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QCD equation of state in the presence of magnetic fields at low density

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arxiv 2312.15118 v2 pith:LADPMRO2 submitted 2023-12-22 hep-lat

S. Borsányi , B. B. Brandt , G. Endrődi , J. Guenther , R. Kara , A. D. M. Valois This is my paper · ORCID
classification hep-lat
keywords fieldsmagneticequationexpansionfinitelatticenon-zeroproblem
verification ladder T0 review T1 audit T2 compute T3 formal
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Peripheral heavy-ion collisions are expected to exhibit magnetic fields with magnitudes comparable to the QCD scale, as well as non-zero baryon densities. Whereas QCD at finite magnetic fields can be simulated directly with standard lattice algorithms, the implementation of real chemical potentials is hindered by the infamous sign problem. Aiming to shed light on the QCD transition and on the equation of state in that regime, we carry out lattice QCD simulations with 2+1+1 flavors of staggered quarks with physical masses at finite magnetic fields and employ a Taylor expansion scheme to circumvent the sign problem. We present the leading-order coefficient of the expansion calculated at non-zero magnetic fields and discuss the impact of the field on the strangeness neutrality condition.

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Cited by 4 Pith papers

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  1. Leading-Order QCD Equation of State in Strong Magnetic Fields at Nonzero Baryon Chemical Potential

    hep-lat 2025-08 conditional novelty 6.0 of 10

    Continuum-estimated leading-order EoS coefficients in magnetized strangeness-neutral QCD at nonzero baryon chemical potential show temperature-band crossings in q1 and P2 and a possible sign change of the trace anomal...

  2. QCD Equation of State with Strong Magnetic Fields and Nonzero Baryon Density

    hep-lat 2025-02 conditional novelty 4.0 of 10

    Lattice QCD continuum estimates of leading-order baryon-density Taylor coefficients of the magnetized QCD equation of state show deviations from hadron gas and approach to a free gas at strong fields.

  3. Dense and magnetized QCD from imaginary chemical potential

    hep-lat 2025-02 conditional novelty 4.0 of 10

    First 2+1+1 flavor lattice QCD results for the leading-order dense QCD equation of state in a magnetic field, along the strangeness-neutral, isospin-asymmetric trajectory, suggesting strong magnetic effects near the c...

  4. Baryon-Electric Charge Correlations and Chemical Potentials as Probes of Magnetized QCD

    hep-lat 2025-02 conditional novelty 3.0 of 10

    Lattice QCD with physical quark masses shows the baryon-electric charge correlation nearly doubles in strong magnetic fields, offering a potential magnetometer for heavy-ion collisions.

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