Probing the seesaw mechanism at CERN LHC

Journal Article · Sat Sep 01 04:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.055011· OSTI ID:21027714

Bajc, Borut; Nemevsek, Miha ^[1]; Senjanovic, Goran ^[2]

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1. J. Stefan Institute, 1001 Ljubljana (Slovenia)
2. International Centre for Theoretical Physics, Trieste (Italy)

We have recently proposed a simple SU(5) theory with an adjoint fermionic multiplet on top of the usual minimal spectrum. This leads to the hybrid scenario of both type I and type III seesaw and it predicts the existence of the fermionic SU(2) triplet between 100 GeV and 1 TeV for a conventional grand unified theory scale of about 10{sup 16} GeV, with main decays into W (Z) and leptons, correlated through Dirac Yukawa couplings, and lifetimes shorter than about 10{sup -12}sec. These decays are lepton number violating and they offer an exciting signature of {delta}L=2 dilepton events together with 4 jets at future pp (pp) colliders. Increasing the triplet mass endangers the proton stability and so the seesaw mechanism could be directly testable at LHC.

• OSTI ID: 21027714
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 76; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CERN LHC
COUPLING
GEV RANGE
GRAND UNIFIED THEORY
JET MODEL
LEPTON NUMBER
LEPTONS
LIFETIME
PARTICLE DECAY
PROTONS
REST MASS
SU-2 GROUPS
SU-5 GROUPS
TEV RANGE
TRIPLETS
W MINUS BOSONS
W PLUS BOSONS
Z NEUTRAL BOSONS