... the string modes lie on linearparallel Regge trajectories with this slope.162.4 QuantizationThe analysis of closed -string left-moving modes, closed -string right-moving modes, and open- string ... the particular choice d = 26, as we18arXiv:hep-ex/0008017 v1 9 Aug 2000CALT-6 8-2 293CITUSC/0 0-0 45hep-ex/0008017 Introduction to Superstring Theory John H. Schwarz1California Institute of ... turn to the closed -string spectrum. A closed -string state is described as atensor product of a left-moving state and a right-moving state, subject to the conditionthat the N value of the left-moving...