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Precise predictions for W+4-jet production at the large hadron collider
C F Berger1, Z Bern, L J Dixon
1Center for Theoretical Physics, MIT, Cambridge, Massachusetts 02139, USA.
Physical Review Letters
|March 17, 2011
Summary
We calculated the next-to-leading order Quantum Chromodynamics (QCD) results for W+4-jet production at hadron colliders. This crucial background process is vital for new physics searches at the Large Hadron Collider (LHC).
Area of Science:
- High Energy Physics
- Quantum Chromodynamics (QCD)
- Particle Physics
Background:
- W+4-jet production is a significant background process at the Large Hadron Collider (LHC).
- Accurate theoretical predictions are essential for interpreting experimental results and searching for new physics.
- Previous calculations were limited in precision for such complex final states.
Purpose of the Study:
- To compute the next-to-leading order (NLO) QCD corrections for W+4-jet production.
- To provide precise theoretical predictions for this process at the LHC.
- To establish a foundation for background estimation in new physics searches.
Main Methods:
- Utilized the BLACKHAT and SHERPA computational libraries.
- Employed a leading-color approximation, validated for accuracy in similar processes.
- Performed calculations for a center-of-mass energy of √s = 7 TeV.
Main Results:
- Presented the first NLO QCD calculation for a five-final-state-object process at hadron colliders.
- Calculated total cross sections and differential distributions for jet transverse momenta.
- The leading-color approximation was found to be accurate to within 3% for W production with fewer jets.
Conclusions:
- The NLO QCD results for W+4-jet production offer enhanced precision for LHC physics.
- This calculation serves as a critical background for searches for new physics at the energy frontier.
- The methodology and results pave the way for more complex theoretical predictions in particle physics.
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