The theta meson ( θ ) is a hypothetical form of quarkonium (i.e. a flavourless meson) formed by a top quark ( t ) and top antiquark ( t ). As a P-odd and...

particle physics, a kaon (/ˈkeɪ.ɒn/), also called a K meson and denoted K , is any of a group of four mesons distinguished by a quantum number called strangeness...

eta prime meson ( η′ ) are isosinglet mesons made of a mixture of up, down and strange quarks and their antiquarks. The charmed eta meson ( η c) and...

particle physics, the phi meson or ϕ meson is a vector meson formed of a strange quark and a strange antiquark. It was the ϕ meson's unusual propensity to...

ω and ϕ mesons are mixtures of the SU(3) wave functions as follows. ω = ψ 8 sin ⁡ θ + ψ 1 cos ⁡ θ {\displaystyle \omega =\psi _{8}\sin \theta +\psi _{1}\cos...

In particle physics, a meson (/ˈmiːzɒn, ˈmɛzɒn/) is a type of hadronic subatomic particle composed of an equal number of quarks and antiquarks, usually...

of a meson. "Exotic" hadrons, containing more than three valence quarks, have been discovered in recent years. A tetraquark state (an exotic meson), named...

In particle physics, a pion (or a pi meson, denoted with the Greek letter pi: π ) is any of three subatomic particles: π0 , π+ , and π− . Each pion consists...

those that are, are dubbed "hadrons", which are now further classified as mesons (middle mass) and baryons (heavy weight). But the discovery of the (neutral)...

The Upsilon meson ( ϒ ) is a quarkonium state (i.e. flavourless meson) formed from a bottom quark and its antiparticle. It was discovered by the E288...