed first LEP Lund-plane measurement.

  2. Energy-energy correlators inside single inclusive jets in heavy-ion collisions with CoLBT-hydro model

    hep-ph 2026-05 unverdicted novelty 6.0 of 10

    Updated CoLBT-hydro simulations with Q_M=2.0 GeV reproduce CMS in-jet EEC data, validate background subtraction, and show path-length and diffusion-wake effects.

  3. Quantum Scaling in Energy Correlators Beyond the Confinement Transition

    hep-ph 2025-07 conditional novelty 6.0 of 10

    In the post-confinement regime the small-angle energy-energy correlator scales with the collision energy through the J=5 DGLAP anomalous dimension, and the light-ray OPE coefficients are moments of the dihadron fragme...

  4. Analysis note: measurement of thrust in $e^{+}e^{-}$ collisions at $\sqrt{s}$ = 91 GeV with archived ALEPH data

    hep-ex 2025-07 conditional novelty 5.0 of 10

    Using archived ALEPH data, the authors produce a detector-corrected thrust distribution with machine-learning unbinned unfolding that matches the old ALEPH result and adds flexible per-event weights.

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