Axialvector tetraquark candidates for Zc(3900), Zc(4020), Zc(4430), and Zc(4600)

We construct the axialvector and tensor current operators to systematically investigate the ground and first radially excited tetraquark states with quantum numbers JP' = l' using the QCD sum rules. We observe one axialvector tetraquark candidate for 4(3900) and 4(4430), two axialvector tetraquark candidates for the 4(4020), and three axialvector tetraquark candidates for 4(4600).