标题： 电荷守恒和等效原理 显示英文标题

标题： Charge conservation and Equivalence principle

摘要： $TH\epsilon\mu$形式主义被开发用于研究非度规引力理论。 在本信中我们表明，违反局部洛伦兹不变性（LLI）或局部位置不变性（LPI）的理论也违反电荷守恒。 利用这种违反的上限，我们可以对爱因斯坦等效原理（EEP）的违反施加非常严格的限制。 这些限制反过来严重限制了低能物理的基于弦的模型。 显示英文摘要

摘要： The $TH\epsilon\mu$ formalism was developed to study nonmetric theories of gravitation. In this letter we show that theories that violate Local Lorentz Invariance (LLI) or Local Position Invariance (LPI) also violate charge conservation. Using upper bounds on this violation we can put very stringent limits to violations of Einstein Equivalence Principle (EEP). These limits, in turn, severely restrict string-based models of low energy physics.