  We present the technique for resummation of flux tube excitations series
arising in pentagon operator expansion program for polygonal Wilson loops in
N=4 SYM. Here we restrict ourselves with contributions of one-particle
effective states and consider as a particular example NMHV 6 particle amplitude
at one-loop. The presented technique is also applicable at higher loops for one
effective particle contributions and has the potential for generalization for
contributions with more effective particles.
