Bali, G. S. and Bruckmann, F. and Endrodi, G. and Fodor, Z. and Katz, S. D. and Krieg, S. and Schaefer, A. and Szabo, K. K. (2012) The QCD phase diagram for external magnetic fields. JOURNAL OF HIGH ENERGY PHYSICS (2): 044. ISSN 1029-8479,
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The effect of an external (electro) magnetic field on the finite temperature transition of QCD is studied. We generate configurations at various values of the quantized magnetic flux with N-f = 2 + 1 flavors of stout smeared staggered quarks, with physical masses. Thermodynamic observables including the chiral condensate and susceptibility, and the strange quark number susceptibility are measured as functions of the field strength. We perform the renormalization of the studied observables and extrapolate the results to the continuum limit using N-t = 6, 8 and 10 lattices. We also check for finite volume effects using various lattice volumes. We find from all of our observables that the transition temperature T c significantly decreases with increasing magnetic field. This is in conflict with various model calculations that predict an increasing T-c(B). From a finite volume scaling analysis we find that the analytic crossover that is present at B = 0 persists up to our largest magnetic fields e B approximate to 1 GeV2, and that the transition strength increases mildly up to this e B approximate to 1 GeV2.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SYMMETRY-BREAKING; PARITY VIOLATION; NEVEU MODEL; TRANSITION; PARTICLE; TEMPERATURE; CATALYSIS; DEPENDENCE; OPERATOR; MASSES; Lattice QCD; Lattice Quantum Field Theory |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Gunnar Bali |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 19 May 2020 09:16 |
| Last Modified: | 19 May 2020 09:16 |
| URI: | https://pred.uni-regensburg.de/id/eprint/19267 |
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