Schrodinger left spin out of his wave equation originally. The math was too tough.
It still is a problem. That’s why there are no spin coupling mechanisms avail for nuclear and atomic (electron) spin phenomena, identified for a coherent QM system. Magnetic field coupling is the key IMHO. Changes in spin states involve no linear momentum and hence no energetic particles with linear momentum. (Except there may there may be virtual charged particles passing through a magnetic field that give up linear momentum to the magnetic field as angular momentum which shows up as spin energy in a coherent system in which the magnetic field exists.) Bob Cook ________________________________ From: MarkI-ZeroPoint <zeropo...@charter.net> Sent: Monday, January 8, 2018 8:12:27 PM To: firstname.lastname@example.org Subject: [Vo]:FYI: Surprising result shocks scientists studying spin Gee, physicists don’t know everything there is to know about atomic physics... could it be that the ‘Standard Model’ is missing a few parts! https://phys.org/news/2018-01-result-scientists.html "What we observed was totally amazing," said Brookhaven physicist Alexander Bazilevsky, a deputy spokesperson for the PHENIX collaboration at RHIC, which is reporting these results in a new paper just published in Physical Review Letters. "Our findings may mean that the mechanisms producing particles along the direction in which the spinning proton is traveling may be very different in proton-proton collisions<https://phys.org/tags/proton-proton+collisions/> compared with proton-nucleus collisions." Understanding different particle production mechanisms could have big implications for interpreting other high-energy particle collisions, including the interactions of ultra-high-energy cosmic rays with particles in the Earth's atmosphere, Bazilevsky said. -Mark Iverson