Quantum Chromodynamics

Our group is actively involved in providing predictions for essential collider observables with very high precision. For hadron colliders such as the LHC this typically requires to compute radiative corrections in perturbative Quantum Chromodynamics (QCD). Complementary research performed in our group is based on lattice QCD, which provides a handle to phenomena in QCD which are not accessible within perturbation theory.

Transverse momentum (or QT) resummation is a powerful method to predict differential distributions of elementary particles in quantum chromodynamics. Its main features and differences from Monte-Carlo showering methods are discussed in the brief overview of resummation theory on the transverse momentum resummation portal.

Fixed order calculations at next-to-next-to-leading order (NNLO) are crucial for the interpretation of many measurements at the LHC, and in particular to identify signals of new physics. At MSU, we focus on the calculation of multi-loop scattering amplitudes and Feynman integrals. This includes the development of novel mathematical methods and computational tools required for that task. Please see our multiloop pages for more details.

Members of our group also belong to The Project on Collaborative Theoretical and Experimental Studies of Quantum Chromodynamics. CTEQ is a multi-institutional collaboration devoted to a broad program of research projects and cooperative enterprises in high energy physics centered on Quantum Chromodynamics and its implications in all areas of the Standard Model and beyond.