Description
Title: Deformed CPT Symmetry from Curved Momentum Space
Abstract: The asymmetry of curved momentum space in κ-deformed field theories sheds new light on the fate of CPT symmetry in deformed relativistic frameworks based on Hopf algebras. Based on our recent work (Phys. Rev. D 113 (2026) 2), we show that charge conjugation is incompatible with κ-Poincaré invariance, while the geometric structure of momentum space naturally suggests a deformation of time-reversal symmetry leading to a deformed realization of CPT invariance. These results clarify the role of discrete symmetries in quantum-gravity–inspired models based on Hopf-algebra deformations and may provide a useful framework for exploring phenomenological implications related to tests of discrete symmetries.