Humboldt-Universität zu Berlin - Faculty of Mathematics and Natural Sciences - Experimental High Energy Physics (EHEP)

Experimental High Energy Physics (EHEP)

The Experimental High Energy Physics Group at Humboldt University of Berlin is a newly founded research group that is led by Cigdem Issever.


The group is part of the international ATLAS collaboration at the Large Hadron Collider (LHC) at CERN.

The primary purpose of the experiments at the Large Hadron Collider at CERN is the discovery of physics beyond our current understanding of nature and the measurements of the properties of the Standard Model particles, including the newly discovered Higgs boson.

One of the most prominent signatures at the LHC to do these studies are final states with hadrons which produce complex particle showers initiated by them and by interactions with the detector material. These particle showers are reconstructed in the detectors as so called “jets”.




Origin of Mass - Higgs Pair Production at the LHC

The group will be working on searches for new physics in di-Higgs final states where at least one of the Higgs bosons decays into a b-quark pair.  It will actively work on the calibration and performance studies of jets and b-quark jets in the ATLAS detector. We will work on developing b-quark triggers with very low trigger thresholds and exploit novel algorithms to reconstruct final state particles and perform large scale data analysis. 

In addition to searching for new physics beyond the Standard Model, the groups' long term goal is to measure the Higgs self-coupling at the LHC using di-Higgs final states. The Higgs self-coupling is an important parameter and its value influences the shape of the Higgs potential that is important for the mass generation in nature. This research area of the EHEP group is supported by an ERC grant from the Horizon 2020 program.

Generic Detector R&D

The group will also work in generic detector R&D for particle physics and non-particle physics application, including medical applications. This part of the program will ramp up over time.



Prof. Dr. Cigdem Issever