Seesaw at LHC

Details Seesaw at LHC Seesaw at LHC

2006-12-04

arxiv.org/abs/hep-ph/0612029v2

JHEP 0708:014,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages; the possibility of lepton violating signatures at LHC stressed, relevant cross sections and branching ratios estimate

Scientific paper

10.1088/1126-6708/2007/08/014

We study the implementation of the type III seesaw in the ordinary nonsupersymmetric SU(5) grand unified theory. This allows for an alternative definition of the minimal SU(5) model, with the inclusion of the adjoint fermionic multiplet. The main prediction of the theory is the light fermionic SU(2) triplet with mass at the electroweak scale. Due to their gauge couplings, these triplets can be produced pair-wise via Drell-Yan, and due to the Majorana nature of the neutral component their decays leave a clear signature of same sign di-leptons and four jets. This allows for their possible discovery at LHC and provides an example of directly measurable seesaw parameters.

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