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Author Topic: Does odd integer spin result in repulsive potential?  (Read 2354 times)

Offline DoctorBeaver

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Reading about Yakawa couplings and the article http://en.wikipedia.org/wiki/Yukawa_model states that "...the Yukawa particle has spin zero and even spin always results in an attractive potential."

Is it only even spin that results in an attractive potetial?
Does odd spin result in repulsive potential?


 

Offline Vern

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Does odd integer spin result in repulsive potential?
« Reply #1 on: 28/01/2009 18:44:16 »
I don't think you could say that it is only even spin that results in attractive force since the electron is spin 1/2; I have trouble making that an even number:) Maybe it is and it just doesn't click. The photon is spin 1 and it is supposed to be charge neutral.

 

Offline DoctorBeaver

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Does odd integer spin result in repulsive potential?
« Reply #2 on: 28/01/2009 18:53:45 »
Do you not need to add the spin of the interacting particles together? Take 2 electrons of spin 1/2 and you get 1: repulsion?

I can't answer your point about the photon without a little thinkipoos.
 

Offline Vern

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Does odd integer spin result in repulsive potential?
« Reply #3 on: 28/01/2009 19:11:00 »
Do you not need to add the spin of the interacting particles together? Take 2 electrons of spin 1/2 and you get 1: repulsion?

I can't answer your point about the photon without a little thinkipoos.
Ok; that makes sense.
 

Offline JP

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Does odd integer spin result in repulsive potential?
« Reply #4 on: 28/01/2009 19:45:39 »
Actually, I think it might be a bit different.  From that article, the Yukawa particle seems to be talking about the particles that make up the strong force's field, just like photons make up the electromagnetic field.  The Yukawa particles are spin 0, which from the article, means that the field is attractive only (gravitons are believed to be spin 2, and gravity is also an attraction-only field). Photons are spin 1, and electromagnetism is attractive or repulsive.   
 

Offline DoctorBeaver

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Does odd integer spin result in repulsive potential?
« Reply #5 on: 28/01/2009 20:08:42 »
jpetruccelli - that sounds eminently feasible.
 

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Does odd integer spin result in repulsive potential?
« Reply #5 on: 28/01/2009 20:08:42 »

 

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