TeV scale double seesaw in left-right symmetric theories

Understand

We extend the Type I and Type III seesaw mechanisms to generate neutrino masses within the left-right symmetric theories where parity is spontaneously broken.

• We construct a next to minimal left-right symmetric model where neutrino masses are generated through a variant $double$ seesaw mechanism.
• In our model at least one of the triplet fermions and the right handed neutrinos are at TeV scale and others are heavy.
• The phenomenological aspects and testability of the TeV scale particles at collider experiments are discussed.