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GAUGE AND HIGGS BOSONS

INSPIRE JSON 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)

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${{\mathit W}}$ MASS ^[1]

$80.3692$ $\pm0.0133$ GeV

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

$0.88136$ $\pm0.00015$

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

$10.818$ $\pm0.013$ GeV

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

$-0.029$ $\pm0.028$ GeV

${{\mathit W}}$ WIDTH

$2.14$ $\pm0.05$ GeV (S = 1.7)

▸ AVERAGE PARTICLE MULTIPLICITIES IN HADRONIC ${{\mathit W}}$ DECAY

▸ TRIPLE GAUGE COUPLINGS (TGC'S)

${{\mathit W}}$ 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

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

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

Mode

Fraction ($\Gamma_i$ / $\Gamma$)

Scale Factor/
Conf. Level

P(MeV/c)

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

($10.86$ $\pm0.09$ ) $\%$

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

($10.71$ $\pm0.16$ ) $\%$

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

($10.63$ $\pm0.15$ ) $\%$

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

($11.38$ $\pm0.21$ ) $\%$

($67.41$ $\pm0.27$ ) $\%$

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

$<1.9$ $\times 10^{-6}$

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

$<5.2$ $\times 10^{-6}$

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

$<1.7$ $\times 10^{-6}$

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

$<6$ $\times 10^{-4}$

${{\mathit c}}$ X

($33.3$ $\pm2.6$ ) $\%$

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

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

($1.4$ $\pm2.8$ ) $\%$

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

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

[1]	This value does not include the AALTONEN 2022 measurement by CDF. See the ${{\mathit W}}$ mass section in the listings for details.
[2]	${{\mathit \ell}}$ indicates each type of lepton (${{\mathit e}}$, ${{\mathit \mu}}$, and ${{\mathit \tau}}$), not sum over them.
[3]	This represents the width for the decay of the ${{\mathit W}}~$boson into a charged particle with momentum below detectability, p$<200$ MeV.

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