On zero modes of the eleven dimensional superstring
arXiv:hep-th/9801176 · doi:10.1103/PhysRevD.59.048902
Abstract
It is shown that recently pointed out by Berkovits on-shell degrees of freedom of the D=11 superstring do not make contributions into the quantum states spectrum of the theory. As a consequence, the spectrum coincides with that of the D=10 type IIA superstring.
7 pages, LaTex file