QCD ?-vacuum in a uniform magnetic field
نویسندگان
چکیده
We study the ?-vacuum of QCD using two-flavor chiral perturbation theory (?PT) in presence a uniform, background magnetic field calculating field-dependent free energy density, topological susceptibility and fourth cumulant at one-loop order. find that is enhanced by while diminished weak fields larger when ?=0. However, vacuum with ??0, can be either monotonically or relative to their values. The also exhibits monotonic enhancement suppression except for regions ? near 0 2?, where it both enhanced. Finally, density all its shift being identical up down quark condensates ?-vacuum.
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2022
ISSN: ['1873-1562', '0550-3213']
DOI: https://doi.org/10.1016/j.nuclphysb.2021.115627