Concerning extension of the Standard Model
I would like to make a conjecture and call it Spin Inversion Symmetry. It says: every elementary particle in the Standard Model (except for the Higgs) of spin s has a partner of spin 1/s.
So the fermions (spin 1/2) in the Standard Model would have spin 2 partners and the bosons (spin 1) in the Standard Model would be their own partner.
Of course, for this to work we need to have at least one spin 2 particle. Maybe more. The only known spin 2 particle is the hypothetical graviton. So gravity appears automatically, and perhaps a whole family of other spin 2 particles.
Let's look more closely. Assuming charge is conserved the only particle in the Standard Model that could have a spin 2 neutral partner is the neutrino. So the neutrino is the partner of the graviton. What about the electron? This would have a charged spin 2 partner. As would all the other charged spin 1/2 fermions.
So my conjecture makes a very specific prediction - a whole family of spin 2 particles, one is neutral (the graviton) but the rest are charged.
Now we just need to find them. And the existence of tensor mesons shows that nature is not averse to spin 2 charged particles.
Tech Notes:
Content written and posted by Ken Abbott abbottsystems@gmail.com
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