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High Energy Physics - Theory, hep-th
Abstract:
An N=1, d=4 supersymmetric compactification of the perturbative heterotic
string is described by a d=2 (0,2) superconformal field theory. The first-order
marginal deformations of the internal (0,2) SCFT are in 1 to 1 correspondence
with massless gauge-neutral scalars in the spacetime theory. Working at
tree-level in the alpha' expansion, we describe these first order deformations
for SCFTs with a (0,2) non-linear sigma model description. Our results clarify
the structure of deformations of heterotic Calabi-Yau compactifications and
more general heterotic flux vacua.