Searches for Dark Matter and Axion-Like Particles at Belle II

Helmholtz Young Investigator Group of Torben Ferber (starting March 2018)

Research Activities

Fig.: Dark Photon production and decay into (invisible) Dark Matter at Belle II (MC simulation).

The Young Investigators Group is situated at DESY. It is part of the existing DESY Belle II group and is linked to the University of Hamburg. We participate in the Belle II experiment being run at the SuperKEKB collider at KEK in Tsukuba, Japan.

We focus on Dark Matter searches. This includes searches for Dark Photons decaying into light Dark Matter and Axion-Like Particles (ALPs). These searches are competitive even with small datasets that can be acquired in several months of data taking at Belle II.

Our activities are closely related to the reconstruction of photons in the electromagnetic calorimeter (ECL) of Belle II. We are leading the development of ECL reconstruction software with a strong focus on Machine Learning including Deep Neural Networks to improve photon detection and reconstruction.


Torben Ferber (picture)

Short biography


"Searches for Dark Matter at Belle II"
(DPG, Wuerzburg, 19.-23.03.2018)

"Probing dark photons and ALPs at B-factories"
(DM@LHC, Heidelberg, 03.-06.04.2018)

"Searches for Dark Matter and Axion-Like Particles at Belle II"
(Particle Physics Seminar, Mainz, 23.04.2018)

"Searches for Dark Matter and Axion-Like Particles at Belle II"
(SFB 676 Colloquium, Hamburg, 25.04.2018)

"Searches for Dark Matter and Axion-Like Particles at Belle II"
(Physikalisches Kolloquium, Karlsruhe, 11.05.2018)

"Flavour Physics (Lectures)"
(DESY Summer Student Lectures, Hamburg, 24.08.2018)


Opportunities for students
We are looking for undergraduate (bachelor, master/diploma) and graduate (Ph.D.) students who would like to become a part of our growing group. If you are interested please contact Dr. Torben Ferber.

Available master theses (in German):
"Softwareentwicklung fuer Belle II"
"Suche nach Dunkler Materie bei Belle II"

Opportunities for postdoctoral fellows
We encourage interested physicists who have completed their Ph.D. within the last 4 years, to apply for DESY fellowships in experimental particle physics. Please contact Dr.
Torben Ferber
for additional information.