Peccei-Quinn mechanism and axion interactions in the 3-3-1 model with Cosmological Inflation

TL;DR

This paper explores the Peccei-Quinn mechanism and axion interactions within a 3-3-1 model incorporating cosmological inflation, detailing charge assignments, couplings, and energy scale effects relevant for axion physics.

Contribution

It introduces a novel PQ charge operator in the 3-3-1 model with inflation and analyzes axion interactions, including couplings and energy scale implications.

Findings

PQ charge difference between up and down quarks is 2

Axion does not couple to charged scalars or gauge bosons

Doubly derivative coupling of axion with inflaton scalar

Abstract

Based on the Peccei-Quinn (PQ) assignment, the PQ charge operator in the 3-3-1 model with Cosmological Inflation is constructed in terms of diagonal generators $T_3$ and $T_8$ of the $SU(3)_L$ subgroup. The formula shows that difference of PQ charges of up and down quarks is 2, i.e., $\De Q_A =2$, while for electric charge, are assumed to be equal, while the ($Q_A$) are opposite. PQ charge of neutral scalars equal $\pm 2$, while for charged scalars, it vanishes. The couplings of axion with fermions are presented. To have correct kinetic term for the axion, the PQ scale $f_{a}$ is to be VEV of the singlet scalar boson, namely, $f_{a}= v_\phi$. The photon couples to charged particles only, while in this model, the axion does not couple to charged scalar/gauge bosons. The point is worth emphasizing that the axion has doubly derivative coupling with scalar playing the role of inflaton. The new effects mainly happen in the energy region from $10^7 \, \gev$ to $10^{11} \, GeV$. The chiral effective Lagrangian as usually provides axion mass consistent with model-independent prediction.