Speaker
Prof.
Yuji Goto
(RIKEN)
Description
We have been studying the origin of the spin inside the proton using polarized proton collisions by the RHIC accelerator at Brookhaven National Laboratory in the United States. The proton spin cannot be explained by the spin of the quark inside the proton alone, but must be explained by the addition of the spin of the gluon and the orbital motion of the quark and the gluon inside the proton, which is not easy to measure. In this talk, we will present the results measured by the PHENIX experiment and the prospects for the results obtained by the sPHENIX experiment, which is currently underway.
