Institute for Theoretical Physics (ITP)

Welcome to the Institute for Theoretical Physics (ITP)

Quick-Links: Lectures, Bachelor's and Master's Theses, Completed PhD Theses, Research and Applications.

The Standard Model (SM) of particle physics describes our basic understanding of the building blocks of matter and how they interact with each other. It is an extremely successful theory that is able to describe particle physics phenomena from the scale of electroweak symmetry breaking all the way up to the Planck scale. With the discovery of the Higgs boson in 2012 - 48 years after its first postulation - the SM has been made structurally complete. Numerous high-precision experiments have tested the SM at the quantum level. Still, there are problems that cannot be explained within the SM, such as the nature of Dark Matter or the generation of the baryon-antibaryon asymmetry e.g. This situation calls for new physics extensions beyond the SM, entailing new particles and interactions implying new signatures to be studied at the Large Hadron Collider (LHC) at CERN or future e+e- and hadron colliders.

The research at the Institute of Theoretical Physics (ITP) is centered around theoretical particle physics. Our aim is to improve our understanding of nature by making high-precision predictions for observables to be tested at present and future high-energy colliders, both for the SM and new physics extensions beyond the SM. This effort is supported by the development of Monte Carlo algorithms to understand the production at the hadronic level. The research at ITP is complemented by analyses of fundamental aspects of quantum field theory, in particular gauge field theory, and by investigations of the structure of spacetime and the cosmological constant problem.

Members of the ITP also work very closely with the research groups in theoretical (astro-)particle physics at the Institute for Astroparticle Physics (IAP).

Bachelor's & Master's Theses at the ITP

If you are interested in doing your Bachelor's or Master's thesis on the topic of theoretical particle physics at the ITP, feel free to drop by on the 12th floor and talk to us or send us an e-mail. To get an idea of what we are working on, you can check out the research page of each group, or you can have a look at the completed Bachelor's and Master's theses at our institute.

News & Events

24. – 27.11.2022: 26. Deutsche Physikerinnentagung 2022

The 26th German Conference of Women in Physics (Deutsche Physikerinnentagung) will take place from 24 to 27 November 2022 and is hosted by the KIT. Taking place annually since 1997, it is supported by the German Physical Society (Deutsche Physikalische Gesellschaft DPG) and by its Working Group on Equal Opportunities (AKC). The conference offers female physicists of different areas and at different career levels – from student to professor as well as physicists in industry – the possibility for networking and professional exchange. Registration (DL: 01.11.2022) and abstract submission (DL: 09.09.2022) are open!

More informations as well as registration links can be found on

28.07.2022: ITP Seminar (posted on: 26.07.2022)

In the upcoming ITP seminar (Thursday, 28.07., 14h00), Xuan Chen will talk about “Uncertainties and Opportunities in W boson Mass Determination”. The seminar will take place in room 12-01 will in addition be streamed via Zoom.


28.07.2022: Particle Physics Colloquium (posted on: 25.07.2022)

In the upcoming particle physics colloquium (Thursday, 28.07., 15h45), we will have Prof. Abdesslam Arhrib (Abdelmalek Essaadi University) giving a talk on the “Search for Light Charged Higgs at the LHC”. The colloquium will take place in Kleiner Hörsaal A, and it will also be transmitted via Zoom.


21.07.2022: ITP Seminar (posted on: 19.07.2022)

In the upcoming ITP seminar (Thursday, 21.07., 14h00), Marijn van Geest and Philipp Rendler will each give a talk about their Bachelor's thesis projects. The titles of the talks are “Anomalous couplings in ttH production” and “Tests of CP-violation in the Complex Two-Higgs-Doublet-Model”, respectively. The seminar will take place in room 12-01 and will in addition be streamed via Zoom.


14.07.2022: New ITP Guest Scientist (posted on: 14.07.2022)

We warmly welcome Subhojit Roy who is a PhD student at the Harish-Chandra Research Institute in India. He is a guest of the Mühlleitner group and will stay at our institute for two weeks. Subhojit sits in room 12-07. We wish him a pleasant and productive stay!


21.07.2022: Particle Physics Colloquium (posted on: 13.07.2022)

In the upcoming particle physics colloquium (Thursday, 21.07., 15h45), we will have Prof. Rui Santos (Universidade de Lisboa) giving a talk on “How can an extended scalar sector improve your life?”. The colloquium will take place in Kleiner Hörsaal A, and it will also be transmitted via Zoom.


Research Groups at the Institute for Theoretical Physics

The Institute for Theoretical Physics (ITP) consists of five research groups. Their activities are described below.

Stefan Gieseke

Research interests: The simulation of exclusive final states at colliders with Monte Carlo Methods. Our research aims at the best possible description of all possible final states, first and foremost at the Large Hadron Collider but possibly also for collisions of electrons and positrons or hadrons when they are hit by cosmic particles at very high energies. We improve the standard model description, mostly of the strong interaction (Quantum Chromodynamics, QCD) with systematic perturbative methods or with models for strong hadronic interactions.

Detailed information

Gudrun Heinrich

Research interests: Exploring the Higgs sector: finding hints about New Physics through precision measurements requires precision calculations, which we do both within and beyond the Standard Model. We combine Effective Field Theory parametrisations of BSM effects with higher order corrections and perform studies of anomalous couplings in the Yukawa and gauge boson sectors. Scattering amplitudes: we aim to largely automate the calculation of scattering amplitudes beyond one loop. An important aspect here is the numerical evaluation of multi-loop Feynman diagrams, as well as a better understanding of their mathematical structure.

Detailed information

Frans R. Klinkhamer

Research interests: Fundamental aspects of quantum field theory, in particular gauge field theory. Structure of spacetime, both at very large and very small length scales. Cosmological constant problem.

Detailed information

Milada M. Mühlleitner

Research interests: Collider physics, phenomenological investigations of models beyond the Standard Model, including precision calculations to Higgs observables, namely production (single and double Higgs) and decay processes; cornering the validity of the models considering theoretical and experimental constraints; baryogenesis and Dark Matter.

Detailed information

Dieter Zeppenfeld

Research interests: Collider physics; QCD corrections; effective field theories; models of electroweak symmetry breaking; phenomenological investigations of mixed QCD/electroweak processes in hadronic collisions, e.g. vector boson scattering, weak boson pair production, etc.

Detailed information

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