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From maximal to minimal supersymmetry in string loop amplitudes | | Marcus Berg
; Igor Buchberger
; Oliver Schlotterer
; | | Date: |
16 Mar 2016 | | Abstract: | We calculate one-loop string amplitudes of open and closed strings with
N=1,2,4 supersymmetry in four and six dimensions, by compactification on
Calabi-Yau and K3 orbifolds. In particular, we develop a method to combine
contributions from all spin structures for arbitrary number of legs at minimal
supersymmetry. Each amplitude is cast into a compact form by reorganizing the
kinematic building blocks and casting the worldsheet integrals in a basis.
Infrared regularization plays an important role to exhibit the expected
factorization limits. We comment on implications for the one-loop string
effective action. | | Source: | arXiv, 1603.5262 | | Services: | Forum | Review | PDF | Favorites | |
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