TY - CHAP

T1 - Partition function and spectrum

AU - Choi, Kang Sin

AU - Kim, Jihn E.

PY - 2006

Y1 - 2006

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=33749169686&partnerID=8YFLogxK

U2 - 10.1007/3-540-32764-9_7

DO - 10.1007/3-540-32764-9_7

M3 - Chapter

AN - SCOPUS:33749169686

SN - 3540327630

SN - 9783540327639

T3 - Lecture Notes in Physics

SP - 185

EP - 202

BT - Quarks and Leptons From Orbifolded Superstring

ER -