Author(s): Yi-Bo Yang, Raza Sabbir Sufian, Andrei Alexandru, Terrence Draper, Michael J. Glatzmaier, Keh-Fei Liu, and Yong Zhao (χQCD Collaboration)
Computer simulations indicate that about 50% of the proton’s spin comes from the spin of the gluons that bind its quark constituents.
[Phys. Rev. Lett. 118, 102001] Published Mon Mar 06, 2017