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arXiv 1109.3871math-phmath.MP
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黎曼时空中自旋S=3/2的粒子

Particle with spin S=3/2 in Riemannian space-time

V. M. Red'kov

摘要:

本文研究了由自旋为3/2的拉里塔-施温格拉格朗日量推广到黎曼时空的16分量矢量双旋量场方程。附加的一般协变约束的字段,这对于某些时空模型大大简化了原来的波动方程。详细说明了无质量自旋3/2场的描述特点。在无质量的平坦Minkowski空间中,主波方程存在规范不变性,这使得产生任意(规范)双旋量函数的4-梯度形式的整类平凡解的可能性降低,其中f ^{0}_{c} = PDMATHABMM_(?)对黎曼模型的这一性质进行了推广,证明了在一般协变情形下,当Ricci张量服从恒等式R_{αβ} - {1 \over 2} R g_{αβ} = 0时,存在梯度型解<$^{0}_β =(\nabla_β + Γ_β)<$.

英文摘要:

Equations for 16-component vector-bispinor field, originated from Rarita-Schwinger Lagrangian for spin 3/2 field extended to Riemannian space-time are investigated. Additional general covariant constrains for the field are produced, which for some space-time models greatly simplify original wave equation. Peculiarities in description of the massless spin 3/2 field are specified. In the flat Minkowski space for massless case there exist gauge invariance of the main wave equation, which reduces to possibility to produce a whole class of trivial solutions in the the form of 4-gradient of arbitrary (gauge) bispinor function, Ψ^{0}_{c} = \partial_{c} ψ. Generalization of that property for Riemannian model is performed; it is shown that in general covariant case solutions of the gradient type Ψ^{0}_β = (\nabla_β + Γ_β)Ψexist in space-time regions where the Ricci tensor obeys an identity R_{αβ} - {1 \over 2} R g_{αβ} = 0.

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