Looking for hints of a reconstructible seesaw model at the Large Hadron Collider

2014/10/31 by Gulab Bambhaniya, G. Bambhaniya, Sreetama Goswami +4 · 1 citation
Physics and Astronomy · #Collider #Large Hadron Collider #Lepton #Neutrino #Neutrino Physics Research #Neutrino oscillation #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Seesaw molecular geometry #Sterile neutrino #hep-ph

paper · pdf · doi:10.1103/physrevd.91.075007

published as Phys. Rev. D 91, 075007 (2015) · v2: Matches with published version. v1: 19 Pages, 5 figures. Comments are welcome

openalex publication_date 2015/04/09 · arxiv created 2015/04/10 · arxiv updated 2015/04/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We study the production of heavy neutrinos at the Large Hadron Collider through the dominant s-channel production mode as well as the vector boson fusion process. We consider the TeV scale minimal linear seesaw model containing two heavy singlets with the opposite lepton number. This model is fully reconstructible from oscillation data apart from an overall normalization constant which can be constrained from the metastability of the electroweak vacuum and bounds coming from lepton flavor violation searches. The Dirac nature of heavy neutrinos in this model implies suppression of the conventional same-sign-dilepton signal at the Large Hadron Collider. We analyze the collider signatures with the trilepton final state and missing transverse energy as well as vector boson fusion type signals which are characterized by two additional forward tagged jets. Our investigation reveals that due to stringent constraints on light-heavy mixing coming from lepton flavor violation and metastability bounds, the model can be explored only for a light to moderate mass range of heavy neutrinos. We also note that in case of a positive signal, flavor counting of the final trilepton channel can give information about the mass hierarchy of the light neutrinos.

Citations

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• A4-based tri-bimaximal mixing within inverse and linear seesaw schemes
• A standard format for Les Houches Event Files
• Slepton production from gauge boson fusion
• Distinguishing seesaw models at LHC with multi-lepton signals
• Electroweak scale seesaw and heavy Dirac neutrino signals at LHC
• Signatures for Majorana Neutrinos at Hadron Colliders
• Search for a standard model Higgs boson in CMS via vector boson fusion in the H→WW→lνlν channel
• The minimal seesaw model at the TeV scale
• Model for neutrino masses and dark matter
• Verifiable radiative seesaw mechanism of neutrino mass and dark matter
• ALPGEN, a generator for hard multiparton processes in hadronic collisions
• Planck2013 results. XVI. Cosmological parameters
• Minimal radiative neutrino mass mechanism for inverse seesaw models
• Multilepton collider signatures of heavy Dirac and Majorana neutrinos
• FeynRules – Feynman rules made easy
• Large mixing of light and heavy neutrinos in seesaw models and the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC

Cited by

• Combining experimental and cosmological constraints on heavy neutrinos