协变和光阵面坐标下的Bopp-Podolsky标量电动力学算符和能量动量张量
Bopp-Podolsky Scalar Electrodynamics Propagators and Energy-Momentum Tensor in Covariant and Light-Front Coordinates
摘要：
本文研究了荷电标量玻色子与Bopp-Podolsky规范场的相互作用。Bopp-Podolsky（BP）电动力学具有光子的质量和无质量传播模式，同时保持规范不变性。我们得到的传播的所有领域中存在的模型的高阶推广的线性协变，光前和双横光前规范。尽管BP的原始模型是由高阶拉格朗日导数描述的，但可以通过引入辅助向量场来使用等效的降阶版本。我们计算规范不变的改进的能量动量张量的全降阶相互作用BP模型。除了更传统的正面形式视图，我们还讨论了两个版本的模型中的光前透视。在拉格朗日框架的方法，我们保持明确的协方差在所有步骤，并表明，场传播，以及能量动量张量，可以投到一个光前封闭的形式，使用一般坐标变换的特定属性。
英文摘要：
We consider the interaction between a charged scalar boson and the Bopp-Podolsky gauge fields. The Bopp-Podolsky (BP) electrodynamics possesses both massive and massless propagation modes for the photon, while preserving gauge invariance. We obtain the propagator of all fields present in the model for the higher-order generalizations of the linear covariant, light-front and doubly transverse light-front gauges. Although BP's original model is described by a higher-order derivatives Lagrangian, it is possible to work with an equivalent reduced-order version by means of the introduction of an auxiliary vector field. We compute the gauge-invariant improved energy-momentum tensor for the full reduced-order interacting BP model. Besides the more traditional front-form view, we also discuss the light-front perspective in both versions of the model. Within a Lagrangian framework approach we maintain explicit covariance at all steps and show that the field propagators, as well as the energy-momentum tensor, can be cast into a light-front closed form using specific properties of general coordinate transformations.
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