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Complete Next-to-Leading Order QCD Corrections to ZZ Production in Gluon Fusion
Bakul Agarwal1,2, Stephen Jones3, Matthias Kerner1
1Karlsruhe Institute of Technology (KIT), Institute for Theoretical Physics, D-76131 Karlsruhe, Germany.
Physical Review Letters
|February 10, 2025
Summary
We calculated quantum chromodynamics corrections for gluon-induced ZZ production, including top-quark mass effects. These corrections are significant for high-energy collisions at the Large Hadron Collider.
Area of Science:
- High Energy Physics
- Quantum Chromodynamics
- Particle Physics
Background:
- Loop-induced gluon-fusion to ZZ production is a key process for precision studies.
- Top-quark mass effects are crucial for accurate theoretical predictions.
Purpose of the Study:
- To compute the complete next-to-leading order (NLO) QCD corrections to loop-induced gg→ZZ production.
- To investigate the impact of full top-quark mass effects on this process.
Main Methods:
- Combining analytic results for massless and Higgs-mediated contributions with numerically computed amplitudes including top-quark mass.
- Analyzing the influence of different subtraction schemes on virtual contributions.
Main Results:
- NLO corrections are substantial for direct production via a massive top-quark loop.
- Massive and Higgs-mediated contributions increase at high diboson invariant mass but interfere destructively.
- NLO corrections to the gluon channel contribute significantly to the pp→ZZ+X cross section at N3LO.
Conclusions:
- Accurate evaluation of virtual contributions is essential for precise phenomenological predictions.
- Top-quark mass effects play a critical role in gg→ZZ production at high energies.
- These NLO corrections are vital for future precision measurements at the LHC.
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