LIMIT ON ${{\mathit \mu}^{-}}$ $\rightarrow$ ${{\mathit e}^{-}}$ CONVERSION

Forbidden by lepton family number conservation.

${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{}\mathrm {Cu}$ $\rightarrow$ ${{\mathit e}^{-}}{}^{}\mathrm {Cu}{)}$ / ${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{}\mathrm {Cu}$ $\rightarrow$ capture${)}$

INSPIRE  
VALUE CL% DOCUMENT ID TECN
• • We do not use the following data for averages, fits, limits, etc. • •
$<1.6 \times 10^{-8}$ 90
BRYMAN
1972
SPEC
References:
BRYMAN 1972
PRL 28 1469 Search for the Reaction ${{\mathit \mu}^{-}}$ ${}^{}\mathrm {Cu}$ $\rightarrow$ ${{\mathit e}^{+}}{}^{}\mathrm {Co}$