论文标题
关于平等破裂的思考
Reflections on Parity Breaking
论文作者
论文摘要
在我们周围的世界中，奇偶校验和CP对称性被打破。尽管如此，奇偶校验（或CP）可能是在我们的宇宙中使用的量规对称性。除了标准模型以外的许多物理方面，这是假定的，包括经典的纳尔逊 - 巴尔 - 巴尔关于强大的CP问题的建议。测量平均值只能出现在量子重力中，在量子重力中，它与可定向和不可定向的时空歧管上的路径积分相对应。我们表明，评分平价的自发破裂会导致稳定的域墙，并描述对具有衡量平价的模型的宇宙学的含义。这些域墙具有不寻常的电荷，从表面上具有与仪表充电和全球费用共同的特征。我们表明，当存在Swampland Coobordism猜想（包括世界末日的麸皮）所要求的完整动力学对象时，这些异常的电荷与量子重力中的全局对称性的预期缺失是一致的。
Parity and CP symmetries are broken in the world around us. Nonetheless, parity (or CP) may be a gauge symmetry which is higgsed in our universe. This is assumed in many scenarios for physics beyond the Standard Model, including the classic Nelson--Barr proposal for the Strong CP problem. Gauged parity can only arise in quantum gravity, where it corresponds to a path integral over both orientable and non-orientable spacetime manifolds. We show that spontaneous breaking of gauged parity leads to exactly stable domain walls, and describe the implications for the cosmology of models with gauged parity. These domain walls carry an unusual sort of charge, which superficially has features in common with both gauge charges and global charges. We show that these unusual charges are consistent with the expected absence of global symmetries in quantum gravity when there exists a complete spectrum of dynamical objects required by the Swampland Cobordism Conjecture, including end-of-the-world branes.
