介子列表
介子列表 > 赝标介子

JP = 0-介子
| 粒子名稱 | 粒子 符号 | 反粒子 符号 | 夸克組成 | 静止质量 (MeV/c2) | IG | JPC | S | C | B' | 平均生命期 (s) | 通常衰變至  (>5%的衰變) |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| π介子 | π+  | π−  | u d  | 0139.57018 !7002139570180000000♠139.57018±0.00035 | 1− | 0− | 0 | 0 | 0 | -08.2 !6992260330000000000♠(2.6033±0.0005)×10−8 | μ+  + νμ  |
| π介子 | π0  | Self |  \mathrm {\tfrac {u{\bar {u}}-d{\bar {d}}}{\sqrt {2}}} \,[a] | 0134.9766 !7002134976599999999♠134.9766±0.0006 | 1− | 0−+ | 0 | 0 | 0 | -17 !6983851999999999999♠(8.52±0.18)×10−17 | γ  + γ  |
| η介子 | η  | Self |  \mathrm {\tfrac {u{\bar {u}}+d{\bar {d}}-2s{\bar {s}}}{\sqrt {6}}} \,[a] | 0547.862 !7002547861999999999♠547.862±0.018 | 0+ | 0−+ | 0 | 0 | 0 | -19 !6981501999999999999♠(5.02±0.19)×10−19[b] | γ  + γ  or   π0  + π0  + π0  or   π+  + π0  + π−  |
| η素介子 | η′ (958) | Self |  {\tfrac {\mathrm {u{\bar {u}}+d{\bar {d}}+s{\bar {s}}} }{\sqrt {3}}}\,[a] | 0957.78 !7002957780000000000♠957.78±0.06 | 0+ | 0−+ | 0 | 0 | 0 | -21 !6979331999999999999♠(3.32±0.15)×10−21[b] | π+   + π−  + η  or  (ρ0  + γ ) / (π+   + π−  + γ ) or  π0  + π0  + η  |
| η粲介子 | ηc (1S) | Self | c c  | 7003298360000000000♠2983.6±0.7 | 0+ | 0−+ | 0 | 0 | 0 | -23 !6977204000000000000♠(2.04±0.05)×10−23[b] | http://pdg.lbl.gov/2010/listings/rpp2010-list-eta-c-1S.pdf（页面存档备份，存于） |
| η底介子 | ηb (1S) | Self | b b  | 7003939800000000000♠9398.0±3.2 | 0+ | 0−+ | 0 | 0 | 0 | 未知 | http://pdg.lbl.gov/2014/listings/rpp2014-list-eta-b-1S.pdf（页面存档备份，存于） |
| K介子 | K+  | K−  | u s  | 0493.677 !7002493677000000000♠493.677±0.016 | 1⁄2 | 0− | 1 | 0 | 0 | -08.3 !6992123800000000000♠(1.2380±0.0021)×10−8 | μ+  + νμ  or  π+  + π0  or   π0  + e+  + νe  or  π+  + π+  + π−   |
| K介子 | K0  | K0  | d s  | 0497.614 !7002497614000000000♠497.614±0.024 | 1⁄2 | 0− | 1 | 0 | 0 | [c] | [c] |
| 短寿命K介子 | K0S  | Self |  \mathrm {\tfrac {d{\bar {s}}+s{\bar {d}}}{\sqrt {2}}} \,[e] | 0497.614 !7002497614000000000♠497.614±0.024[d] | 1⁄2 | 0− | (*) | 0 | 0 | -11 !6989895400000000000♠(8.954±0.004)×10−11 | π+  + π−  or  π0  + π0  |
| 长寿命K介子 | K0L  | Self |  \mathrm {\tfrac {d{\bar {s}}-s{\bar {d}}}{\sqrt {2}}} \,[e] | 0497.614 !7002497614000000000♠497.614±0.024[d] | 1⁄2 | 0− | (*) | 0 | 0 | -08.1 !6992511599999999999♠(5.116±0.021)×10−8 | π±  + e∓  + νe  or  π±  + μ∓  + νμ  or  π0  + π0  + π0  or   π+  + π0  + π−  |
| D介子 | D+  | D−  | c d  | 7003186961000000000♠1869.61±0.10 | 1⁄2 | 0− | 0 | +1 | 0 | -12.4 !6988104000000000000♠(1.040±0.007)×10−12 | http://pdg.lbl.gov/2014/listings/rpp2014-list-D-plus-minus.pdf（页面存档备份，存于） |
| D介子 | D0  | D0  | c u  | 7003186484000000000♠1864.84±0.07 | 1⁄2 | 0− | 0 | +1 | 0 | -13.3 !6987410100000000000♠(4.101±0.015)×10−13 | http://pdg.lbl.gov/2014/listings/rpp2014-list-D-zero.pdf（页面存档备份，存于） |
| 奇D介子 | D+s  | D−s  | c s  | 7003196830000000000♠1968.30±0.11 | 0 | 0− | +1 | +1 | 0 | -13.1 !6987500000000000000♠(5.00±0.07)×10−13 | http://pdg.lbl.gov/2014/listings/rpp2014-list-Ds-plus-minus.pdf（页面存档备份，存于） |
| B介子 | B+  | B−  | u b  | 7003527926000000000♠5279.26±0.17 | 1⁄2 | 0− | 0 | 0 | +1 | -12.1 !6988163800000000000♠(1.638±0.004)×10−12 | http://pdg.lbl.gov/2014/listings/rpp2014-list-B-plus-minus.pdf（页面存档备份，存于） |
| B介子 | B0  | B0  | d b  | 7003527958000000000♠5279.58±0.17 | 1⁄2 | 0− | 0 | 0 | +1 | -12.2 !6988151900000000000♠(1.519±0.009)×10−12 | http://pdg.lbl.gov/2014/listings/rpp2014-list-B-zero.pdf（页面存档备份，存于） |
| 奇B介子 | B0s  | B0s  | s b  | 7003536677000000000♠5366.77±0.24 | 0 | 0− | −1 | 0 | +1 | -12.3 !6988151200000000000♠(1.512±0.007)×10−12 | http://pdg.lbl.gov/2014/listings/rpp2014-list-Bs-zero.pdf（页面存档备份，存于） |
| 粲B介子 | B+c  | B−c  | c b  | 7003627560000000000♠6275.6±1.1 | 0 | 0− | 0 | +1 | +1 | -13.2 !6987452000000000000♠(4.52±0.33)×10−13 | http://pdg.lbl.gov/2014/listings/rpp2014-list-Bc-plus-minus.pdf（页面存档备份，存于） |
[a] ^  由于非零夸克质量而产生的补偿不精确。

[b] ^  此處根據粒子數據組（PDG）所給出的共振寬度（Γ）值，使用生命期τ = ħ/Γ 轉換求得。

[c] ^  强本征态，没有确定的寿命。

[d] ^  所给出的
K0
L与
K0
S的质量与
K0
相同，但已知
K0
L与
K0
S存在大约为6989220000000000000♠2.2×10−11 MeV/c2的质量差。

[e] ^ Weak eigenstate. Makeup is missing small CP–violating term (see notes on neutral kaons below).