Deconfinement and Chiral Symmetry Restoration in a Strong Magnetic Background

Dec, 2010
12 pages
Published in:
  • Phys.Rev.D 83 (2011) 034016
e-Print:
Report number:
  • YITP-10-96

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Abstract: (arXiv)
We perform a model study of deconfinement and chiral symmetry restoration in a strong magnetic background. We use a Nambu-Jona Lasinio model with the Polyakov loop, taking into account a possible dependence of the coupling on the Polyakov loop expectation value, as suggested by the recent literature. Our main result is that, within this model, the deconfinement and chiral crossovers of QCD in strong magnetic field are entangled even at the largest value of eBeB considered here, namely eB=30mπ2eB=30 m_\pi^2 (that is, B6×1015B \approx 6\times 10^{15} Tesla). The amount of split that we measure is, at this value of eBeB, of the order of 2%. We also study briefly the role of the 8-quark term on the entanglement of the two crossovers. We then compare the phase diagram of this model with previous results, as well as with available Lattice data.
Note:
  • 12 pages, 6 figures, RevTeX 4-1 style. Some reference added. Some typos corrected. To appear on Physical Review D
  • 12.38.Aw
  • 12.38.Mh
  • Hot quark matter
  • Effective models of QCD
  • Deconfinement and chiral symmetry restoration in magnetic fields
  • symmetry: chiral
  • magnetic field: background field: high
  • critical phenomena: deconfinement
  • Polyakov loop
  • vertex