Lepton flavor violation in muonium decay and muon colliders in models with heavy neutrinos

G. Cvetič, C. Dib, Choong Sun Kim, J. D. Kim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We study the lepton-flavor-violating reaction μ+e-→e+e- within two extensions of the standard model that include heavy neutrinos. The reaction is studied in the low energy limit in the form of muonium decay M→e+e- and in the high energy regime of a muon collider. The two theoretical models we consider are: model I, a typical seesaw model that violates lepton flavor and number by inclusion of extra right-handed neutrinos; and model II, a variant where lepton number is conserved and which includes extra right-handed as well as left-handed neutrinos, singlets under the gauge group. We find for muonium decay into e+e- the extremely small result Br(M→e+e-)<10-19 in both scenarios. Alternatively, for μ+e- collisions up to s∼50GeV, we find σ(μ+e-→e+e-)<10-5 fb, while for energies above the W+W- threshold we find σ(μ+e-→W+W-) up to ∼1 fb.

Original languageEnglish
Article number093011
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume74
Issue number9
DOIs
Publication statusPublished - 2006 Dec 6

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muonium
Neutrinos
leptons
muons
neutrinos
Right handed
Decay
decay
Left handed
Gauge Group
Violate
Energy
Theoretical Model
High Energy
Standard Model
Collision
Inclusion
Model
energy
Scenarios

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Mathematical Physics

Cite this

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Lepton flavor violation in muonium decay and muon colliders in models with heavy neutrinos. / Cvetič, G.; Dib, C.; Kim, Choong Sun; Kim, J. D.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 74, No. 9, 093011, 06.12.2006.

Research output: Contribution to journalArticle

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