# A New Left-Right Symmetry Model

## TL;DR

This paper introduces a novel left-right symmetry model that incorporates a global quantum number, avoids Majorana neutrinos, and explains baryon asymmetry and entropy production through decay of heavy dual particles.

## Contribution

It proposes a new L-R symmetry framework with a global quantum number and dual particles, providing mechanisms for neutrino oscillations and baryon asymmetry.

## Key findings

- No Majorana neutrinos due to global quantum number F.
- Heavy L-R dual particles decay, producing entropy.
- Model explains baryon asymmetry and avoids BBN constraints.

## Abstract

We propose a new L-R symmetry model where the L-R symmetry transformation reverses both the L-R chirality and the local quantum number. We add to the model a global quantum number $F$ whose value is one for fermions (minus one for anti fermion) and vanishes for bosons. For each standard model (SM) particle, we have the corresponding L-R dual particle whose mass is very large and which should have decayed at the current low energy level. Due to the global quantum number $F$, there is no Majorana neutrino in the model but a Dirac seesaw mechanism can still occur and the usual three active neutrinos oscillation can still be realized. We add two leptoquarks and their L-R duals, for generating the baryon number asymmetry and for facilitating the decay of the L-R dual particles. The decay of the L-R dual particles will produce a large entropy to the SM sector and gives a mechanism for avoiding the big bang nucleosynthesis constraint.