Institute for Theoretical Physics (ITP)

Research Group of Prof. Dr. Gudrun Heinrich

Dr. Xuan Chen, Jannis Lang, Dr. Vitaly Magerya, Emilio Villa, Dr. Ramon Winterhalder (HEiKA)

General research field

Precision calculations and their applications to Collider Physics.

List of publications: iNSPIRE.

Topics

Higgs physics

  • shedding light on the Higgs potential through Higgs boson pair production
  • study of anomalous couplings in the Higgs sector within Effective Field Theory
  • higher order corrections in the Higgs sector
  • Monte Carlo programs for precision phenomenology


Heavy quarks and the Higgs boson

  • higher order perturbative calculations
  • hints of physics beyond the Standard Model in the top-Higgs sector


Development of novel methods for precision calculations

  • automation of two-loop amplitude calculations
  • calculation of multi-loop Feynman diagrams
  • mathematical aspects of Feynman diagrams

Tools

pySecDec:

A program to factorize the poles from dimensionally regulated
parameter integrals and to evaluate them numerically. It can be used for
multi-loop integrals as well as other multi-dimensional parameter integrals.

  • current pySecDec collaboration:
    Gudrun Heinrich (KIT), Stephen Jones (IPPP Durham), Matthias Kerner (Zurich University) , Vitaly Magerya (KIT), Andres Poldaru (LMU Munich), Johannes Schlenk (PSI Villigen), Emilio Villa (KIT)
  • former members:
    Sophia Borowka, Jonathon Carter, Stephan Jahn, Tom Zirke


ggHH

NLO corrections to Higgs boson pair production with full top quark mass dependence, including anomalous couplings.
http://powhegbox.mib.infn.it

GoSam

A program to generate and evaluate multi-leg one-loop amplitudes, within and beyond the Standard Model.
http://gosam.hepforge.org/,
https://github.com/gudrunhe/gosam

golem95

One-loop library of scalar and tensor integrals (written in Fortran95).
http://golem.hepforge.org/

eerad3

Computes the QCD contributions to event shapes and jet rates in electron-positron annihilation at parton level to order $\alpha_s^3$. For three-jet production and related observables, this corresponds to NNLO corrections.
http://eerad3.hepforge.org

Information on Bachelor and Master Theses

If you are interested in a Bachelor, Master or PhD thesis in the field of precision calculations and particle phenomenology, please contact Gudrun Heinrich via email. The thesis may involve work with programs based mainly on python and C++ (for example the program pySecDec) or python and fortran90 (for example the program GoSam). However, subjects where the focus is more on analytic calculations are also possible. The students will be part of an active and lively research group, comprising also international collaborators.

Examples for Bachelor thesis topics

  • Untersuchung der Effekte anomaler Kopplungen im Higgs-Sektor
  • numerische Untersuchung von Loop-Integralen basierend auf dem Programm pySecDec
  • Verbesserung des user-interface des Programms pySecDec

Examples for Master thesis topics

  • Investigation of effects from so far unknown particles/interactions in Higgs boson pair production
  • Higgs+Jet production as a window to New Physics
  • Study of multi-loop-integrals with top-quarks and Higgs bosons based on the program pySecDec
  • Anomalous couplings of top quarks
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