Suppression of Lepton Number Violation Mediated by $\Delta$ I = 0 Mass Fermions

del Aguila, F.; Bowick, Mark J.

doi:10.1016/0370-2693(82)90264-7

Suppression of Lepton Number Violation Mediated by $\Delta$ I = 0 Mass Fermions

F. del Aguila
(
- Florida U.
)
,
Mark J. Bowick
(
- Caltech and
- Florida U.
)

Jul, 1982

7 pages

Published in:

Phys.Lett.B 119 (1982) 144-150

Published: 1982

DOI:

10.1016/0370-2693(82)90264-7

Report number:

UFTP-82-20

View in:

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Abstract: (Elsevier)

We add a lepton doublet with ΔI = 0 mass M to the minimal Weinberg-Salam model. We then calculate the transition rate for μ → eγ for all M as a function of an arbitrary mixing parameter δ of order a normal lepton mass. For δ ⪅ 0.4 GeV, M can be as low as 20 GeV. We show that heavy gDI = 0 fermions decouple throught their highly but naturally suppressed mixing angles with normal fermions and not through diagrammatic cancellations. Models with heavy ΔI = 0 fermions evade the commonly used conditions for natural suppression of rare processes in gauge theories.

Salam-Weinberg model
FERMION: ISOSPIN
ISOSPIN: FERMION
MUON: RADIATIVE DECAY
RADIATIVE DECAY: MUON
FERMION: MIXING ANGLE
LEPTON NUMBER: VIOLATION
decoupling
DECOUPLING: COUPLING
FERMION: MASS

References(22)

Figures(0)

Infrared Singularities and Massive Fields

Thomas Appelquist
(
- Harvard U.
)
,
J. Carazzone
(
- Harvard U.
)

- Phys.Rev.D 11 (1975) 2856,
- In *Lichtenberg, D. B. ( Ed.), Rosen, S. P. ( Ed.): Developments In The Quark Theory Of Hadrons, Vol. 1*, 267-272. ( Phys. Rev. D11 ( 1975) 2856-2861)
•
DOI:
- 10.1103/PhysRevD.11.2856

A Model of Leptons

Steven Weinberg
(
- MIT, LNS
)

- Phys.Rev.Lett. 19 (1967) 1264-1266,
- Also in *Lichtenberg, D. B. (ed.), Rosen, S. P. (ed.): Developments In The Quark Theory Of Hadrons, Vol. 1*, 157-159,
- In *Lai, C. H. (ed.): Gauge Theory Of Weak and Electromagnetic Interactions*, 185-187,
- In *Rosner, J. L. (ed.): New Particles*, 26-28
•
DOI:
- 10.1103/PhysRevLett.19.1264

Partial Symmetries of Weak Interactions

S.L. Glashow
(
- Copenhagen U.
)

- Nucl.Phys. 22 (1961) 579-588,
- Also in *Lai, C. H. (Ed.): Gauge Theory Of Weak and Electromagnetic Interactions*, 171-180
•
DOI:
- 10.1016/0029-5582(61)90469-2

Lepton Number as the Fourth Color

Jogesh C. Pati
(
- Maryland U.
)
,
Abdus Salam
(
- ICTP, Trieste and
- Imperial Coll., London
)

- Phys.Rev.D 10 (1974) 275-289,
- Phys.Rev.D 11 (1975) 703-703 (erratum)
•
DOI:
- 10.1103/PhysRevD.10.275

Unity of All Elementary Particle Forces

H. Georgi
(
- Harvard U.
)
,
S.L. Glashow
(
- Harvard U.
)

- Phys.Rev.Lett. 32 (1974) 438-441,
- Also in *Lichtenberg, D.B. (ed.), Rosen, S.P. (ed.): Developments In The Quark Theory Of Hadrons, Vol. 1*, 492-495, and in *Froggatt, C.D., Nielsen, H.B.: Origin of symmetries* 330-333
•
DOI:
- 10.1103/PhysRevLett.32.438

Hierarchy of Interactions in Unified Gauge Theories

- Phys.Rev.Lett. 33 (1974) 451-454
•
DOI:
- 10.1103/PhysRevLett.33.451

Aspects of the Grand Unification of Strong, Weak and Electromagnetic Interactions

- Nucl.Phys.B 135 (1978) 66-92,
- Also in *Mohapatra, R. N. (ed.), Lai, C. H. (ed.): Gauge Theories Of Fundamental Interactions*, 506-532
•
DOI:
- 10.1016/0550-3213(78)90214-6

Uncertainties in the Proton Lifetime

- Nucl.Phys.B 176 (1980) 61-99
•
DOI:
- 10.1016/0550-3213(80)90064-4

A Grand Unified Theory Obtained from Broken Supergravity

- Phys.Lett.B 94 (1980) 343-348
•
DOI:
- 10.1016/0370-2693(80)90893-X

Unified Interactions of Leptons and Hadrons

Harald Fritzsch
(
- Caltech
)
,
Peter Minkowski
(
- Caltech
)

- Annals Phys. 93 (1975) 193-266,
- In *Mohapatra, R. N. ( Ed.), Lai, C. H. ( Ed.): Gauge Theories Of Fundamental Interactions*, 432-505
•
DOI:
- 10.1016/0003-4916(75)90211-0

A Universal Gauge Theory Model Based on E6

- Phys.Lett.B 60 (1976) 177-180
•
DOI:
- 10.1016/0370-2693(76)90417-2

Quark Lepton Symmetry and Mass Scales in an E6 Unified Gauge Model

Yoav Achiman
(
- Heidelberg U.
)
,
Berthold Stech
(
- Heidelberg U.
)

- Phys.Lett.B 77 (1978) 389-393
•
DOI:
- 10.1016/0370-2693(78)90584-1

Calculable Masses in Grand Unified Theories

Mark J. Bowick
(
- Caltech
)
,
Pierre Ramond
(
- Florida U.
)

- Phys.Lett.B 103 (1981) 338-342
•
DOI:
- 10.1016/0370-2693(81)90237-9

Supersymmetry

- Phys.Rept. 32 (1977) 249-334
•
DOI:
- 10.1016/0370-1573(77)90066-7

Natural Suppression of Symmetry Violation in Gauge Theories: Muon - Lepton and Electron Lepton Number Nonconservation

Benjamin W. Lee
(
- Fermilab
)
,
Robert E. Shrock
(
- Fermilab
)

- Phys.Rev.D 16 (1977) 1444
•
DOI:
- 10.1103/PhysRevD.16.1444

The Decay mu --> e + gamma in Models with Neutral Heavy Leptons

J.D. Bjorken
(
- SLAC
)
,
Kenneth D. Lane
(
- SLAC
)
,
Steven Weinberg
(
- Stanford U., Phys. Dept.
)

- Phys.Rev.D 16 (1977) 1474
•
DOI:
- 10.1103/PhysRevD.16.1474

Muon Number Nonconservation Effects in a Gauge Theory with V A Currents and Heavy Neutral Leptons

- Phys.Rev.D 16 (1977) 1425
•
DOI:
- 10.1103/PhysRevD.16.1425

Xi-limiting process in spontaneously broken gauge theories

K. Fujikawa
(
- Chicago U., EFI
)

- Phys.Rev.D 7 (1973) 393-398
•
DOI:
- 10.1103/PhysRevD.7.393

Generalized Renormalizable Gauge Formulation of Spontaneously Broken Gauge Theories

- Phys.Rev.D 6 (1972) 2923-2943,
- Also in *Lai, C. H. (ed.): Gauge Theory Of Weak and Electromagnetic Interactions*, 234-254
•
DOI:
- 10.1103/PhysRevD.6.2923

Decoupling, Effective Lagrangian, and Gauge Hierarchy in Spontaneously Broken Nonabelian Gauge Theories

Yoichi Kazama
(
- Fermilab
)
,
York-Peng Yao
(
- Michigan U.
)

- Phys.Rev.D 25 (1982) 1605
•
DOI:
- 10.1103/PhysRevD.25.1605

Natural Conservation Laws for Neutral Currents

Sheldon L. Glashow
(
- Harvard U.
)
,
Steven Weinberg
(
- Harvard U.
)

- Phys.Rev.D 15 (1977) 1958
•
DOI:
- 10.1103/PhysRevD.15.1958

Constraints on Charged Higgs Couplings

- Phys.Rev.D 21 (1980) 1393
•
DOI:
- 10.1103/PhysRevD.21.1393

Suppression of Lepton Number Violation Mediated by Δ\DeltaΔ I = 0 Mass Fermions

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Suppression of Lepton Number Violation Mediated by $\Delta$ I = 0 Mass Fermions