A note on topological amplitudes in hybrid string theory
Käppeli J. (Max Planck Institut für Gravitationsphysik Albert Einstein Institut, Am Mühlenberg 1, D-14476 Golm, GERMANY) Theisen S. (Max Planck Institut für Gravitationsphysik Albert Einstein Institut, Am Mühlenberg 1, D-14476 Golm, GERMANY) Vanhove P. (CEA, DSM, SPhT (Service de Physique Théorique), F-91191 Gif-sur-Yvette, FRANCE)
Abstract: We study four-dimensional compactifications of type II superstrings
on Calabi-Yau spaces using the formalism of hybrid string theory.
Chiral and twisted-chiral interactions are rederived, which involve
the coupling of the compactification moduli to two powers of the
Weyl-tensor and of the derivative of the universal tensor
field-strength.