Gomis Torné, Joaquim2010-05-062010-05-0619890556-2821https://hdl.handle.net/2445/12451The string model with N=2 world-sheet supersymmetry is approached via ghosts, Becchi-Rouet-Stora-Tyutin cohomology, and bosonization. Some amplitudes involving massless scalars and vectors are computed at the tree level. The constraints of locality on the spectrum are analyzed. An attempt is made to "decompactify" the model into a four-dimensional theory.7 p.application/pdfeng(c) The American Physical Society, 1989Teoria de camps (Física)Relativitat general (Física)Partícules (Matèria)GravitacióField theory (Physics)General relativity (Physics)ParticlesGravitationinfo:eu-repo/semantics/article038977info:eu-repo/semantics/openAccess