Partition function and spectrum

Kang Sin Choi, Jihn E. Kim

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


We have seen in Subsect. 5.3.4 that the only modular invariant lattices in sixteen dimensions are those of E8×E8 and SO(32), while the ten dimensional spacetime part is independently modular invariant. But if we relax this condition such that it is modular invariant in the entire 26 dimensions, we have a more general theory. One fruitful result was the discovery of SO(16)×SO(16) heterotic string without supersymmetry [1], but its applicability is much more profound. This leads to a huge class of orbifold models which we discuss in this book. Furthermore, taking into account the right movers also, we can have a more general modular invariance, leading to the asymmetric orbifold.

Original languageEnglish
Title of host publicationQuarks and Leptons From Orbifolded Superstring
Number of pages18
StatePublished - 2006

Publication series

NameLecture Notes in Physics
ISSN (Print)0075-8450


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