Confining and chiral properties of QCD in extremely strong magnetic fields

Abstract

We investigate, by numerical lattice simulations, the static quark-antiquark potential, the flux tube properties and the chiral condensate for $N_f=2+1$ QCD with physical quark masses in the presence of strong magnetic fields, going up to $eB=9$ GeV${}^2$, with continuum extrapolated results. The string tension for quark-antiquark separations longitudinal to the magnetic field is suppressed by one order of magnitude at the largest explored magnetic field with respect to its value at zero magnetic background, but is still non-vanishing; in the transverse direction, instead, the string tension is enhanced but seems to reach a saturation at around 50 % of its value at $B=0$. The flux tube shows a consistent suppression/enhancement of the overall amplitude, with mild modifications of its profile. Finally, we observe magnetic catalysis in the whole range of explored fields with a behavior compatible with a lowest Landau level approximation, in particular with a linear dependence of the chiral condensate on $B$ which is in agreement, within errors, with that already observed for $eB\sim 1$ GeV${}^2$.

12 pages, 16 figures, 2 tables

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• Phase diagram of QCD in a magnetic background
• Strong-Field Physics in QED and QCD: From Fundamentals to Applications
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• Baryon electric charge correlation as a magnetometer of QCD
• Anisotropic and frame dependent chaos of suspended strings from a dynamical holographic QCD model with magnetic field
• Holographic confining/deconfining gauge theories and entanglement measures with a magnetic field
• Hot perturbative QCD in a very strong magnetic background
• QCD Thermodynamics and Neutral Pion in a Uniform Magnetic Field: Finite Volume Effects
• Holographic Non-local Rotating Observables and their Renormalization
• Interplay of magnetic field and chemical potential induced anisotropy and frame dependent chaos of a $Q\bar{Q}$ pair in holographic QCD
• Photons production in heavy-ion collisions as a signal of deconfinement phase
• Structure of heavy quarkonia in a strong magnetic field
• Quark condensate in QCD at nonzero magnetic field and temperature
• Chiral Properties of $(2+1)$-Flavor QCD in Magnetic Fields at Zero Temperature
• Probing Quarkonium Diffusion in a Magnetized Quark-Gluon Plasma
• Quarkonium spectra with magnetically induced anisotropic confinement