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fields and particles in particle physics
and in the standard model of particle physics:
matter field fermions (spinors, Dirac fields)
| flavors of fundamental fermions in the standard model of particle physics: | |||
|---|---|---|---|
| generation of fermions | 1st generation | 2nd generation | 3d generation |
| quarks () | |||
| up-type | up quark () | charm quark () | top quark () |
| down-type | down quark () | strange quark () | bottom quark () |
| leptons | |||
| charged | electron | muon | tauon |
| neutral | electron neutrino | muon neutrino | tau neutrino |
| bound states: | |||
| mesons | light mesons: pion () ρ-meson () ω-meson () f1-meson a1-meson | strange-mesons: ϕ-meson (), kaon, K*-meson (, ) eta-meson () charmed heavy mesons: D-meson (, , ) J/ψ-meson () | bottom heavy mesons: B-meson () ϒ-meson () |
| baryons | nucleons: proton neutron |
(also: antiparticles)
hadrons (bound states of the above quarks)
minimally extended supersymmetric standard model
bosinos:
dark matter candidates
Exotica
An exotic meson is a hadron of baryon number zero which however, in contrast to actual mesons, has Wigner classification given by an isospin and Lorentz-spin group representation which is not a direct summand of a tensor product of representations of that of a quark-pair.
Hence the existence of exotic mesons is not readily explained by the QCD-based constituent quark model of quantum hadrodynamics, where mesons are bound states of two quarks (and baryons of three).
Some exotic mesons may possibly be interpreted as tetraquarks
Review:
Th. Gutsche, Exotic Mesons (pdf)
Luciano Maiani, Alessandro Pilloni, GGI Lectures on Exotic Hadrons [arXiv:2207.05141
See also
Last revised on July 13, 2022 at 06:50:24. See the history of this page for a list of all contributions to it.