Collider signatures for the heavy lepton triplet in the type I+III seesaw mechanism

Journal Article · Wed Sep 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.053004· OSTI ID:21432947

Arhrib, Abdesslam ^[1]; Bajc, Borut ^[2]; Ghosh, Dilip Kumar ^[3]; Han, Tao ^[4]; Huang, Gui-Yu ^[5]; Puljak, Ivica ^[6]; Senjanovic, Goran ^[7]

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1. Departement de Mathematiques, Faculte des Sciences et Techniques B.P 416 Tangier (Morocco)
2. J. Stefan Institute, 1000 Ljubljana (Slovenia)
3. Department of Theoretical Physics and Centre for Theoretical Sciences Indian Association for the Cultivation of Science 2A 2B Raja S.C. Mullick Road, Kolkata 700 032 (India)
4. Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)
5. Department of Physics, University of California, Davis, California 95616 (United States)
6. FESB, University of Split, Split (Croatia)
7. International Centre for Theoretical Physics, Trieste (Italy)

The minimal SU(5) theory augmented by the fermionic adjoint representation restores the coupling constant unification and gives realistic neutrino masses and mixing through the hybrid Type I and Type III seesaw. The crucial prediction of the theory is an SU(2) lepton triplet with the mass below TeV. We study the signature of these heavy leptons at the hadron and lepton colliders. The smoking gun evidence of the theory, as in general seesaw mechanisms, is {Delta}L=2 lepton-number violation through events of a pair of like-sign leptons plus four jets without significant missing energy at hadron colliders. We find that via this unique channel the heavy lepton can be searched for up to a mass of 200 GeV at the Tevatron with 8 fb{sup -1}, and up to 450 (700) GeV at the LHC of 14 TeV C.M. energy with 10(100) fb{sup -1}. The 7 TeV LHC run of 1 fb{sup -1} is expected to probe a mass window of 110-200 GeV. We also comment on how to distinguish this theory from other models with similar heavy leptons. Finally, we compare the production rates and angular distributions of heavy leptons in e{sup +}e{sup -} collisions for various models.

• OSTI ID: 21432947
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 5; Other Information: DOI: 10.1103/PhysRevD.82.053004; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
CERN LHC
COMPARATIVE EVALUATIONS
COUPLING CONSTANTS
ELECTRON-POSITRON COLLISIONS
FERMILAB TEVATRON
FORECASTING
GEV RANGE 100-1000
HADRONS
HEAVY LEPTONS
LEPTON NUMBER
MASS
MIXING
NEUTRINOS
PARTICLE PRODUCTION
SU-5 GROUPS
TEV RANGE 01-10
TEV RANGE 10-100
ACCELERATORS
COLLISIONS
CYCLIC ACCELERATORS
DISTRIBUTION
ELECTRON COLLISIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EVALUATION
FERMIONS
GEV RANGE
LEPTONS
LIE GROUPS
MASSLESS PARTICLES
POSITRON COLLISIONS
STORAGE RINGS
SU GROUPS
SYMMETRY GROUPS
SYNCHROTRONS
TEV RANGE