Triple Differential Dijet Cross Section at the LHC.

Area of Science:

• High-energy particle physics
• Quantum Chromodynamics (QCD)
• Collider physics

Background:

• Dijet production cross sections provide insights into parton momentum distributions within hadrons.
• Previous calculations lacked second-order perturbative QCD corrections for triple-differential dijet production.

Purpose of the Study:

• To compute the second-order perturbative QCD corrections to the triple-differential dijet production cross section.
• To enable precision studies of parton densities using Large Hadron Collider (LHC) dijet data.
• To perform a detailed comparison with experimental CMS 8 TeV data.

Main Methods:

• Calculation of second-order perturbative QCD corrections at leading color in all partonic channels.
• Measurement of the triple-differential dijet production cross section as a function of average transverse momentum (pT,avg), rapidity separation (y*), and boost (yb).
• Comparison of theoretical predictions with experimental data from the CMS detector at 8 TeV.

Main Results:

• The first computation of second-order perturbative QCD corrections for triple-differential dijet production is presented.
• The shape of the differential cross section is shown to probe parton densities across different kinematic ranges.
• Agreement between theoretical calculations and CMS 8 TeV data demonstrates the validity of the approach.

Conclusions:

• The inclusion of second-order corrections significantly enhances the precision of dijet production studies.
• This work provides a crucial tool for detailed investigations of parton distribution functions (PDFs) at the LHC.
• The results pave the way for more refined analyses of high-energy collision data.