Four-loop QCD analysis of the Bjorken sum rule vs data

V. L. Khandramai, R. S. Pasechnik, D. V. Shirkov +2

We study the polarized Bjorken sum rule at low momentum transfers in the range $0.22<Q<1.73\mathrm{GeV}$ with the four-loop N${}^3$LO expression for the coefficient function $C_{\rm Bj…