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GAUGE AND HIGGS BOSONS

${{\boldsymbol W}}$ $J$ = $1$

See related reviews:
Mass and Width of the ${{\mathit W}}$ Boson

Extraction of Triple Gauge Couplings (TGC's)

Anomalous ${{\mathit W}}/{{\mathit Z}}$ Quartic Couplings (QGCs)

${{\mathit W}}$ MASS

$80.379 \pm0.012$ GeV

${{\mathit W}}/{{\mathit Z}}$ MASS RATIO

$0.88153 \pm0.00017$

${\mathit m}_{{{\mathit Z}}}–{\mathit m}_{{{\mathit W}}}$

$10.803 \pm0.015$ GeV

${\mathit m}_{{{\mathit W}^{+}}}–{\mathit m}_{{{\mathit W}^{-}}}$

$-0.029 \pm0.028$ GeV

${{\mathit W}}$ WIDTH

$2.085 \pm0.042$ GeV

AVERAGE PARTICLE MULTIPLICITIES IN HADRONIC ${{\boldsymbol W}}$ DECAY

$\langle{}\mathit N_{{{\mathit \pi}^{\pm}}}\rangle{}$

$15.70 \pm0.35$

$\langle{}\mathit N_{{{\mathit K}^{\pm}}}\rangle{}$

$\langle{}\mathit N_{{{\mathit p}}}\rangle{}$

$\langle{}\mathit N_{{\mathrm {charged}}}\rangle{}$

$19.39 \pm0.08$

TRIPLE GAUGE COUPLINGS (TGC'S)

$\mathit g{}^{{{\mathit Z}}}_{1}$

$0.984 {}^{+0.018}_{-0.020}$

$\kappa _{{{\mathit \gamma}}}$

$0.982 \pm0.042$

$\lambda _{{{\mathit \gamma}}}$

$-0.022 \pm0.019$

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

$\lambda _{{{\mathit Z}}}$

$-0.09 \pm0.06$

$\mathit g{}^{{{\mathit Z}}}_{5}$

$-0.07 \pm0.09$ (S = 1.1)

$\mathit g{}^{{{\mathit Z}}}_{4}$

$-0.30 \pm0.17$

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

$-0.12 {}^{+0.06}_{-0.04}$

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

$-0.09 \pm0.07$

${{\mathit W}}$ ANOMALOUS MAGNETIC MOMENT

$2.22 \pm0.20$ ${{\mathit e}}/2{\mathit m}_{{{\mathit W}}}$

${{\mathit c}_{{{WWW}}}}/\Lambda {}^{2}$, ${{\mathit c}_{{{W}}}}/\Lambda {}^{2}$, ${{\mathit c}_{{{B}}}}/\Lambda {}^{2}$

ANOMALOUS ${{\boldsymbol W}}/{{\boldsymbol Z}}$ QUARTIC COUPLINGS

${{\mathit a}_{{0}}}/\Lambda {}^{2}$, ${{\mathit a}_{{c}}}/\Lambda {}^{2}$, ${{\mathit a}_{{n}}}/\Lambda {}^{2}$, ${{\mathit \kappa}_{{0}}^{W}}/\Lambda {}^{2}$, ${{\mathit \kappa}_{{c}}^{W}}/\Lambda {}^{2}$, ${{\mathit f}}_{T,0}/\Lambda {}^{4}$, ${{\mathit f}}_{M,i}/\Lambda {}^{4}$, ${{\mathit \alpha}_{{4}}}$, ${{\mathit \alpha}_{{5}}}$, F$_{S,i}/\Lambda {}^{4}$, F$_{M,i}/\Lambda {}^{4}$, F$_{T,i}/\Lambda {}^{4}$

Decay Modes

${{\mathit W}^{-}}$ modes are charge conjugates of the modes below.

${{\mathit \ell}^{+}}{{\mathit \nu}}$

$(10.86\pm0.09)\%$

${{\mathit e}^{+}}{{\mathit \nu}}$

$(10.71\pm0.16)\%$

${{\mathit \mu}^{+}}{{\mathit \nu}}$

$(10.63\pm0.15)\%$

${{\mathit \tau}^{+}}{{\mathit \nu}}$

$(11.38\pm0.21)\%$

$(67.41\pm0.27)\%$

${{\mathit \pi}^{+}}{{\mathit \gamma}}$

$<7\times 10^{-6}$

${{\mathit D}_{{s}}^{+}}{{\mathit \gamma}}$

$<1.3\times 10^{-3}$

${{\mathit c}}$ X

$(33.3\pm2.6)\%$

${{\mathit c}}{{\overline{\mathit s}}}$

$(31^{+13}_{-11})\%$

$(1.4\pm2.9)\%$