TY  - JOUR
A1  - Brandt, Bastian Benjamin
A1  - Cuteri, Francesca
A1  - Endrődi, Gergely
A1  - Hernández Hernández, José Javier
A1  - Markó, Gergely
T1  - QCD topology with electromagnetic fields and the axion-photon coupling
N2  - The introduction of non-orthogonal electric and magnetic fields in the QCD vacuum enhances the weight of topological sectors with a nonzero topological charge. For weak fields, there is a linear response for the expectation value of the topological charge. We study this linear response and relate it to the QCD correction to the axion-photon coupling. We also analyse the magnetic field dependence of the topological susceptibility for a range of temperatures around Tc. In this work we use lattice simulations with improved staggered quarks at physical masses, including background magnetic and (imaginary) electric fields.
Y1  - 2022
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/71676
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-716765
ER  -