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arXiv 1211.5367hep-thhep-ph
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外部背景下大质量Weyl中微子的正则量子化、路径积分表示和伪经典描述

Canonical quantization, path integral representations, and pseudoclassical description of massive Weyl neutrinos in external backgrounds

Maxim Dvornikov, D. M. Gitman

摘要:

我们研究大质量的1/2自旋粒子在各种外部背景下牢记应用中微子物理。我们主要对大规模的马约拉纳(Weyl)油田感兴趣。然而,大质量中性狄拉克粒子也被考虑。我们制定了经典的拉格朗日理论的质量外尔场的格拉斯曼奇二分量旋量。然后,我们构造了这样一个理论的哈密顿公式,它原来是一个具有第二类约束的理论。利用这个公式,我们规范地描述了有质量的自由外尔场。我们推导出外尔场的传播子,并将它们与大质量狄拉克粒子的传播子联系起来。我们还研究了大质量外尔粒子在背景物质中的传播。我们找到了这样一个场的传播子的路径积分表示,以及相应的伪经典粒子作用。考虑了外尔场与物质相互作用的无质量极限,并与其他工作的结果进行了比较。最后,构造了具有反常磁矩的中性质量Dirac粒子在背景物质和外电磁场中运动的传播子的路径积分表示,以及相应的赝经典粒子作用量.

英文摘要:

We study massive 1/2-spin particles in various external backgrounds keeping in mind applications to neutrino physics. We are mainly interested in massive Majorana (Weyl) fields. However, massive neutral Dirac particles are also considered. We formulate classical Lagrangian theory of the massive Weyl field in terms of Grassmann-odd two-component spinors. Then we construct the Hamiltonian formulation of such a theory, which turns out to be a theory with second-class constraints. Using this formulation we canonically quantize the massive free Weyl field. We derive propagators of the Weyl field and relate them to the propagator of a massive Dirac particle. We also study the massive Weyl particles propagating in the background mater. We find the path integral representation for the propagator of such a field, as well as the corresponding pseudoclassical particle action. The massless limit of the Weyl field interacting with the matter is considered and compared with results of other works. Finally, the path integral representation for the propagator of the neutral massive Dirac particle with an anomalous magnetic moment moving in the background matter and external electromagnetic field, as well as the corresponding pseudoclassical particle action are constructed.

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