Topology in hot QCD (A05)

• Subject Area: Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields
• Term: since 2017
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 315477589

Topology in hot QCD will extend the study of the topological susceptibility of QCD to high temperatures within the full (unquenched) theory, reaching the whole temperature range which is important in the early-Universe cosmology of the axion (up to 1100 MeV). This will require precision scale setting and the application of reweighting techniques in a theory with light (physical) fermions. We will then extend the study of topology to exotic environments: intense magnetic fields and isospin chemical potentials, including the case of large isospin densities where the susceptibility is also expected to be very small. Finally, we will explore the interaction between QCD topology and electromagnetic topological density which arises due to dynamical fermions.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 211: Strong-Interaction Matter under Extreme Conditions
• Applicant Institution: Technische Universität Darmstadt
• Project Heads: Professor Dr. Dietrich Bödeker, since 7/2021; Professor Dr. Gergely Endrödi, since 7/2021; Professor Dr. Frithjof Karsch, from 9/2018 until 6/2021; Professor Dr. Edwin Laermann, until 8/2018 (†); Professor Dr. Guy Moore