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Identified Hadron Production at Hadron Colliders in Next-to-Next-to-Leading-Order QCD
Michał Czakon1, Terry Generet2, Alexander Mitov2
1RWTH Aachen University, Institut für Theoretische Teilchenphysik und Kosmologie, D-52056 Aachen, Germany.
Physical Review Letters
|November 7, 2025
Summary
This study calculates the next-to-next-to leading order (NNLO) QCD corrections for hadron production at colliders. These advanced calculations significantly reduce uncertainties and improve precision for fragmentation functions.
Area of Science:
- High Energy Physics
- Quantum Chromodynamics (QCD)
- Collider Physics
Background:
- Identified hadron production at hadron colliders is crucial for understanding fundamental particle interactions.
- Previous calculations lacked the precision required for detailed studies.
Purpose of the Study:
- To compute the next-to-next-to leading order (NNLO) QCD corrections to identified hadron production.
- To assess the impact of these corrections on observables and theoretical uncertainties.
Main Methods:
- Performed NNLO QCD calculations for identified hadron production.
- Analyzed scale uncertainties and perturbative convergence across various kinematic ranges.
Main Results:
- NNLO corrections were calculated for the first time, significantly impacting observables.
- Higher-order corrections reduced scale uncertainty, showing good perturbative convergence.
- Nonperturbative fragmentation functions (FFs) remain the dominant theoretical uncertainty.
Conclusions:
- NNLO corrections demonstrate the potential for precision studies of hadron production observables.
- Improved fragmentation functions are necessary to fully realize this potential.
- Results enable global fits of fragmentation functions with NNLO precision.
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