共 24 条
SINGLET COUPLINGS AND (0,2)-MODELS
被引:24
作者:
DISTLER, J
KACHRU, S
机构:
[1] Joseph Henry Laboratories, Princeton University, Princeton
基金:
美国国家科学基金会;
关键词:
D O I:
10.1016/0550-3213(94)90648-3
中图分类号:
O412 [相对论、场论];
O572.2 [粒子物理学];
学科分类号:
摘要:
We use the quantum symmetries present in string compactification on Landau-Ginzburg orbifolds to prove the existence of a large class of exactly marginal (0,2) deformations of (2,2) superconformal theories. Analogous methods apply to the more general (0,2) models introduced earlier by the present authors, lending further credence to the fact that the corresponding Landau-Ginzburg models represent bona fide (0,2) SCFTs. We also use the large symmetry groups which arise when the worldsheet superpotential is turned off to constrain the dependence of certain correlation functions on the untwisted moduli. This allows us to approach the problem of what happens when one tries to deform away from the Landau-Ginzburg point. In particular, we find that the masses and three-point couplings of the massless E(6) singlets related to H-1(End(T)) vanish at all points in the quintic Kahler moduli space. Putting these results together, and invoking some plausible dynamical assumptions about the corresponding linear sigma-models, we show that one can deform these Landau-Ginzburg theories to arbitrary values of the Kahler moduli.
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页码:13 / 30
页数:18
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