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Thermal pions in a magnetic background

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arxiv 1202.2051 v3 pith:3WKUXXLI submitted 2012-02-09 hep-ph

classification hep-ph
keywords magneticfieldcalculationschiralconstantleadingpionspresence
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

We use chiral perturbation theory for SU(2) to compute the leading corrections to the thermal mass of the pions and the pion decay constant in the presence of the magnetic field in a low-temperature expansion. The magnetic field gives rise to a splitting between $M_{\pi^0}$ and $M_{\pi^{\pm}}$ as well as $F_{\pi^0}$ and $F_{\pi^{\pm}}$. We also calculate the free energy and the quark condensate to next-to- leading order. The results suggest that the critical temperature $T_c$ for the chiral transition is larger in the presence of a constant magnetic field, in agreement with most model calculations but in disagreement with recent lattice calculations.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Hadronic exceptional points

    hep-ph 2026-06 unverdicted novelty 7.0 of 10

    Imaginary magnetic fields induce exceptional points in neutral meson mass spectra computed via hadronic effective Lagrangian and constituent quark models, separating real and complex eigenvalue regimes.

  2. Photon emission from weakly magnetized neutral pions

    hep-ph 2025-12 conditional novelty 6.0 of 10

    In a proton-loop hadronic model, a weak magnetic field suppresses π0→γγ at O(|eB|²/m_P⁴), with a small anisotropy strongest for pion momenta perpendicular to the field.

  3. Neutral pion mass in the linear sigma model coupled to quarks at arbitrary magnetic field

    hep-ph 2019-08 conditional novelty 6.0 of 10

    In the linear sigma model with quarks, the neutral pion mass first falls and then rises as the external magnetic field grows, a nonmonotonic curve that the earlier weak-field calculation did not show.

  4. Strongly interacting matter in extreme magnetic fields

    nucl-th 2024-12 conditional novelty 2.0 of 10

    A state-of-the-art review of magnetic field effects in QCD and QED matter, covering meson properties, anomalous transport, effective models, the QCD phase diagram, and neutron stars.

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