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arXiv 2301.04538hep-thgr-qcmath-phmath.MP
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伽利略费米子:经典与量子层面

Galilean fermions: Classical and quantum aspects

Aditya Sharma

AI总结:

本研究针对3+1维与标量场最小耦合的无质量伽利略费米子,通过零化约得到经典拉格朗日量并构造守恒荷,经路径积分分析发现理论可重整化,且量子修正一阶会出现质量标度、共形对称性破缺,由β函数验证。

摘要:

我们研究了3+1维中伽利略费米子的经典与量子性质,选取了与标量场最小耦合的无质量伽利略费米子作为研究对象。在经典层面,该理论的拉格朗日量通过对高一维的相对论理论进行零化约得到,所得理论在无限伽利略共形对称性下保持不变,我们利用诺特方法构造了对应的无限守恒荷。随后我们采用路径积分技术探究该理论的量子性质,发现该理论是可重整化的。该理论的一个新特征是质量标度在量子修正一阶时出现,其共形对称性在量子层面发生破缺,我们通过构造该理论的β函数证实了这一点。

英文摘要:

We study the classical and quantum "properties" of Galilean fermions in 3+1 dimensions. We have taken the case of massless Galilean fermions minimally coupled to the scalar field. At the classical level, the Lagrangian is obtained by null reducing the relativistic theory in one higher dimension. The resulting theory is found to be invariant under infinite Galilean conformal symmetries. Using Noether's procedure, we construct the corresponding infinite conserved charges. Path integral techniques are then employed to probe the quantum "properties" of the theory. The theory is found to be renormalizable. A novel feature of the theory is the emergence of mass scale at the first order of quantum correction. The conformal symmetry of the theory breaks at the quantum level. We confirm this by constructing the beta function of the theory.

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