• K. Kikkawa
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 24)


The string model, which appeared as a theory of hadrons in the early 1970s is now being considered as a promising candidate for a unification theory of all fundamental interactions. After surveying difficulties in attempts of unifying theories in local field theory, we describe why the superstring is considered hopeful and what issues remain unsolved.


Conformal Invariance Heterotic String Grand Unify Theory World Sheet Fermion Generation 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • K. Kikkawa
    • 1
  1. 1.Department of PhysicsOsaka UniversityJapan

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