Twistors can represent the spin in superstring theory and provide a theoretical explanation of the two-dimensional spherical model of elementary particles together with the surface distributions of the charges. The integrability of certain matter sectors of the strong interactions also may be traced to the action of the conformal group on collinear trajectories that occur in a twistor formulation. The amplitudes for these scattering processes in four dimensions have a representation with quantum states in a nonsupersymmetric theory defined by the low-energy limit of a solution to the N = 2 string equations with a Wick rotation of the metric with (2, 2) signature. The twistor form of an N = 2 scattering amplitude is given.
Transport, Periodic, Doped, Metallic, Nanotube, Ballistic, Symmetry
