
Here, we have a highly gifted researcher
in the field of PARTICLE physics...
The Big Bang Theory Season 3, Episode 15

Senior theoretical PARTICLE physicist
at CaITech, focusing on M Theory.
The Big Bang Theory Season 3, Episode 14

But Penny has no interest
in subatomic PARTICLE research.
The Big Bang Theory Season 3, Episode 15

of the Higgs boson PARTICLE,
and you said,
The Big Bang Theory Season 5, Episode 21

each vibration is
a different PARTICLE.
The Big Bang Theory Season 11, Episode 13