English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We obtain the one-loop propagators in superstring theory for the general casewhen the worldsheet fields satisfy non-trivial holonomy and/or boundaryconditions. Non-trivial holonomy arises in orbifold and orientifold backgroundswhereas non-trivial boundary conditions arise in backgrounds containingD-branes of different dimensionality or D-branes intersecting each other at anangle. In our derivation, we use a generalized version of the method of images.Dihedral groups play a crucial role in constructing the one-loop propagators.Comment: 27 pages, significantly extended section 3, minor changes to other  sections, references adde

Propagators on One-Loop Worldsheets for Orientifolds and Intersecting Branes