Will
New member
Hi,
According to Wikipedia (that ever so reliable source of information) the lowest energy state of a proton and a neutron is such that they have opposite spins and this has "to do with the quark structure". I have tried to figure this out in terms of the quark spin but whilst I can see why the two U quarks in the proton and the two D quarks in the neutron have opposite spin, I can't see a reason why the remaining D in the proton and U in the neutron must spin so that they have opposite overall spins.
Can anyone explain this?
Thanks,
Will
According to Wikipedia (that ever so reliable source of information) the lowest energy state of a proton and a neutron is such that they have opposite spins and this has "to do with the quark structure". I have tried to figure this out in terms of the quark spin but whilst I can see why the two U quarks in the proton and the two D quarks in the neutron have opposite spin, I can't see a reason why the remaining D in the proton and U in the neutron must spin so that they have opposite overall spins.
Can anyone explain this?
Thanks,
Will
