"Higgs boson PARTICLE."
How could you not get that?
The Big Bang Theory Season 3, Episode 13
Here, we have a highly gifted researcher
in the field of PARTICLE physics...
The Big Bang Theory Season 3, Episode 15
of the Higgs boson PARTICLE,
and you said,
The Big Bang Theory Season 5, Episode 21
...of a subatomic PARTICLE
called the Higgs boson.
The Big Bang Theory Season 6, Episode 3
A sigma PARTICLE.
The Big Bang Theory Season 1, Episode 13