TY  - JOUR
A1  - Endrődi, Gergely
A1  - Markó, Gergely
T1  - Magnetized baryons and the QCD phase diagram: NJL model meets the lattice
T2  - Journal of High Energy Physics
N2  - We determine the baryon spectrum of 1 + 1 + 1-flavor QCD in the presence of strong background magnetic fields using lattice simulations at physical quark masses for the first time. Our results show a splitting within multiplets according to the electric charge of the baryons and reveal, in particular, a reduction of the nucleon masses for strong magnetic fields. This first-principles input is used to define constituent quark masses and is employed to set the free parameters of the Polyakov loop-extended Nambu-Jona-Lasinio (PNJL) model in a magnetic field-dependent manner. The so constructed model is shown to exhibit inverse magnetic catalysis at high temperatures and a reduction of the transition temperature as the magnetic field grows — in line with non-perturbative lattice results. This is contrary to the naive variant of this model, which gives incorrect results for this fundamental phase diagram. Our findings demonstrate that the magnetic field dependence of the PNJL model can be reconciled with the lattice findings in a systematic way, employing solely zero-temperature first-principles input.
KW  - Chiral Lagrangians
KW  - Lattice QCD
KW  - Phase Diagram of QCD
Y1  - 2019
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/53269
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-532691
SN  - 1029-8479
VL  - 8
IS  - Article number: 36
PB  - Springer
ER  -