TRIPLE GAUGE COUPLINGS (TGC'S)

${{\widetilde{\mathit \kappa}}}_{{{\mathit Z}}}$

INSPIRE   JSON  (beta) PDGID:
S043KAZ
This coupling is $\mathit CP$-violating ($\mathit C$-conserving and $\mathit P$-violating).
VALUE EVTS DOCUMENT ID TECN  COMMENT
$\bf{ -0.12 {}^{+0.06}_{-0.04}}$ OUR AVERAGE
$-0.09$ ${}^{+0.08}_{-0.05}$ 1880 1
ABDALLAH
2008C
 DLPH ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $189 - 209$ GeV
$-0.20$ ${}^{+0.10}_{-0.07}$ 1065 2
ABBIENDI
2001H
 OPAL ${\it{}E}^{\it{}ee}_{\rm{}cm}$= 189 GeV
• • We do not use the following data for averages, fits, limits, etc. • •
3
AABOUD
2017S
 ATLS ${\it{}E}^{\it{}pp}_{\rm{}cm}$ = 7+8 TeV
4
BLINOV
2011
LEP ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $183 - 207$ GeV
1  ABDALLAH 2008C determine this triple gauge coupling from the measurement of the spin density matrix elements in ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit W}^{+}}{{\mathit W}^{-}}$ $\rightarrow$ ( ${{\mathit q}}{{\mathit q}}$) ( ${{\mathit \ell}}{{\mathit \nu}}$), where ${{\mathit \ell}}$ = ${{\mathit e}}$ or ${{\mathit \mu}}$. Values of all other couplings are fixed to their standard model values.
2  ABBIENDI 2001H study ${{\mathit W}}$-pair events, with one leptonically and one hadronically decaying ${{\mathit W}}$. The coupling is extracted using information from the ${{\mathit W}}$ production angle together with decay angles from the leptonically decaying ${{\mathit W}}$.
3  AABOUD 2017S analyze electroweak production of a ${{\mathit W}}$ boson in association with two jets at high dijet invariant mass, with the ${{\mathit W}}$ boson decaying to electron or muon plus neutrino. In the signal region of dijet mass larger than 1 TeV and leading-jet transverse momentum larger than 600 GeV, 30 events are observed in the data with $39$ $\pm4$ events expected in the Standard Model, yielding the following limit at 95$\%$ CL for the form factor cut-off scale ${{\mathit \Lambda}_{{{FF}}}}\rightarrow\infty{}$: $-0.56$ $<{{\widetilde{\mathit \kappa}}_{{{Z}}}}<$ $0.56$.
4  BLINOV 2011 use the LEP-average ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit W}^{+}}{{\mathit W}^{-}}$ cross section data for $\sqrt {s }$ = $183 - 207$ GeV to determine an upper limit on the TGC ${{\widetilde{\mathit \kappa}}_{{{Z}}}}$. The average values of the cross sections as well as their correlation matrix, and standard model expectations of the cross sections are taken from the LEPEWWG note hep-ex/0612034. At 95$\%$ confidence level $\vert {{\widetilde{\mathit \kappa}}_{{{Z}}}}\vert $ $<$ 0.13.
References