e/Eta meson

Information
has gloss	eng: : \| electric_charge = 0 e \| color_charge = \| spin = Integer \| num_spin_states = }} The eta and eta prime meson are mesons made of a mixture of up, down and strange quarks and their antiquarks. The charmed eta meson and bottom eta meson are forms of quarkonium; they have the same spin and parity as the light eta but are made of charm quarks and bottom quarks respectively. The top quark is too heavy to form a similar meson (top eta meson, symbol ), due to its very fast decay.
lexicalization	eng: eta meson
instance of	(noun) (nontechnical usage) a tiny piece of anything molecule, speck, particle, corpuscle, mote, atom