SCALE LIMITS for Contact Interactions: $\Lambda\mathrm {( {{\mathit \ell}} {{\mathit \nu}} {{\mathit \ell}} {{\mathit \nu}} )}$

INSPIRE   PDGID:
S054CTN
VALUE (TeV) CL% DOCUMENT ID TECN  COMMENT
$\bf{>3.10}$ 90 1
JODIDIO
1986
SPEC $\Lambda_{LR}^{\pm}$( ${{\mathit \nu}_{{{\mu}}}}{{\mathit \nu}_{{{e}}}}{{\mathit \mu}}{{\mathit e}}$ )
• • We do not use the following data for averages, fits, limits, etc. • •
$>3.8$ 2
DIAZCRUZ
1994
RVUE $\Lambda_{LL}^+$( ${{\mathit \tau}}{{\mathit \nu}_{{{\tau}}}}{{\mathit e}}{{\mathit \nu}_{{{e}}}}$ )
$>8.1$ 2
DIAZCRUZ
1994
RVUE $\Lambda_{LL}^-$( ${{\mathit \tau}}{{\mathit \nu}_{{{\tau}}}}{{\mathit e}}{{\mathit \nu}_{{{e}}}}$ )
$>4.1$ 3
DIAZCRUZ
1994
RVUE $\Lambda_{LL}^+$( ${{\mathit \tau}}{{\mathit \nu}_{{{\tau}}}}{{\mathit \mu}}{{\mathit \nu}_{{{\mu}}}}$ )
$>6.5$ 3
DIAZCRUZ
1994
RVUE $\Lambda_{LL}^-$( ${{\mathit \tau}}{{\mathit \nu}_{{{\tau}}}}{{\mathit \mu}}{{\mathit \nu}_{{{\mu}}}}$ )
1  JODIDIO 1986 limit is from ${{\mathit \mu}^{+}}$ $\rightarrow$ ${{\overline{\mathit \nu}}_{{{\mu}}}}{{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}}$ . Chirality invariant interactions $\mathit L$ = ($\mathit g{}^{2}/\Lambda {}^{2}$) $\lbrack{}{{\mathit \eta}}_{\mathit LL}$ (${{\overline{\mathit \nu}}_{{{ {{\mathit \mu}} {{\mathit L}} }}}}{{\mathit \gamma}}{}^{\alpha }{{\mathit \mu}_{{{L}}}}$) (${{\overline{\mathit e}}_{{{L}}}}{{\mathit \gamma}}_{\alpha }{{\mathit \nu}_{{{ {{\mathit e}} {{\mathit L}} }}}}$) $+$ ${{\mathit \eta}_{{{LR}}}}$ (${{\overline{\mathit \nu}}_{{{ {{\mathit \mu}} {{\mathit L}} }}}}{{\mathit \gamma}}{}^{\alpha }{{\mathit \nu}_{{{ {{\mathit e}} {{\mathit L}} }}}}$ (${{\overline{\mathit e}}_{{{R}}}}{{\mathit \gamma}_{{{\alpha}}}}{{\mathit \mu}_{{{R}}}})\rbrack{}$ with $\mathit g{}^{2}/4{{\mathit \pi}}$ = 1 and (${{\mathit \eta}}_{\mathit LL},{{\mathit \eta}}_{\mathit LR}$) = (0,$\pm{}$1) are taken. No limits are given for $\Lambda {}^{\pm{}}_{\mathit LL}$ with (${{\mathit \eta}}_{\mathit LL},{{\mathit \eta}}_{\mathit LR}$) = ($\pm{}$1,0). For more general constraints with right-handed neutrinos and chirality nonconserving contact interactions, see their text.
2  DIAZCRUZ 1994 limits are from $\Gamma\mathrm {( {{\mathit \tau}} \rightarrow {{\mathit e}} {{\mathit \nu}} {{\mathit \nu}} )}$ and assume flavor-dependent contact interactions with $\Lambda\mathrm {( {{\mathit \tau}} {{\mathit \nu}_{{{\tau}}}} {{\mathit e}} {{\mathit \nu}_{{{e}}}} )}{}\ll\Lambda\mathrm {( {{\mathit \mu}} {{\mathit \nu}_{{{\mu}}}} {{\mathit e}} {{\mathit \nu}_{{{e}}}} )}$.
3  DIAZCRUZ 1994 limits are from $\Gamma\mathrm {( {{\mathit \tau}} \rightarrow {{\mathit \mu}} {{\mathit \nu}} {{\mathit \nu}} )}$ and assume flavor-dependent contact interactions with $\Lambda\mathrm {( {{\mathit \tau}} {{\mathit \nu}_{{{\tau}}}} {{\mathit \mu}} {{\mathit \nu}_{{{\mu}}}} )}{}\ll\Lambda\mathrm {( {{\mathit \mu}} {{\mathit \nu}_{{{\mu}}}} {{\mathit e}} {{\mathit \nu}_{{{e}}}} )}$.
References:
DIAZCRUZ 1994
PR D49 2149 Limits on the Scale of Compositeness from Leptonic ${{\mathit \tau}}$ Decays
JODIDIO 1986
PR D34 1967 Search for Right Handed Currents in Muon Decay
Also
PR D37 237 (erratum) Search for Right Handed Currents in Muon Decay