Programme

O.16 -- Oral, VCTP-51

Date: Tuesday, 4 August 2026

Time: 11:50-12:10

Physical state of axion in DFSZ model

V. H. Binh and H. N. Long

Institute of Physics,VAST, Bogoliubov Laboratory of Theoretical Physics, JINR, Subatomic Physics Research Group, STAI, VLU, Faculty of Applied Technology, School of Technology, VLU,

Physical state of axion in the model is determined by diagonalizing the squared mass mixing matrix of CP-odd sector as well as applying Peccei - Quinn mechanism to determine PQ charges of particles that are used in general form of axion. In the model under consideration, PQ charge of the nontrivial singlet scalar and the mixing angle between PQ charges of neutral components of doublet scalars are parameters for other PQ charges of particles in the model. The anomaly couplings of axion is studied in comparison with other Beyond Standard Models which also contain axion arising from PQ symmetry spontaneous breaking. There is a new kind of triple-coupling arisen from kinetic term of scalars contributes to axion decay into a pair of photon, together with anomaly coupling.

Presenter: Vũ Hoà Bình