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Precise predictions for w+3 jet production at hadron colliders
C F Berger1, Z Bern, L J Dixon
1Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Physical Review Letters
|August 8, 2009
Summary
This study presents the first next-to-leading order QCD calculation for W+3-jet production, achieving excellent agreement with Tevatron data. This advancement in quantum chromodynamics (QCD) provides precise predictions for high-energy particle collisions.
Area of Science:
- High Energy Physics
- Quantum Chromodynamics (QCD)
- Particle Physics
Background:
- W+3-jet production is a key process for testing the Standard Model.
- Precise theoretical predictions are crucial for interpreting experimental data.
Purpose of the Study:
- To perform the first next-to-leading order QCD computation for W+3-jet production.
- To compare theoretical predictions with experimental data from the Tevatron.
Main Methods:
- Utilized on-shell methods for one-loop matrix elements, implemented in the BlackHat numerical program.
- Employed the SHERPA package for real-emission contributions and phase space integration.
- Applied a leading-color (large-N_{c}) approximation for virtual contributions.
Main Results:
- Achieved excellent agreement between the computed W+3-jet production cross-sections and Tevatron data.
- Validated the leading-color approximation for virtual contributions in W+1 and W+2 jet production, showing it to be within three percent accuracy.
Conclusions:
- The next-to-leading order QCD calculation provides a highly accurate description of W+3-jet production.
- This work sets a new standard for theoretical predictions in multi-jet production at hadron colliders.
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