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Second-order QCD corrections to event shape distributions in deep inelastic scattering
T Gehrmann1, A Huss2, J Mo1
11Physik-Institut, Universität Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland.
The European Physical Journal. C, Particles and Fields
|January 7, 2020
Summary
We calculated advanced Quantum Chromodynamics (QCD) corrections for deep inelastic scattering. These corrections improve predictions and reduce uncertainties, matching experimental data well.
Area of Science:
- High Energy Physics
- Quantum Chromodynamics (QCD)
- Particle Physics
Background:
- Deep inelastic lepton-nucleon scattering experiments probe the structure of hadrons.
- Event shape distributions are crucial observables for testing QCD predictions.
- Previous calculations lacked sufficient precision for detailed comparisons.
Purpose of the Study:
- To compute the next-to-next-to-leading order (NNLO) QCD corrections to event shape distributions and their mean values.
- To assess the impact of these corrections on theoretical uncertainties.
- To compare predictions with experimental data from H1 and ZEUS.
Main Methods:
- Calculation of NNLO QCD corrections using theoretical techniques.
- Application of a dispersive model for non-perturbative power corrections.
- Comparison of theoretical predictions with H1 and ZEUS experimental data.
Main Results:
- NNLO QCD corrections were computed for various event shape variables.
- The magnitude and shape of corrections varied significantly across different variables.
- Corrections were found to reduce renormalization and factorization scale uncertainties.
- Improved agreement between theory and experimental data was achieved.
Conclusions:
- The NNLO QCD corrections provide a more accurate description of event shape distributions.
- The inclusion of these corrections enhances the predictive power of QCD in deep inelastic scattering.
- The study validates theoretical calculations against high-precision experimental measurements.
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