Titlebook: Basic Concepts of String Theory; Ralph Blumenhagen,Dieter Lüst,Stefan Theisen Textbook 2013 Springer-Verlag Berlin Heidelberg 2013 BRST Qu

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Toroidal Compactifications: 10-Dimensional Heterotic String,dditional sixteen dimensions are compactified on the weight-lattice of .or .. We then study D-branes on toroidal spaces and how they transform under T-duality. We introduce intersecting D-branes, their T-dual images and simple orientifolds on such toroidal spaces.

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1864-5879 ok for courses and for self-study.Includes supplementary matThe purpose of this book is to thoroughly prepare the reader for research in string theory at an intermediate level.  As such it is not a compendium of results but intended as textbook in the sense that most of the material is organized in

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D. A. H. Murray,A. G. L. Wilsonroblem was the existence of a critical dimension, which is 26 for the bosonic string and 10 for the fermionic string. Another obstacle for the interpretation of string theory as a theory of strong interactions was the existence of a massless spin two particle which is not present in the hadronic world.

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https://doi.org/10.1007/978-1-4419-9979-5stinction between Neveu-Schwarz and Ramond sectors. The oscillator expansions of the world-sheet fermions differ in the two sectors. We close with an appendix on spinors in two dimensions. Quantisation of the fermionic string will be the subject of the following chapter.

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