Boundary anomalous dimensions from BCFT: O($N$)-symmetric ${\varphi }^{2n}$ theories with a boundary and higher-derivative generalizations

Yongwei Guo, Wenliang Li

We investigate the ${\varphi }^{2n}$ deformations of the O($N$)-symmetric (generalized) free theories with a flat boundary, where $n⩾2$ is an integer. The generalized free theories…