I have found same late breaking theory produce this June on the proton spin puzzle. It is important to get the latest research on this subject.
http://cyclotron.tamu.edu/reu/2014%20lecture%20notes/gagliardi_reu_2014.pdf *Exploring the Proton Spin with STAR* In conclusion: • We still have a great deal to learn about the structure of the proton • RHIC is making significant contributions to three poorly constrained pieces of the puzzle – Gluon polarization • May contribute as much or more to the proton spin as the quarks and anti-quarks – Flavor-separated quark and anti-quark polarizations – Transversity • Still more data have been recorded and are being analyzed at this moment. Stay tuned ------------------------------------------------------ I feel it is important to understand the correct makeup of the proton and the neutron in terms of spin production to understand how a strong magnetic field might affect the structure of these fermions if at all. The magnetic disruption could happen at a higher level in the nucleus where a magnetic field can catalyze pions from the vacuum. Or both mechanisms might occur if the magnetic field is strong enough. On Tue, Jul 8, 2014 at 5:40 PM, <[email protected]> wrote: > In reply to Axil Axil's message of Mon, 7 Jul 2014 19:42:22 -0400: > Hi, > >From the referenced article: > > > ><Snip> > > > >The quarks have spin 1/2, so physicists originally assumed that two of the > >quarks were in opposite alignment (cancelling their spin), leaving one > >unpaired quark to give the proton spin. However, measurements of > >muon-proton collisions found only a quarter of the proton’s spin comes > from > >quark spins. The rest has to come from gluon spins and/or the orbital > >motion of quarks and gluons inside the proton. > > The orbital motion of quarks is a good candidate. See > http://checkerboard.dnsalias.net/ > > > > ><EndSnip> > > > >I referenced this article to show that gluons have spin and/or can produce > >spin. > > > >I believe that the standard model doctrinaire on gluon interactions that > >gluons can not interact with photons. > > > >I don't understand how a gluons can demonstrate magnetic properties(spin) > > A static magnetic field is only associated with spin if the particle is > charged. > A neutral rotating elementary particle (not a composite particle) would > have > spin, but no static magnetic field. > [snip] > Regards, > > Robin van Spaandonk > > http://rvanspaa.freehostia.com/project.html > >
