# SCALE LIMITS for Contact Interactions: $\Lambda\mathrm {( {{\boldsymbol \ell}} {{\boldsymbol \ell}} {{\boldsymbol \ell}} {{\boldsymbol \ell}} )}$ INSPIRE search

Lepton universality assumed. Limits are for $\Lambda_{LL}^{\pm}$ only. For other cases, see each reference.
$\Lambda_{LL}^+({\mathrm {TeV}}$) $\Lambda_{LL}^-({\mathrm {TeV}}$) CL% DOCUMENT ID TECN  COMMENT
$> 7.9$ $\mathbf {> 10.3}$ 95 1
 2007 A
ALEP $\mathit E_{{\mathrm {cm}}}$= $189 - 209$ GeV
$\mathbf {>9.1}$ >8.2 95
 2006 C
DLPH $\mathit E_{{\mathrm {cm}}}$= $130 - 207$ GeV
• • • We do not use the following data for averages, fits, limits, etc. • • •
$> 7.7$ > 9.5 95 2
 2004 G
OPAL $\mathit E_{{\mathrm {cm}}}$= $130 - 207$ GeV
3
 2003
RVUE
$>9.0$ > 5.2 95
 2000 P
L3 $\mathit E_{{\mathrm {cm}}}$= $130 - 189$ GeV
1  SCHAEL 2007A limits are from $\mathit R_{c}$, $\mathit Q{}^{depl}_{FB}$, and hadronic cross section measurements.
2  ABBIENDI 2004G limits are from ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$ cross section at $\sqrt {s }$ = $130 - 207~$GeV.
3  BABICH 2003 obtain a bound $-0.175$ TeV${}^{-2}<1/\Lambda {}^{2}_{\mathit LL}$ $<0.095$ TeV${}^{-2}$ (95$\%$CL) in a model independent analysis allowing all of $\Lambda _{\mathit LL}$, $\Lambda _{\mathit LR}$, $\Lambda _{\mathit RL}$, $\Lambda _{\mathit RR}$ to coexist.
References:
 SCHAEL 2007A
EPJ C49 411 Fermion Pair Production in ${{\mathit e}^{+}}{{\mathit e}^{-}}$ Collisions at $189 - 209$ GeV and Constraints on Physics Beyond the Standard Model
 ABDALLAH 2006C
EPJ C45 589 Measurement and Interpretation of Fermion-Pair Production at LEP Energies above the ${{\mathit Z}}$ Resonance
 ABBIENDI 2004G
EPJ C33 173 Tests of the Standard Model and Constraints on New Physics from Measurements of Fermion Pair Production at 189 to 209 GeV at LEP
 BABICH 2003
EPJ C29 103 Model Independent Constraints on Contact Interactions from LEP-2 Data Analysis
 ACCIARRI 2000P
PL B489 81 Search for Manifestations of New Physics in Fermion Pair Production at LEP