Testing electroweak scale seesaw models at $e^{-} \gamma$ and $\gamma \gamma$ colliders
Abstract
We investigate the possibilities of probing the electroweak scale seesaw scenarios such as type-I, type-II and type-III seesaw at and colliders. For the case of type-I seesaw, the heavy neutrinos can be produced at colliders in association with a boson. We study a variety of final states in this case including single and multilepton modes in association with jets to estimate bounds on the light-heavy neutrino mixing angle. In case of type-II seesaw, doubly charged multiplets of the SU triplet scalar can be produced in pair at collider. We study the multi-leptonic decay modes coming from this pair production of doubly charged Higgs and show how one can probe neutrino mass hierarchy. We also study same sign boson production from the doubly charged Higgs to study multilepton modes in association with missing energy. From the type-III seesaw, we study same sign dilepton+jets and trilepton+jets modes at collider which are coming from the neutral and charged component of the triplet fermion in association with a boson and boson, respectively. Due to the existing limits on the triplet fermions from the LHC we choose heavier mass so that the gauge boson originated from the decay of a neutral multiplet can be sufficiently boosted producing a fat-jet signature in association with same sign dilepton and trilepton. Finally we estimate bounds on the light neutrino-heavy triplet fermion mixing angle and compare with the existing bounds.
Keywords
Cite
@article{arxiv.2304.06298,
title = {Testing electroweak scale seesaw models at $e^{-} \gamma$ and $\gamma \gamma$ colliders},
author = {Arindam Das and Sanjoy Mandal and Sujay Shil},
journal= {arXiv preprint arXiv:2304.06298},
year = {2023}
}
Comments
53 pages, 30 figures