Endroedi, Gergely (2015) Critical point in the QCD phase diagram for extremely strong background magnetic fields. JOURNAL OF HIGH ENERGY PHYSICS (7): 173. ISSN 1029-8479,
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Lattice simulations have demonstrated that a background (electro) magnetic field reduces the chiral/deconfinement transition temperature of quantum chromodynamics for eB < 1 GeV2. On the level of observables, this reduction manifests itself in an enhancement of the Polyakov loop and in a suppression of the light quark condensates (inverse magnetic catalysis) in the transition region. In this paper, we report on lattice simulations of 1+ 1+ 1-flavor QCD at an unprecedentedly high value of the magnetic field eB = 3.25 GeV2. Based on the behavior of various observables, it is shown that even at this extremely strong field, inverse magnetic catalysis prevails and the transition, albeit becoming sharper, remains an analytic crossover. In addition, we develop an algorithm to directly simulate the asymptotically strong magnetic field limit of QCD. We find strong evidence for a first-order deconfinement phase transition in this limiting theory, implying the presence of a critical point in the QCD phase diagram. Based on the available lattice data, we estimate the location of the critical point.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | QUANTUM CHROMODYNAMICS; TRANSITION; CATALYSIS; Lattice QCD; Lattice Gauge Field Theories; Lattice Quantum Field Theory; Phase Diagram of QCD |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 03 Jul 2019 13:14 |
| Last Modified: | 03 Jul 2019 13:14 |
| URI: | https://pred.uni-regensburg.de/id/eprint/5169 |
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