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Background magnetic field stabilizes QCD string against breaking
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Background magnetic field stabilizes QCD string against breaking
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The confinement of quarks in hadrons occurs due to formation of QCD string. At large separation between the quarks the QCD string breaks into pieces due to light quark-antiquark pair creation. We argue that there exist a critical background magnetic field e B ~ 16 m_\pi^2, above which the string breaking is impossible in the transverse directions with respect to the axis of the magnetic field. Thus, at strong enough magnetic field a new, asymmetrically confining phase may form. The effect - which can potentially be tested at LHC/ALICE experiment - leads to abundance of u-quark rich hadrons and to excess of radially excited mesons in the noncentral heavy-ion collisions compared to the central ones.
Forward citations
Cited by 1 Pith paper
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Quarkonium spectra with magnetically induced anisotropic confinement
Radially excited charmonium masses fall sharply with magnetic field strength under lattice-inspired anisotropic confinement, while the ground state barely moves.
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