pdgLive

GAUGE AND HIGGS BOSONS

INSPIRE JSON (beta) PDGID:

${{\mathit W}}$

$J$ = $1$

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 ^[1]

$80.377 \pm0.012$ GeV

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

$0.88145 \pm0.00013$

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

$10.811 \pm0.012$ 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 ${{\mathit W}}$ 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 ${{\mathit W}}/{{\mathit Z}}$ 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$_{T,i}/\Lambda {}^{4}$

${{\mathit W}^{+}}$ DECAY MODES

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

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

$(10.86\pm{0.09})\%$

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

$(10.71\pm{0.16})\%$

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

$(10.63\pm{0.15})\%$

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

$(11.38\pm{0.21})\%$

$(67.41\pm{0.27})\%$

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

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

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

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

${{\mathit c}}$ X

$(33.3\pm{2.6})\%$

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

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

$(1.4\pm{2.9})\%$

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

$<1.01\times 10^{-6}$

FOOTNOTES

Except where otherwise noted, content of the 2023 Review of Particle Physics is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license. The publication of the Review of Particle Physics is supported by US DOE, MEXT (Japan), INFN (Italy), JPS and CERN. Individual collaborators receive support for their PDG activities from their respective institutes or funding agencies. © 2023. See LBNL disclaimers.