T meson

{{Short description|Subatomic particle}}

{{Infobox particle

| name = T meson

| image =

| caption =

| num_types =

| composition = {{plainlist|

• {{SubatomicParticle|T0}}: {{SubatomicParticle|Top quark}}{{SubatomicParticle|Up antiquark}}
• {{SubatomicParticle|T+}}: {{SubatomicParticle|Top quark}}{{SubatomicParticle|Down antiquark}}
• {{SubatomicParticle|Strange T+}}: {{SubatomicParticle|Top quark}}{{SubatomicParticle|Strange antiquark}}
• {{SubatomicParticle|Charmed T0}}: {{SubatomicParticle|Top quark}}{{SubatomicParticle|Charm antiquark}}
• {{SubatomicParticle|Bottom T+}}: {{SubatomicParticle|Top quark}}{{SubatomicParticle|Bottom antiquark}}}}

| statistics = bosonic

| group = meson

| interaction = strong, weak, gravitational, electromagnetic

| antiparticle = {{plainlist|

• {{SubatomicParticle|T0}}: {{SubatomicParticle|antiT0}}
• {{SubatomicParticle|T+}}: {{SubatomicParticle|T-}}
• {{SubatomicParticle|Strange T+}}: {{SubatomicParticle|Strange T-}}
• {{SubatomicParticle|Charmed T0}}: {{SubatomicParticle|Charmed antiT0}}
• {{SubatomicParticle|Bottom T-}}: {{SubatomicParticle|Bottom T+}}}}

| status = hypothetical

| theorized =

| discovered =

| symbol = {{SubatomicParticle|T0}}, {{SubatomicParticle|T+}}, {{SubatomicParticle|Strange T+}}, {{SubatomicParticle|Charmed T0}}, {{SubatomicParticle|Bottom T+}}

| mass =

| mean_lifetime =

| decay_particle =

| electric_charge = {{SubatomicParticle|T0}}, {{SubatomicParticle|Charmed T0}}: 0 e
{{SubatomicParticle|T+}}, {{SubatomicParticle|Strange T+}}, {{SubatomicParticle|Bottom T+}}: +1 e

| spin =

| strangeness =

| charm =

| bottomness =

| topness = +1

| isospin = 0

| hypercharge =

| parity =

| c_parity =

}}

T mesons are hypothetical mesons composed of a top quark and one additional subatomic particle. The second subatomic particle can be either an up antiquark ({{Subatomic particle|T0}}), down antiquark ({{Subatomic particle|T+}}), strange antiquark ({{Subatomic particle|Strange T+}}), charm antiquark ({{Subatomic particle|Charmed T0}}) or bottom antiquark ({{Subatomic particle|Bottom T+}}).

{{cite journal

|author=C. Amsler|year=2008

|publisher=Particle Data Group

|title=Review of Particle Physics: Naming Scheme for Hadrons

|url=http://pdg.lbl.gov/2008/reviews/namingrpp.pdf

|journal= Physics Letters B

|volume=667

|issue=1 |page=1

|doi= 10.1016/j.physletb.2008.07.018

| bibcode=2008PhLB..667....1A

|display-authors=etal|hdl=1854/LU-685594

|s2cid=227119789

|hdl-access=free

}}

Because of the top quark's short lifetime, T mesons are not expected to be found in nature.{{cite journal|doi=10.1007/s100520050144|arxiv=hep-ph/9704261|title=Top mesons|first=N.|last=Fabiano|journal=European Physical Journal C|volume=2|pages=345–350|year=1998|issue=2 |bibcode=1998EPJC....2..345F |s2cid=17321939 }}

The combination of a top quark and top antiquark is not an open T meson, but rather a closed top-quark meson called toponium. Each T meson has an antiparticle that is composed of a top antiquark and an up ({{Subatomic particle|Antit0}}), down ({{Subatomic particle|T-}}), strange ({{Subatomic particle|Strange T-}}), charm quark ({{Subatomic particle|Charmed antiT0}}) or bottom quark ({{Subatomic particle|Bottom T-}}) respectively.