Lithium fine structure in the 1s(2) 2p P-2(J) states

The first fully correlated calculations of fine structure in lithium are presented. For the 1s(2) 2p(2) states the fine structure is calculated to a computational accuracy of 1 part in 10(6), including relativistic and QED terms up to O(alpha(4)mc(2)), O((mu/M)zeta(4)mc(2)), O(alpha(5)mc(2)), and O((mu/M)alpha(5)mc(2)). A comparison is made with other calculations and experiments. A residual discrepancy between theory and experiment of (65 +/- 2) x 10(-6) cm(-1) is found due to higher-order QED terms.