Meson Spin Composition Calculated mass without binding energy (MeV) Calculated mass with binding energy (MeV) Observed mass (MeV) % difference pion (π±) 0 2g* ? e as ud̅ 139.540 139.570 −0.02 pion (π0) 0 (upu̅p + dpd̅p)/2 140.562 134.982 134.977 0.004 charged rho meson (ρ+) 1 uvd̅v 797.11 774.07 775.11 −0.13 omegameson (ω) 1 uvd̅v 797.11 785.59 782.65 0.32 eta meson (η) 0 (upu̅p + dpd̅p + sps̅p)/2 563.949 548.663 547.862 0.15 eta prime meson (η’) 0 (upu̅p + dpd̅p)/2 + sps̅p 987.34 956.76 957.78 −0.11 kaon (K+) 0 7(g* + e) as ups̅p 493.754 493.677 0.02 kaon (K0) 0 7(g* + 2e) as dps̅p 497.331 497.614 −0.06 kaon (K*+) 1 uvs̅v 937.7 891.60 891.66 −0.007 phi meson (ϕ) 1 svs̅v 1078.1 1018.9 1019.5 −0.06 D meson (D*0) 1 cvu̅v 2004.0 2007.0 −0.15 strange D meson ( ${\text{D}}_{\text{s}}^{+}$ ) 0 0 e + 20(3g*/2) − 2g* (cps̅p) 1961.2 (1958.7) 1968.3 −0.36 strange D meson ( ${\text{D}}_{\text{s}}^{\ast +}$ ) 1 1 e + 20(3g*/2) (cvs̅v) 2101.3 (2144.4) 2112.1 −0.52 charmed eta meson (ηc) 0 0 2e + 30(3g*/2) ? 2g* (cpc̅p) 3012.1 (3070.6) 2983.6 0.95 J/Psi 1 1 2e + 30 (3g*/2) ? g* (cvc̅v) 3082.1 (3210.6) 3096.9 −0.48 D meson (D0) 0 cpu̅v ? g* 1863.9 1864.8 −0.05 D meson (D*0) 1 cvu̅v 2003.8 2010.3 −0.32 B meson ( ${\text{B}}_{\text{d}}^{0}$ ) 0 dvb̅p 5303.1 5279.6 0.44 B meson ( ${\text{B}}_{\text{d}}^{\ast 0}$ ) 1 dvb̅v 5373.1 5325.2 0.89 B meson (Bc) 0 0 e + 60(3g*/2) (cpb̅p) 6302.8 (6440.0) 6275.6 0.41 bottom eta meson (ηb) 0 0 2e + 90(3g*/2) ? g* (bpb̅p) 9384.4 (9809.3) 9398.0 −0.14 upsilon meson (γ) 1 1 2e + 90(3g*/2) (bvb̅v) 9454.4 (9949.4) 9460.3 −0.06 top-bottom quark-antiquark composite 0 bpb̅p + (bpb̅p + tpt̅p)/2 27.9 GeV 28 GeV −0.3 pseudoscalartop quark-antiquark (absent) 0 tpt̅p 26.4 GeV not observed t quark ½ t7 + t8 175.4 GeV 172.4 GeV 1.71 perturbative Higgs boson (absent) 0 W+W−Z0 252 GeV not observed low Higgs bosoniHh 0 W+W−Z0/2 126 GeV 125 GeV 0.79 high Higgs boson 0 3W+W−Z0 756 GeV 750 GeV 0.8