Here's where we derived the mass
of the dark-matter PARTICLE.
The Big Bang Theory Season 3, Episode 4
But Penny has no interest
in subatomic PARTICLE research.
The Big Bang Theory Season 3, Episode 15
to isolate the Higgs
boson PARTICLE.
The Big Bang Theory Season 5, Episode 4
each vibration is
a different PARTICLE.
The Big Bang Theory Season 11, Episode 13
...of a subatomic PARTICLE
called the Higgs boson.
The Big Bang Theory Season 6, Episode 3