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arXiv 1301.7708hep-th
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旋量相互作用和非黎曼几何的新分析

Novel Analysis of Spinor Interactions and non-Riemannian Geometry

Orchidea Maria Lecian, Giovanni Montani, Nakia Carlevaro

摘要:

一种新的分析的规范理论的本地洛伦兹群在平坦和弯曲的时空中实施,并分析由此产生的动力学的规范位的几何解释。本文首先用二阶形式讨论了局域洛伦兹变换的杨-米尔斯图象。为了在洛伦兹规范连接与扭曲张量相一致的情况下用拉格朗日方法重现第二种Cartan结构方程,必须假设洛伦兹规范场与自旋连接之间存在相互作用项。涉及重力,扭转和旋量的全貌是由一组耦合的场方程,它允许一个解释引力自旋连接和物质自旋密度作为源项的杨-米尔斯方程。由于扭曲张量的非阿贝尔性质,它获得了传播性质,在洛伦兹联系消失的极限下恢复了纯接触相互作用。

英文摘要:

A novel analysis of the gauge theory of the local Lorentz group is implemented both in flat and in curved space-time, and the resulting dynamics is analyzed in view of the geometrical interpretation of the gauge potential. The Yang-Mills picture of local Lorentz transformations is first approached in a second-order formalism. For the Lagrangian approach to reproduce the second Cartan structure equation as soon as the Lorentz gauge connections are identified with the contortion tensor, an interaction term between the Lorentz gauge fields and the spin connections has to be postulated. The full picture involving gravity, torsion and spinors is described by a coupled set of field equations, which allows one to interpret both gravitational spin connections and matter spin density as the source term for the Yang-Mills equations. The contortion tensor acquires a propagating character, because of its non-Abelian feature, and the pure contact interaction is restored in the limit of vanishing Lorentz connections.

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