Crossword puzzle clue "meson particle that is its own antiparticle"

Here are the possible solutions for meson particle that is its own antiparticle clue

Answer
Clue
Relevancy
eta
Clue
___ meson (particle that is its own antiparticle)
___ particle (electrically neutral meson)
Type of meson
Definition
a Greek letter
photon
Clue
Particle that is its own antiparticle
Definition
a quantum of light or other electromagnetic radiation
psi
Clue
___ particle (unstable meson)
Definition
a Greek letter
positron
Clue
Antiparticle first observed in 1929
Definition
an electron but with a positive charge, also POSITON
upsilon
Clue
Meson made up of a bottom quark and its antiquark
kaon
Clue
Unstable meson
Definition
an elementary particle of the meson family

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