Organisation: Johannes Gutenberg University > Faculty 08 > Physics > Physics Research > Institutes & research facilities > Institute of Physics > Theroetical High Energy Physics (THEP) > AG Stefan Weinzierl
The research in the group focuses broadly on precision calculations in particle physics, mathematical physics, computer algebra, …
Examples of predictions for specific processes:
- The forward-backward asymmetry in electron-positron annihilation
- 4-jet observables in electron-positron annihilation
- Single top production at hadron colliders
- Top pair production in association with a jet at hadron colliders
Development of tools and techniques:
- NNLO calculations
- Automatization of NLO calculations
- Parton showers
Scattering amplitudes reveal interesting mathematical structures:
- Multiple polylogarithms
- Twistor space
The calculation of loop amplitudes in particle physics is nowadays done with computer algebra and puts special requirements on computer algebra systems: On the one hand large amounts of data need to be handled by the system, on the other hand it has to be possible to program sophisticated algorithms in the language of the computer algebra system. To meet these goals, the dedicated computer algebra system “GiNaC” has been developed at Mainz University. The user community of this program extends now worldwide and far beyond the particle physics community:
- GiNaC
- gTybalt – A graphical font-end to GiNaC
- The nestedsums library – Symbolic expansion of transcendental functions.
Within this DFG-project we compute non-perturbative quantities, like correlation functions on a lattice, through methods originally developped within the context of Feynman integrals.
Another DFG-project allows us to study multi-loop Feynman integrals through the lens of twisted de Rham cohomology groups and Hodge theory.
The aim is to develop novel and powerful computational techniques that can be used to derive and solve systems of differential equations satisfied by Feynman integrals that go beyond the current state-of-the-art.
A full list of publications of Stefan Weinzierl can be found at Inspire:
Theoretical Physics 6a, Relativistic Quantum Field Theory
Tuesdays 12:15-13:45 and Wednesdays 10:15-11:45, Galilei room
Work group seminar: Calculation of Feynman Integrals
Work group seminar: Precision Calculations in High Energy Physics
Seminar on Current Topics of Theoretical Elementary Particle Physics (“Theoriepalaver“)
For career or research opportunities please contact Stefan Weinzierl directly by e-mail.