- #1
JustinLevy
- 895
- 1
can particles be "weak force" charge neutral?
In the standard model we have fermions of various electrical charges, including neutral. In some sense, we can consider right handed electrons as "weak force" neutral, however the mass term kind of "mixes" the left and right handed.
Is there something from representation theory that forbids us from getting a particle that is completely weak force neutral, strong force neutral, and electrically neutral?
While I see people choose representations in a theory to match the known particles, does this also work the other way ... the theory with a particular symmetry dictates for us which representations we _have_ to use for the particles?
I'm curious why dark matter is assumed to be something so mysterious. Is there some reason why we can't just add another particle to the standard mode which is neutral in all charges? Even when people discuss supersymmetric theories, there seems to be an assumption the particles have "weak force" charge.
In the standard model we have fermions of various electrical charges, including neutral. In some sense, we can consider right handed electrons as "weak force" neutral, however the mass term kind of "mixes" the left and right handed.
Is there something from representation theory that forbids us from getting a particle that is completely weak force neutral, strong force neutral, and electrically neutral?
While I see people choose representations in a theory to match the known particles, does this also work the other way ... the theory with a particular symmetry dictates for us which representations we _have_ to use for the particles?
I'm curious why dark matter is assumed to be something so mysterious. Is there some reason why we can't just add another particle to the standard mode which is neutral in all charges? Even when people discuss supersymmetric theories, there seems to be an assumption the particles have "weak force" charge.