In case you didn't know, sometimes physicists use some . . . rather odd units. Particle physics can be really odd that way, where we even go so far as to say that the constants h-bar and c equal one, let normal units like meters and kilograms get rearranged accordingly, and therefore mass, momentum, and energy can all be described by the same units. From such lines of thought, we get the unit the barn. Unlike the slug, the outhouse, and the shed, the barn is a common unit despite its name.
Yes, those are real units.
