More on R-parity and lepton family number violating couplings from muon(ium) conversion, and tau and pi0 decays

Kim, Jihn E.; Ko, Pyungwon; Lee, Dae-Gyu

doi:10.1103/PhysRevD.56.100

More on R-parity and lepton family number violating couplings from muon(ium) conversion, and tau and pi0 decays

Jan, 1997

13 pages

Published in:

Phys.Rev.D 56 (1997) 100-106

e-Print:

hep-ph/9701381 [hep-ph]

DOI:

10.1103/PhysRevD.56.100

Report number:

SNUTP-96-073

View in:

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Abstract:

We present a new class of constraints to the lepton-family number and R-parity violating couplings from muonium conversion,

\mu~{-} + {_{22}~{48}} Ti \to e~{-} + {_{22}~{48}} Ti

, a class of tau decays,

\tau \to l +

(light meson) with

l= \mu or e

, and

J/\psi

and

\pi~0

decays into a lepton pair. We find that

\mu~{-} + {_{22}~{48}} Ti \to e~- + {_{22}~{48}} Ti

provides one of the strongest constraints along with

\Delta m_{K}, \Delta m_{B}

,

\mu \to e \gamma

and the neutrinoless double

\beta

decay. Search for these lepton-family number violating (LFNV) decays forbidden in the standard model is clearly warranted in various low-energy experiments such as Tau-Charm Factories and PSI, etc.

11.30.Fs
13.20.Gd
11.30.Er
13.20.Cz
supersymmetry
R parity: violation
lepton number: violation
effective Lagrangian
muon nucleus: interaction
titanium

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