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Updated: Jul 12, 2026

Setting Limits on Supersymmetry Using Simplified Models
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Published on: November 15, 2013

Precise QCD Predictions for Hadron-in-Jet Production in e^{+}e^{-} Collisions.

Leonardo Bonino1, Aude Gehrmann-De Ridder1,2, Thomas Gehrmann1

  • 1Universität Zürich, Physik-Institut, Winterthurerstrasse 190, 8057 Zürich, Switzerland.

Physical Review Letters
|July 10, 2026
PubMed
Summary

This study computes hadron-in-jets production cross sections in electron-positron annihilation to next-to-next-to-leading order. Comparing with experimental data validates these precise theoretical predictions for fragmentation function studies.

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Area of Science:

  • High-energy particle physics
  • Quantum Chromodynamics (QCD)

Background:

  • Electron-positron annihilation provides a clean environment for studying fundamental particle interactions.
  • Understanding parton fragmentation into hadrons is crucial for interpreting experimental results.

Purpose of the Study:

  • To compute hadron-in-jets production cross sections to next-to-next-to-leading order (NNLO) in perturbative QCD.
  • To provide precise theoretical predictions for e^{+}e^{-}→2 jets and e^{+}e^{-}→3 jets processes.

Main Methods:

  • Perturbative Quantum Chromodynamics (pQCD) calculations.
  • Next-to-next-to-leading order (NNLO) precision.
  • Comparison with experimental data from the ALEPH experiment.

Main Results:

  • Newly computed NNLO cross sections for hadron-in-jets production.
  • Demonstration of the impact of these predictions on precision phenomenology.
  • Validation against ALEPH experimental measurements.

Conclusions:

  • The NNLO calculations offer improved theoretical precision for fragmentation function studies.
  • The results have significant implications for precision measurements in particle physics.
  • The study highlights the power of combining theoretical calculations with experimental data.