Speaker: Prof. Dr. Klaus Reygers (Physikalisches Institut, Heidelberg)
Title of Talk: Low-energy photons in high-energy collisions

Abstract: Photons provide crucial information about ultra-relativistic proton-proton and nucleus-nucleus collisions. At CERN’s Large Hadron Collider (LHC), the ALICE 3 experiment planned for LHC Run 5 and beyond focuses on electromagnetic radiation at low energies. Work within the ISOQUANT collaborative research center (CRC 1225) was done to help shape the physics programme of ALICE 3. In this talk we will focus on two aspects: (1) experimental tests of Low’s theorem the resolve the long-standing soft-photon puzzle and (2) the extraction of the electrical conductivity of the quark-gluon plasma with low-energy real and virtual photons.


Venue (HYBRID-EVENT): Goldene Box, Physikalisches Institut, INF 226, 69120 Heidelberg AND all talks will also be streamed via the permanent Zoom-link:

Meeting ID: 946 0240 1603
Passcode: 386993

13:00 – 13:45  talk
13:45-14:00   questions & discussion
14:00 pizza


The main idea of the CRC 1225 Lunch Seminars is to bring together all scientists involved in our collaboration on a regular basis to allow exchange and discussion even outside one’s own research topics. We therefore invite all PIs and working group members of the CRC 1225 ISOQUANT to participate in the Lunch Seminars and to use this opportunity for getting to know each other, fruitful discussions and valuable exchange.

The seminar will take place in presence in accordance with the current COVID-19 regulations for on-site events (Please wear a FFP2 mask or surgical mask if the minimum distance of 1.5m can not be guaranteed).