The Roberge-Weiss endpoint in $(2+1)$-flavor QCD with background magnetic fields

Abstract

In this work we discuss our preliminary results regarding the so-called Roberge-Weiss (RW) transition, which is found for imaginary values of the baryon chemical potential, in the presence of a background magnetic field. We perform lattice QCD simulations on $N_t=6,8$ lattices with $2+1$ flavors of stout-staggered fermions at physical quark masses and the tree-level Symanzik improved gauge action. We determine the location the RW endpoint at finite magnetic fields and we study the order of the transition.

Comments: 11 pages, 8 figures, Proceedings of the 41st International Symposium on Lattice Field Theory, 28 July - 3 August, 2024, Liverpool, UK