The theta meson () is a hypothetical form of
quarkonium
In particle physics, quarkonium (from quark and -onium, pl. quarkonia) is a flavorless meson whose constituents are a heavy quark and its own antiquark, making it both a neutral particle and its own antiparticle.
Light quarks
Light quarks ( ...
(i.e. a
flavourless meson
In particle physics, a meson ( or ) is a type of hadronic subatomic particle composed of an equal number of quarks and antiquarks, usually one of each, bound together by the strong interaction. Because mesons are composed of quark subparticles, ...
) formed by a
top quark
The top quark, sometimes also referred to as the truth quark, (symbol: t) is the most massive of all observed elementary particles. It derives its mass from its coupling to the Higgs Boson. This coupling y_ is very close to unity; in the Standard ...
() and top antiquark (). As a
P-odd and
C-odd state, it is analogous to the
(),
() and
() mesons. Due to the top quark's short lifetime, the theta meson is expected to not be observed in nature.
See also
*
List of mesons
:''This list is of all known and predicted scalar, pseudoscalar and vector mesons. See list of particles for a more detailed list of particles found in particle physics.''
This article contains a list of mesons, unstable subatomic particles ...
References
Mesons
Onia
Hypothetical composite particles
Subatomic particles with spin 1
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