Theta meson
The theta meson is a hypothetical form of quarkonium formed by a top quark and top antiquark. As a P-odd and C-odd
t
t
state, it is analogous to the
ϕ
,
J/ψ
and
ϒ
mesons. Due to the top quark's short lifetime, the theta meson is expected to not be... Wikipedia
C parity: −1
Composition: t; t