Here's where we derived the mass
of the dark-matter PARTICLE.
The Big Bang Theory Season 3, Episode 4
each vibration is
a different PARTICLE.
The Big Bang Theory Season 11, Episode 13
You'd be surprised how many
PARTICLE physicists have a whimsical side.
The Big Bang Theory Season 2, Episode 13
But Penny has no interest
in subatomic PARTICLE research.
The Big Bang Theory Season 3, Episode 15
A sigma PARTICLE.
The Big Bang Theory Season 1, Episode 13