The masses of the strange mesons (K, K∗ and ϕ) are investigated in the presence of strong magnetic fields. The changes in the masses of these mesons arise from the mixing of the pseudoscalar and vector mesons in the presence of a magnetic field. For the charged mesons, these mass modifications are in addition to the contributions from the lowest Landau energy levels to their masses. The decay widths, ϕ → KK̄ and K∗→ Kπ, in the presence of the magnetic field are studied using a field theoretic model of composite hadrons with constituent quarks/antiquarks. The model uses the free Dirac Hamiltonian in terms of the constituent quark fields as the light quark–antiquark pair creation term and explicit constructions for the meson states in terms of the constituent quarks and antiquarks to study the decay processes. The pseudoscalar–vector (PV) meson mixing leads to a drop (rise) in the mass of the pseudoscalar (longitudinal component of the vector) meson. It is observed that the mass modifications for the hidden strange mesons, arising from ϕ − η′ mixing, are quite prominent, whereas the neutral open strange mesons have only marginal changes in their masses due to mixing. The mass modifications of the charged open strange mesons are due to interplay between the Landau-level contributions and the PV mixing, and, the latter effect is observed to dominate at large values of the magnetic field. The vector meson decay widths (ϕ → KK̄ and K∗→ Kπ) involving the charged mesons are observed to be quite different from the widths involving neutral mesons, due to the additional contribution for the charged mesons from the Landau levels.

中文翻译：

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强磁场中的奇异介子

奇异介子的质量（ķ,ķ*和φ) 在存在强磁场的情况下进行研究。这些介子质量的变化源于在磁场存在下赝标量和矢量介子的混合。对于带电介子，这些质量修改是除了最低朗道能级对其质量的贡献之外的。衰减宽度，φ → ķķ̄和ķ*→ ķπ，在存在磁场的情况下，使用具有组成夸克/反夸克的复合强子的场论模型进行研究。该模型根据成分夸克场使用自由狄拉克哈密顿量作为轻夸克-反夸克对创建项，并根据成分夸克和反夸克使用介子态的显式构造来研究衰变过程。赝标量-矢量 (PV) 介子混合导致赝标量（矢量的纵向分量）介子质量下降（上升）。可以观察到隐藏的奇异介子的质量修改，由φ - η'混合，非常突出，而中性开放奇异介子由于混合而在质量上只有微小的变化。带电开放奇异介子的质量改变是由于朗道能级贡献和 PV 混合之间的相互作用，并且观察到后一种效应在大磁场值下占主导地位。矢量介子衰减宽度 (φ → ķķ̄和ķ*→ ķπ) 涉及带电介子的宽度与涉及中性介子的宽度有很大不同，这是由于朗道能级对带电介子的额外贡献。