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High-Energy Limit of QCD beyond the Sudakov Approximation
Tao Liu1, Alexander A Penin1,2
1Department of Physics, University of Alberta, Edmonton, Alberta T6G 2J1, Canada.
Physical Review Letters
|January 13, 2018
Summary
This study investigates mass-suppressed radiative corrections in high-energy quantum chromodynamics. These corrections, driven by soft quark exchange, reveal universal behavior in processes like Higgs boson production.
Area of Science:
- High-energy particle physics
- Perturbative quantum chromodynamics (pQCD)
- Scattering amplitudes
Background:
- Sudakov limit describes high-energy scattering amplitudes.
- Quark mass effects can lead to power-suppressed corrections.
- Understanding these corrections is crucial for precise theoretical predictions.
Purpose of the Study:
- Investigate leading power-suppressed contributions in the Sudakov limit.
- Analyze the role of soft quark exchange in radiative corrections.
- Determine the asymptotic behavior of scattering amplitudes with mass effects.
Main Methods:
- Factorization of scattering amplitudes.
- All-order resummation of double-logarithmic radiative corrections.
- Analysis of soft quark exchange and eikonal color charge nonconservation.
Main Results:
- Proved factorization for mass-suppressed Sudakov limit.
- Performed all-order resummation of double-logarithmic corrections.
- Identified soft quark exchange as the source of mass-suppressed corrections.
- Observed universal behavior in Higgs boson production and quark form factors.
- Found nontrivial relations between different amplitudes and gauge theories.
Conclusions:
- Mass-suppressed corrections depend on color flow and eikonal charge nonconservation.
- Explicit results for Higgs production and quark form factors demonstrate universality.
- The findings establish new relations in perturbative quantum chromodynamics and gauge theories.
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