What Particles Could Have Spin 2 1/2 in Physics?

[ImaLooser]

The "spin family" art works have a model of something with spin 2 1/2. I can't find any particle with this property. The max seems to be the graviton with spin 2.

?

 

[ImaLooser]

The "spin family" art works have a model of something with spin 2 1/2. I can't find any particle with this property. The max seems to be the graviton with spin 2.

?

OK, I'm going to assume that there is no such thing, sculpture notwithstanding.

 

[fzero]

There aren't any elementary particles with spin 5/2 is nature. There are however bound states with total angular momentum 5/2. Examples include certain excited states of the proton and neutron, as well as atomic ions like Cu²⁺.

 

[ImaLooser]

There aren't any elementary particles with spin 5/2 is nature. There are however bound states with total angular momentum 5/2. Examples include certain excited states of the proton and neutron, as well as atomic ions like Cu²⁺.

Aha, now we're getting somewhere. So is there any theoretical limit on the amount of spin a particle can have?

 

[dextercioby]

Read this and the original article by Weinberg & Witten http://en.wikipedia.org/wiki/Weinberg-Witten_theorem. I don't know of other stronger result.