The standard what? The Standard Model is the current
Theory which governs all known strong
and electroweak interactions. This
includes basically everything that has
EVER been measured by humans (sans
gravity).
It really is the best Theory that we have. It has been fantastically
successful in predicting and explaining
data; there are no obvious or overt
violations of this Theory. Nerds can go
read (or add more information :/) about
it here.
How long did it take to type? In it's current form, the actual equation have took about four hours (spread over almost a week) to write into a file using LaTeX. And sadly, the typist think there is a sign error somewhere, but he just don't have the energy to hunt it down.
