GAUGE AND HIGGS BOSONS

#### ${{\mathit Z}}$

$J$ = $1$
 See related reviews: ${{\mathit Z}}$ Boson Anomalous ${{\mathit Z}}{{\mathit Z}}{{\mathit \gamma}}$ , ${{\mathit Z}}{{\mathit \gamma}}{{\mathit \gamma}}$ , and ${{\mathit Z}}{{\mathit Z}}{{\mathit V}}$ Couplings Anomalous ${{\mathit W}}$ /${{\mathit Z}}$ Quartic Couplings (QGCs)
 ${{\mathit Z}}$ MASS $91.1876 \pm0.0021$ GeV
 ${{\mathit Z}}$ WIDTH $2.4952 \pm0.0023$ GeV
 ${{\mathit Z}}$ HADRONIC POLE CROSS SECTION $41.541 \pm0.037$ nb
 CHARGE ASYMMETRY IN ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit q}}{{\overline{\mathit q}}}$
 CHARGE ASYMMETRY IN ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit Z}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$
ANOMALOUS ${{\mathit W}}$ /${{\mathit Z}}$ QUARTIC COUPLINGS
 $\mathit a_{0}/\Lambda {}^{2}$, $\mathit a_{{{\mathit c}} }/\Lambda {}^{2}$
 $\Gamma_{1}$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$ [1] $(3.3632 \pm{0.0042 )\%}$ 45594
 $\Gamma_{2}$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ [1] $(3.3662 \pm{0.0066 )\%}$ 45594
 $\Gamma_{3}$ ${{\mathit \tau}^{+}}{{\mathit \tau}^{-}}$ [1] $(3.3696 \pm{0.0083 )\%}$ 45559
 $\Gamma_{4}$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$ [2][1] $(3.3658 \pm{0.0023 )\%}$
 $\Gamma_{5}$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ 45593
 $\Gamma_{6}$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}{{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$ [3] $(4.55\pm{0.17})\times 10^{-6}$ 45594
 $\Gamma_{7}$ invisible [1] $(20.000 \pm{0.055 )\%}$
 $\Gamma_{8}$ hadrons [1] $(69.911 \pm{0.056 )\%}$
 $\Gamma_{9}$ (${\mathit {\mathit u}}$ ${\mathit {\overline{\mathit u}}}$ + ${\mathit {\mathit c}}$ ${\mathit {\overline{\mathit c}}}$)/2 $(11.6\pm{0.6})\%$
 $\Gamma_{10}$ (${\mathit {\mathit d}}$ ${\mathit {\overline{\mathit d}}}$ + ${\mathit {\mathit s}}$ ${\mathit {\overline{\mathit s}}}$ + ${\mathit {\mathit b}}$ ${\mathit {\overline{\mathit b}}}$)/3 $(15.6\pm{0.4})\%$
 $\Gamma_{11}$ ${\mathit {\mathit c}}$ ${\mathit {\overline{\mathit c}}}$ $(12.03\pm{0.21})\%$
 $\Gamma_{12}$ ${\mathit {\mathit b}}$ ${\mathit {\overline{\mathit b}}}$ $(15.12\pm{0.05})\%$
 $\Gamma_{13}$ ${{\mathit b}}{{\overline{\mathit b}}}{{\mathit b}}{{\overline{\mathit b}}}$ $(3.6\pm{1.3})\times 10^{-4}$
 $\Gamma_{14}$ ${{\mathit g}}{{\mathit g}}{{\mathit g}}$ $<1.1\%$ CL=95%
 $\Gamma_{15}$ ${{\mathit \pi}^{0}}{{\mathit \gamma}}$ $<2.01\times 10^{-5}$ CL=95% 45594
 $\Gamma_{16}$ ${{\mathit \eta}}{{\mathit \gamma}}$ $<5.1\times 10^{-5}$ CL=95% 45592
 $\Gamma_{17}$ ${{\mathit \rho}^{0}}{{\mathit \gamma}}$ $<2.5\times 10^{-5}$ CL=95% 45591
 $\Gamma_{18}$ ${{\mathit \omega}}{{\mathit \gamma}}$ $<6.5\times 10^{-4}$ CL=95% 45590
 $\Gamma_{19}$ ${{\mathit \eta}^{\,'}{(958)}}{{\mathit \gamma}}$ $<4.2\times 10^{-5}$ CL=95% 45589
 $\Gamma_{20}$ ${{\mathit \phi}}{{\mathit \gamma}}$ $<9\times 10^{-7}$ CL=95% 45588
 $\Gamma_{21}$ ${{\mathit \gamma}}{{\mathit \gamma}}$ $<1.46\times 10^{-5}$ CL=95% 45594
 $\Gamma_{22}$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ $<1.52\times 10^{-5}$ CL=95% 45594
 $\Gamma_{23}$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \gamma}}$ $<2.2\times 10^{-6}$ CL=95% 45594
 $\Gamma_{24}$ ${{\mathit \pi}^{\pm}}{{\mathit W}^{\mp}}$ [4] $<7\times 10^{-5}$ CL=95% 10167
 $\Gamma_{25}$ ${{\mathit \rho}^{\pm}}{{\mathit W}^{\mp}}$ [4] $<8.3\times 10^{-5}$ CL=95% 10142
 $\Gamma_{26}$ ${{\mathit J / \psi}{(1S)}}$ X $(3.51^{+0.23}_{-0.25})\times 10^{-3}$ S=1.1
 $\Gamma_{27}$ ${{\mathit J / \psi}{(1S)}}{{\mathit \gamma}}$ $<1.4\times 10^{-6}$ CL=95% 45541
 $\Gamma_{28}$ ${{\mathit \psi}{(2S)}}$ X $(1.60\pm{0.29})\times 10^{-3}$
 $\Gamma_{29}$ ${{\mathit \psi}{(2S)}}{{\mathit \gamma}}$ $<4.5\times 10^{-6}$ CL=95% 45519
 $\Gamma_{30}$ ${{\mathit J / \psi}{(1S)}}{{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$ 45541
 $\Gamma_{31}$ ${{\mathit J / \psi}{(1S)}}{{\mathit J / \psi}{(1S)}}$ $<2.2\times 10^{-6}$ CL=95% 45489
 $\Gamma_{32}$ ${{\mathit \chi}_{{c1}}{(1P)}}$ X $(2.9\pm{0.7})\times 10^{-3}$
 $\Gamma_{33}$ ${{\mathit \chi}_{{c2}}{(1P)}}$ X $<3.2\times 10^{-3}$ CL=90%
 $\Gamma_{34}$ ${{\mathit \Upsilon}{(1S)}}$ X +${{\mathit \Upsilon}{(2S)}}$ X +${{\mathit \Upsilon}{(3S)}}$ X $(1.0\pm{0.5})\times 10^{-4}$
 $\Gamma_{35}$ ${{\mathit \Upsilon}{(1S)}}$ X $<4.4\times 10^{-5}$ CL=95%
 $\Gamma_{36}$ ${{\mathit \Upsilon}{(1S)}}{{\mathit \gamma}}$ $<2.8\times 10^{-6}$ CL=95% 45103
 $\Gamma_{37}$ ${{\mathit \Upsilon}{(2S)}}$ X $<1.39\times 10^{-4}$ CL=95%
 $\Gamma_{38}$ ${{\mathit \Upsilon}{(2S)}}{{\mathit \gamma}}$ $<1.7\times 10^{-6}$ CL=95% 45043
 $\Gamma_{39}$ ${{\mathit \Upsilon}{(3S)}}$ X $<9.4\times 10^{-5}$ CL=95%
 $\Gamma_{40}$ ${{\mathit \Upsilon}{(3S)}}{{\mathit \gamma}}$ $<4.8\times 10^{-6}$ CL=95% 45006
 $\Gamma_{41}$ ${{\mathit \Upsilon}{(1,2,3S)}}{{\mathit \Upsilon}{(1,2,3S)}}$ $<1.5\times 10^{-6}$ CL=95%
 $\Gamma_{42}$ ( ${{\mathit D}^{0}}$ /${{\overline{\mathit D}}^{0}}$) X $(20.7\pm{2.0})\%$
 $\Gamma_{43}$ ${{\mathit D}^{\pm}}$ X $(12.2\pm{1.7})\%$
 $\Gamma_{44}$ ${{\mathit D}^{*}{(2010)}^{\pm}}$ X [4] $(11.4\pm{1.3})\%$
 $\Gamma_{45}$ ${{\mathit D}_{{s1}}{(2536)}^{\pm}}$ X $(3.6\pm{0.8})\times 10^{-3}$
 $\Gamma_{46}$ ${{\mathit D}_{{sJ}}{(2573)}^{\pm}}$ X $(5.8\pm{2.2})\times 10^{-3}$
 $\Gamma_{47}$ ${{\mathit D}^{*'}{(2629)}^{\pm}}$ X searched for
 $\Gamma_{48}$ ${{\mathit B}}$ X
 $\Gamma_{49}$ ${{\mathit B}^{*}}$ X
 $\Gamma_{50}$ ${{\mathit B}^{+}}$ X [5] $(6.08\pm{0.13})\%$
 $\Gamma_{51}$ ${{\mathit B}_{{s}}^{0}}$ X [5] $(1.59\pm{0.13})\%$
 $\Gamma_{52}$ ${{\mathit B}_{{c}}^{+}}$ X searched for
 $\Gamma_{53}$ ${{\mathit \Lambda}_{{c}}^{+}}$ X $(1.54\pm{0.33})\%$
 $\Gamma_{54}$ ${{\mathit \Xi}_{{c}}^{0}}$ X seen
 $\Gamma_{55}$ ${{\mathit \Xi}_{{b}}}$ X seen
 $\Gamma_{56}$ ${{\mathit b}}$ -baryon X [5] $(1.38\pm{0.22})\%$
 $\Gamma_{57}$ anomalous ${{\mathit \gamma}}$ + hadrons [6] $<3.2\times 10^{-3}$ CL=95%
 $\Gamma_{58}$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \gamma}}$ [6] $<5.2\times 10^{-4}$ CL=95% 45594
 $\Gamma_{59}$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}{{\mathit \gamma}}$ [6] $<5.6\times 10^{-4}$ CL=95% 45594
 $\Gamma_{60}$ ${{\mathit \tau}^{+}}{{\mathit \tau}^{-}}{{\mathit \gamma}}$ [6] $<7.3\times 10^{-4}$ CL=95% 45559
 $\Gamma_{61}$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}{{\mathit \gamma}}{{\mathit \gamma}}$ [7] $<6.8\times 10^{-6}$ CL=95%
 $\Gamma_{62}$ ${{\mathit q}}{{\overline{\mathit q}}}{{\mathit \gamma}}{{\mathit \gamma}}$ [7] $<5.5\times 10^{-6}$ CL=95%
 $\Gamma_{63}$ ${{\mathit \nu}}{{\overline{\mathit \nu}}}{{\mathit \gamma}}{{\mathit \gamma}}$ [7] $<3.1\times 10^{-6}$ CL=95% 45594
 $\Gamma_{64}$ ${{\mathit e}^{\pm}}{{\mathit \mu}^{\mp}}$ LF [4] $<7.5\times 10^{-7}$ CL=95% 45594
 $\Gamma_{65}$ ${{\mathit e}^{\pm}}{{\mathit \tau}^{\mp}}$ LF [4] $<5.0\times 10^{-6}$ CL=95% 45576
 $\Gamma_{66}$ ${{\mathit \mu}^{\pm}}{{\mathit \tau}^{\mp}}$ LF [4] $<6.5\times 10^{-6}$ CL=95% 45576
 $\Gamma_{67}$ ${{\mathit p}}{{\mathit e}}$ B, L $<1.8\times 10^{-6}$ CL=95% 45589
 $\Gamma_{68}$ ${{\mathit p}}{{\mathit \mu}}$ B, L $<1.8\times 10^{-6}$ CL=95% 45589
 FOOTNOTES