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

Abstract

We study the lepton-flavor-violating reaction {mu}{sup +}e{sup -}{yields}e{sup +}e{sup -} 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{yields}e{sup +}e{sup -} 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{sup +}e{sup -} the extremely small result Br(M{yields}e{sup +}e{sup -})<10{sup -19} in both scenarios. Alternatively, for {mu}{sup +}e{sup -} collisions up to {radical}(s){approx}50 GeV, we find {sigma}({mu}{sup +}e{sup -}{yields}e{sup +}e{sup -})<10{sup -5} fb, while for energies above the W{sup +}W{sup -} threshold we find {sigma}({mu}{sup +}e{sup -}{yields}W{sup +}W{sup -}) up to {approx}1 fb.

Authors:
; ; ;  [1]
  1. Department of Physics, Universidad Tecnica Federico Santa Maria, Valparaiso (Chile)
Publication Date:
OSTI Identifier:
20873124
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 74; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevD.74.093011; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ELECTRON-MUON INTERACTIONS; ELECTRONS; FLAVOR MODEL; GEV RANGE; LEPTON NUMBER; MUONIUM; MUONS PLUS; NEUTRINOS; PARTICLE DECAY; POSITRONS; STANDARD MODEL; W MINUS BOSONS; W PLUS BOSONS

Citation Formats

Cvetic, G, Dib, C, Kim, C S, Kim, J D, Department of Physics, Yonsei University, Seoul 120-749, and Department of Physics, Seoul National University, Seoul 151-742. Lepton flavor violation in muonium decay and muon colliders in models with heavy neutrinos. United States: N. p., 2006. Web. doi:10.1103/PHYSREVD.74.093011.
Cvetic, G, Dib, C, Kim, C S, Kim, J D, Department of Physics, Yonsei University, Seoul 120-749, & Department of Physics, Seoul National University, Seoul 151-742. Lepton flavor violation in muonium decay and muon colliders in models with heavy neutrinos. United States. https://doi.org/10.1103/PHYSREVD.74.093011
Cvetic, G, Dib, C, Kim, C S, Kim, J D, Department of Physics, Yonsei University, Seoul 120-749, and Department of Physics, Seoul National University, Seoul 151-742. 2006. "Lepton flavor violation in muonium decay and muon colliders in models with heavy neutrinos". United States. https://doi.org/10.1103/PHYSREVD.74.093011.
@article{osti_20873124,
title = {Lepton flavor violation in muonium decay and muon colliders in models with heavy neutrinos},
author = {Cvetic, G and Dib, C and Kim, C S and Kim, J D and Department of Physics, Yonsei University, Seoul 120-749 and Department of Physics, Seoul National University, Seoul 151-742},
abstractNote = {We study the lepton-flavor-violating reaction {mu}{sup +}e{sup -}{yields}e{sup +}e{sup -} 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{yields}e{sup +}e{sup -} 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{sup +}e{sup -} the extremely small result Br(M{yields}e{sup +}e{sup -})<10{sup -19} in both scenarios. Alternatively, for {mu}{sup +}e{sup -} collisions up to {radical}(s){approx}50 GeV, we find {sigma}({mu}{sup +}e{sup -}{yields}e{sup +}e{sup -})<10{sup -5} fb, while for energies above the W{sup +}W{sup -} threshold we find {sigma}({mu}{sup +}e{sup -}{yields}W{sup +}W{sup -}) up to {approx}1 fb.},
doi = {10.1103/PHYSREVD.74.093011},
url = {https://www.osti.gov/biblio/20873124}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 9,
volume = 74,
place = {United States},
year = {Wed Nov 01 00:00:00 EST 2006},
month = {Wed Nov 01 00:00:00 EST 2006}
}