منابع مشابه
Heterotic Orbifolds
A review of orbifold geometry is given, followed by a review of the construction of fourdimensional heterotic string models by compactification on a six-dimensional Z3 orbifold. Particular attention is given to the details of the transition from a classical theory to a first-quantized theory. Subsequently, a discussion is given of the systematic enumeration of all standard-like three generation...
متن کاملStrings on Orbifolds*
The most thoroughly understood example of superstring compactification is compactification on a fiat torus [1]. This example is exactly soluble and obeys all of the equations of string theory. It is also clearly a significant example since it is one way to understand the construction of the heterotic string theory [2]. For compact~ficatlon of physical dimensions from ten to four, the fiat torus...
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We perform the first systematic analysis of particle spectra obtained from heterotic string compactifications on non–Abelian toroidal orbifolds. After developing a new technique to compute the particle spectrum in the case of standard embedding based on higher dimensional supersymmetry, we compute the Hodge numbers for all recently classified 331 non–Abelian orbifold geometries which yield N = ...
متن کاملType IIB Orientifolds, F-theory, Type I Strings on Orbifolds and Type I - Heterotic Duality
We consider six and four dimensional N = 1 supersymmetric orientifolds of Type IIB compactified on orbifolds. We give the conditions under which the perturbative world-sheet orientifold approach is adequate, and list the four dimensional N = 1 orientifolds (which are rather constrained) that satisfy these conditions. We argue that in most cases orientifolds contain non-perturbative sectors that...
متن کاملN = 2 Strings on Orbifolds
We study closed N = 2 strings on orbifolds of the form T /Z2 and C /Z2. We compute the torus partition function and prove its modular invariance. We analyse the BRST cohomology of the theory, construct the vertex operators, and compute three and four point amplitudes of twisted and untwisted states. We introduce a background of D-branes, and compute twist states correlators.
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2010
ISSN: 1029-8479
DOI: 10.1007/jhep11(2010)115