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Kinematic power corrections in off-forward hard reactions.
1Institut für Theoretische Physik, Universität Regensburg, Germany.
Physical Review Letters
|December 21, 2011
Summary
We present a new method for calculating kinematic corrections in hard scattering processes. This approach accurately accounts for momentum transfer, enhancing studies like deeply virtual Compton scattering.
Area of Science:
- High-energy physics
- Quantum chromodynamics
- Particle physics
Background:
- Hard scattering processes involve momentum transfer between hadrons.
- Kinematic corrections are crucial for precise theoretical predictions.
- Previous methods lacked comprehensive treatment of these corrections.
Purpose of the Study:
- To develop a general method for calculating kinematic corrections.
- To include corrections up to twist-four accuracy.
- To provide a tool applicable to various hard processes.
Main Methods:
- Derivation of the time-ordered product of two electromagnetic currents.
- Systematic inclusion of kinematic corrections proportional to t/Q(2) and m(2)/Q(2).
- Calculation performed to twist-four accuracy.
Main Results:
- A complete expression for the time-ordered product is derived.
- All kinematic corrections to twist-four accuracy are included.
- The method is general and applicable to various hard processes.
Conclusions:
- The developed approach provides a robust framework for calculating kinematic corrections.
- The results are directly applicable to processes such as deeply virtual Compton scattering.
- This work advances the precision of theoretical predictions in high-energy physics.
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