Editing Meson (section)

=== Pseudoscalar mesons ===

{| class="wikitable sortable" style="text-align:center;"
|-
! class=unsortable | Particle name
! Particle <br/>symbol
! Antiparticle <br/>symbol
! class=unsortable | Quark <br/>content
! [[Rest mass]] ([[electron volt|MeV]]/[[speed of light|''c'']]<sup>2</sup>)
! width="50" | [[Isospin|I]]<sup>[[G parity|G]]</sup>
! width="50" | [[Total angular momentum|J]]<sup>[[Parity (physics)|P]][[C-parity|C]]</sup>
! width="50" | [[strangeness|S]]
! width="50" | [[charm (quantum number)|C]]
! width="50" | [[bottomness|B']]
! data-sort-type=number | [[Mean lifetime]] ([[second|s]])
! class=unsortable|Commonly decays to <br/>(>5% of decays)
|-
| Pion<ref name=PDGPion+->C. Amsler ''et al''. (2008): [http://pdg.lbl.gov/2008/listings/s008.pdf Particle listings – {{Subatomic particle|Pion+-}}]</ref>
| {{Subatomic particle|link=yes|Pion+}}
| {{Subatomic particle|link=yes|Pion-}}
| {{Subatomic particle|link=yes|Up quark}}{{Subatomic particle|link=yes|Down antiquark}}
| {{sort|0139.57018|{{val|139.57018|0.00035}}}}
| 1<sup>&minus;</sup>
| 0<sup>&minus;</sup>
| 0
| 0
| 0
| {{sort|-08.2|{{val|2.6033|0.0005|e=-8}}}}
| {{nowrap|{{Subatomic particle|link=yes|Antimuon}} + {{Subatomic particle|link=yes|Muon neutrino}}}}
|-
| Pion<ref name=PDGPion0>C. Amsler ''et al''. (2008): [http://pdg.lbl.gov/2008/listings/s009.pdf Particle listings – {{Subatomic particle|Pion0}}]</ref>
| {{Subatomic particle|link=yes|Pion0}}
| {{n/a|Self}}
| <math>\mathrm{\tfrac{u\bar{u} - d\bar{d}}{\sqrt{2}}}\,</math><sup>{{ref|quarkcontent|[a]}}</sup>
| {{sort|0134.9766|{{val|134.9766|0.0006}}}}
| 1<sup>&minus;</sup>
| 0<sup>&minus;+</sup>
| 0
| 0
| 0
| {{sort|-17|{{val|8.4|0.6|e=-17}}}}
| {{nowrap|{{Subatomic particle|link=yes|Photon}} + {{Subatomic particle|link=yes|Photon}}}}
|-
| Eta meson<ref name=PDGEta>C. Amsler ''et al''. (2008): [http://pdg.lbl.gov/2008/listings/s014.pdf Particle listings – {{Subatomic particle|Eta}}]</ref>
| {{Subatomic particle|link=yes|Eta}}
| {{n/a|Self}}
| {{nowrap|<math>\mathrm{\tfrac{u\bar{u} + d\bar{d} - 2s\bar{s}}{\sqrt{6}}}\,</math><sup>{{ref|quarkcontent|[a]}}</sup>}}
| {{sort|0547.853|{{val|547.853|0.024}}}}
| 0<sup>+</sup>
| 0<sup>&minus;+</sup>
| 0
| 0
| 0
| {{sort|-19|{{val|5.0|0.3|e=-19}}<sup>{{ref|Lifetime|[b]}}</sup>}}
| {{nowrap|{{Subatomic particle|link=yes|Photon}} + {{Subatomic particle|link=yes|Photon}}}} or <br>{{nowrap|{{Subatomic particle|link=yes|Pion0}} + {{Subatomic particle|link=yes|Pion0}} + {{Subatomic particle|link=yes|Pion0}} or}} <br>{{nowrap|{{Subatomic particle|link=yes|Pion+}} + {{Subatomic particle|link=yes|Pion0}} + {{Subatomic particle|link=yes|Pion-}}}}
|-
| Eta prime meson<ref name=PDGEtaPrime>C. Amsler ''et al''. (2008): [http://pdg.lbl.gov/2008/listings/m002.pdf Particle listings – {{Subatomic particle|Eta prime}}]</ref>
| {{Subatomic particle|link=yes|Eta prime}}(958)
| {{n/a|Self}}
| <math>\mathrm{\tfrac{u\bar{u} + d\bar{d} + s\bar{s}}{\sqrt{3}}}\,</math><sup>{{ref|quarkcontent|[a]}}</sup>
| {{sort|0957.66|{{val|957.66|0.24}}}}
| 0<sup>+</sup>
| 0<sup>&minus;+</sup>
| 0
| 0
| 0
| {{sort|-21|{{val|3.2|0.2|e=-21}}<sup>{{ref|Lifetime|[b]}}</sup>}}
| {{nowrap|{{Subatomic particle|link=yes|Pion+}}  + {{Subatomic particle|link=yes|Pion-}} + {{Subatomic particle|link=yes|Eta}} or}} <br>{{nowrap|({{Subatomic particle|link=yes|rho0}} + {{Subatomic particle|link=yes|Photon}}) / ({{Subatomic particle|link=yes|Pion+}}  + {{Subatomic particle|link=yes|Pion-}} + {{Subatomic particle|link=yes|Photon}}) or}} <br>{{nowrap|{{Subatomic particle|link=yes|Pion0}} + {{Subatomic particle|link=yes|Pion0}} + {{Subatomic particle|link=yes|Eta}}}}
|-
| Charmed eta meson<ref name=PDGCharmedEta>C. Amsler ''et al''. (2008): [http://pdg.lbl.gov/2008/listings/m026.pdf Particle listings – {{Subatomic particle|Charmed eta}}]</ref>
| {{Subatomic particle|link=yes|Charmed eta}}(1S)
| {{n/a|Self}}
| {{Subatomic particle|link=yes|charm quark}}{{Subatomic particle|link=yes|charm antiquark}}
| {{val|2980.3|1.2}}
| 0<sup>+</sup>
| 0<sup>&minus;+</sup>
| 0
| 0
| 0
| {{sort|-23|{{val|2.5|0.3|e=-23}}<sup>{{ref|Lifetime|[b]}}</sup>}}
| [http://pdg.lbl.gov/2008/listings/m026.pdf See {{Subatomic particle|Charmed eta}} decay modes]
|-
| Bottom eta meson<ref name=PDGBottomEta>C. Amsler ''et al''. (2008): [http://pdg.lbl.gov/2008/listings/m171.pdf Particle listings – {{Subatomic particle|Bottom eta}}]</ref>
| {{Subatomic particle|link=yes|Bottom eta}}(1S)
| {{n/a|Self}}
| {{Subatomic particle|link=yes|Bottom quark}}{{Subatomic particle|link=yes|Bottom antiquark}}
| {{val|9300|40}}
| <span style="color:red">0</span><sup><span style="color:red">+</span></sup>
| <span style="color:red">0</span><sup><span style="color:red">&minus;+</span></sup>
| 0
| 0
| 0
| Unknown
| [http://pdg.lbl.gov/2008/listings/m171.pdf See {{Subatomic particle|Bottom eta}} decay modes]
|-
| Kaon<ref name=PDGKaon+>C. Amsler ''et al''. (2008): [http://pdg.lbl.gov/2008/listings/s010.pdf Particle listings – {{Subatomic particle|Kaon+-}}]</ref>
| {{Subatomic particle|link=yes|Kaon+}}
| {{Subatomic particle|link=yes|Kaon-}}
| {{Subatomic particle|link=yes|Up quark}}{{Subatomic particle|link=yes|Strange antiquark}}
| {{sort|0493.677|{{val|493.677|0.016}}}}
| {{frac|1|2}}
| 0<sup>&minus;</sup>
| 1
| 0
| 0
| {{sort|-08.3|{{val|1.2380|0.0021|e=-8}}}}
| {{nowrap|{{Subatomic particle|link=yes|Antimuon}} + {{Subatomic particle|link=yes|Muon neutrino}} or}}<br>
{{nowrap|{{Subatomic particle|link=yes|pion+}} + {{Subatomic particle|link=yes|pion0}} or}} <br> {{nowrap|{{Subatomic particle|link=yes|Pion+}} + {{Subatomic particle|link=yes|Pion+}} + {{Subatomic particle|link=yes|Pion-}} or}} <br> {{nowrap|{{Subatomic particle|link=yes|pion0}} + {{Subatomic particle|link=yes|positron}} + {{Subatomic particle|link=yes|Electron neutrino}}}}
|-
| Kaon<ref name=PDGKaon0>C. Amsler ''et al''. (2008): [http://pdg.lbl.gov/2008/listings/s011.pdf Particle listings – {{Subatomic particle|Kaon0}}]</ref>
| {{Subatomic particle|link=yes|Kaon0}}
| {{Subatomic particle|link=yes|Antikaon0}}
| {{Subatomic particle|link=yes|Down quark}}{{Subatomic particle|link=yes|Strange antiquark}}
| {{sort|0497.614|{{val|497.614|0.024}}}}
| {{frac|1|2}}
| 0<sup>&minus;</sup>
| 1
| 0
| 0
| <sup>{{ref|strongforce|[c]}}</sup>
| <sup>{{ref|strongforce|[c]}}</sup>
|-
| K-Short<ref name=PDGK-short>C. Amsler ''et al''. (2008): [http://pdg.lbl.gov/2008/listings/s012.pdf Particle listings – {{Subatomic particle|K-short0}}]</ref>
| {{Subatomic particle|link=yes|K-short0}}
| {{n/a|Self}}
| <math>\mathrm{\tfrac{d\bar{s} + s\bar{d}}{\sqrt{2}}}\,</math><sup>{{ref|Kaon|[e]}}</sup>
| {{sort|0497.614|{{val|497.614|0.024}}}}<sup>{{ref|Kaonmass|[d]}}</sup>
| {{frac|1|2}}
| 0<sup>&minus;</sup>
| [[List of mesons#Notes on neutral kaons|(*)]]
| 0
| 0
| {{sort|-11|{{val|8.953|0.005|e=-11}}}}
| {{nowrap|{{Subatomic particle|link=yes|pion+}} + {{Subatomic particle|link=yes|pion-}} or}} <br>{{nowrap|{{Subatomic particle|link=yes|pion0}} + {{Subatomic particle|link=yes|pion0}}}}
|-
| K-Long<ref name=PDGK-long>C. Amsler ''et al''. (2008): [http://pdg.lbl.gov/2008/listings/s013.pdf Particle listings – {{Subatomic particle|k-long0}}]</ref>
| {{Subatomic particle|link=yes|K-long0}}
| {{n/a|Self}}
| <math>\mathrm{\tfrac{d\bar{s} - s\bar{d}}{\sqrt{2}}}\,</math><sup>{{ref|Kaon|[e]}}</sup>
| {{sort|0497.614|{{val|497.614|0.024}}}}<sup>{{ref|Kaonmass|[d]}}</sup>
| {{frac|1|2}}
| 0<sup>&minus;</sup>
| [[List of mesons#Notes on neutral kaons|(*)]]
| 0
| 0
| {{sort|-08.1|{{val|5.116|0.020|e=-8}}}}
| {{nowrap|{{Subatomic particle|link=yes|Pion+-}} + {{Subatomic particle|link=yes|electron-+}} + {{Subatomic particle|link=yes|Electron neutrino}} or}}<br> {{nowrap|{{Subatomic particle|link=yes|Pion+-}} + {{Subatomic particle|link=yes|muon-+}} + {{Subatomic particle|link=yes|Muon neutrino}} or}} <br>{{nowrap|{{Subatomic particle|link=yes|Pion0}} + {{Subatomic particle|link=yes|Pion0}} + {{Subatomic particle|link=yes|Pion0}} or}} <br>{{nowrap|{{Subatomic particle|link=yes|Pion+}} + {{Subatomic particle|link=yes|Pion0}} + {{Subatomic particle|link=yes|Pion-}}}}
|-
| D meson<ref name=PDGD+>C. Amsler ''et al''. (2008): [http://pdg.lbl.gov/2008/listings/s031.pdf Particle listings – {{Subatomic particle|D+-}}]</ref>
| {{Subatomic particle|link=yes|D+}}
| {{Subatomic particle|link=yes|D-}}
| {{Subatomic particle|link=yes|Charm quark}}{{Subatomic particle|link=yes|Down antiquark}}
| {{val|1869.62|0.20}}
| {{frac|1|2}}
| 0<sup>&minus;</sup>
| 0
| +1
| 0
| {{sort|-12.4|{{val|1.040|0.007|e=-12}}}}
| [http://pdg.lbl.gov/2008/listings/s031.pdf See {{Subatomic particle|D+}} decay modes]
|-
| D meson<ref name=PDGD0>C. Amsler ''et al''. (2008): [http://pdg.lbl.gov/2008/listings/s032.pdf Particle listings – {{Subatomic particle|D0}}]</ref>
| {{Subatomic particle|link=yes|D0}}
| {{Subatomic particle|link=yes|AntiD0}}
| {{Subatomic particle|link=yes|Charm quark}}{{Subatomic particle|link=yes|up antiquark}}
| {{val|1864.84|0.17}}
| {{frac|1|2}}
| 0<sup>&minus;</sup>
| 0
| +1
| 0
| {{sort|-13.3|{{val|4.101|0.015|e=-13}}}}
| [http://pdg.lbl.gov/2008/listings/s032.pdf See {{Subatomic particle|D0}} decay modes]
|-
| strange D meson<ref name=PDGDs>C. Amsler ''et al''. (2008): [http://pdg.lbl.gov/2008/listings/s034.pdf Particle listings – {{Subatomic particle|Strange D+-}}]</ref>
| {{Subatomic particle|link=yes|Strange D+}}
| {{Subatomic particle|link=yes|Strange D-}}
| {{Subatomic particle|link=yes|Charm quark}}{{Subatomic particle|link=yes|strange antiquark}}
| {{val|1968.49|0.34}}
| 0
| 0<sup>&minus;</sup>
| +1
| +1
| 0
| {{sort|-13.1|{{val|5.00|0.07|e=-13}}}}
| [http://pdg.lbl.gov/2008/listings/s034.pdf See {{Subatomic particle|Strange D+}} decay modes]
|-
| B meson<ref name=PDGB+>C. Amsler ''et al''. (2008): [http://pdg.lbl.gov/2008/listings/s041.pdf Particle listings – {{Subatomic particle|B+-}}]</ref>
| {{Subatomic particle|link=yes|B+}}
| {{Subatomic particle|link=yes|B-}}
| {{Subatomic particle|link=yes|up quark}}{{Subatomic particle|link=yes|bottom antiquark}}
| {{val|5279.15|0.31}}
| <span style="color:red">{{frac|1|2}}</span>
| <span style="color:red">0</span><sup><span style="color:red">&minus;</span></sup>
| 0
| 0
| +1
| {{sort|-12.1|{{val|1.638|0.011|e=-12}}}}
| [http://pdg.lbl.gov/2008/listings/s041.pdf See {{Subatomic particle|B+}} decay modes]
|-
| B meson<ref name=PDGB0>C. Amsler ''et al''. (2008): [http://pdg.lbl.gov/2008/listings/s042.pdf Particle listings – {{Subatomic particle|B0}}]</ref>
| {{Subatomic particle|link=yes|B0}}
| {{Subatomic particle|link=yes|AntiB0}}
| {{Subatomic particle|link=yes|Down quark}}{{Subatomic particle|link=yes|Bottom antiquark}}
| {{val|5279.53|33}}
| <span style="color:red">{{frac|1|2}}</span>
| <span style="color:red">0</span><sup><span style="color:red">&minus;</span></sup>
| 0
| 0
| +1
| {{sort|-12.2|{{val|1.530|0.009|e=-12}}}}
| [http://pdg.lbl.gov/2008/listings/s042.pdf See {{Subatomic particle|B0}} decay modes]
|-
| Strange B meson<ref name=PDGBs>C. Amsler ''et al''. (2008): [http://pdg.lbl.gov/2008/listings/s086.pdf Particle listings – {{Subatomic particle|Strange B0}}]</ref>
| {{Subatomic particle|link=yes|Strange B0}}
| {{Subatomic particle|link=yes|Strange AntiB0}}
| {{Subatomic particle|link=yes|strange quark}}{{Subatomic particle|link=yes|Bottom antiquark}}
| {{val|5366.3|0.6}}
| <span style="color:red">0</span>
| <span style="color:red">0</span><sup><span style="color:red">&minus;</span></sup>
| &minus;1
| 0
| +1
| {{sort|-12.3|{{val|1.470|+0.026|-0.027|e=-12}}}}
| [http://pdg.lbl.gov/2008/listings/s086.pdf See {{Subatomic particle|Strange B0}} decay modes]
|-
| Charmed B meson<ref name=PDGBc>C. Amsler ''et al''. (2008): [http://pdg.lbl.gov/2008/listings/s091.pdf Particle listings – {{Subatomic particle|Charmed B+-}}]</ref>
| {{Subatomic particle|link=yes|Charmed B+}}
| {{Subatomic particle|link=yes|Charmed B-}}
| {{Subatomic particle|link=yes|Charm quark}}{{Subatomic particle|link=yes|bottom antiquark}}
| {{val|6276|4}}
| <span style="color:red">0</span>
| <span style="color:red">0</span><sup><span style="color:red">&minus;</span></sup>
| 0
| +1
| +1
| {{sort|-13.2|{{val|4.6|0.7|e=-13}}}}
| style="text-align:center;" | [http://pdg.lbl.gov/2008/listings/s091.pdf See {{Subatomic particle|Charmed B+}} decay modes]
|}
<sup>[a]</sup> {{note|quarkcontent}} Makeup inexact due to non-zero quark masses.<br>
<sup>[b]</sup> {{note|Lifetime}} PDG reports the [[resonance width]] (Γ). Here the conversion τ&nbsp;=&nbsp;{{frac|ħ|&Gamma;}} is given instead.<br>
<sup>[c]</sup> {{note|strongforce}}[[Strong force|Strong]] [[eigenstate]]. No definite lifetime (see [[List of mesons#Notes on neutral kaons|kaon notes]] below)<br>
<sup>[d]</sup> {{note|Kaonmass}} The mass of the {{Subatomic particle|K-long0}} and {{Subatomic particle|K-short0}} are given as that of the {{Subatomic particle|Kaon0}}. However, it is known that a difference between the masses of the {{Subatomic particle|K-long0}} and {{Subatomic particle|K-short0}} on the order of {{val|2.2|e=-11|u=MeV/c2}} exists.<ref name=PDGK-long/><br>
<sup>[e]</sup> {{note|Kaon}}[[Weak force|Weak]] [[eigenstate]]. Makeup is missing small [[CP violation|CP–violating]] term (see [[List of mesons#Notes on neutral kaons|notes on neutral kaons]] below).