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- Centre National de la Recherche ScientifiqueFR62 papers
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5 papers · 2 filters
Aspects of D-brane dynamics on orbifolds
Faheem Hussain, Roberto Iengo, Carmen Nunez +1
We discuss D-brane dynamics in orbifold compactifications of type II superstring theory. We compute the interaction potential between two D-branes moving with constant velocities a…
Closed string radiation from moving D-branes
Faheem Hussain, Roberto Iengo, Carmen Nunez +1
We compute the amplitude for the radiation of massless NS-NS closed string states from the interaction of two moving D-branes. We consider particle-like D-branes with reference to…
Matching the BPS Spectra of Heterotic - Type I - Type I' Strings
D. Matalliotakis, H. P. Nilles, S. Theisen
We give a detailed discussion of the matching of the BPS states of heterotic, type I and type I' theories in d=9 for general backgrounds. This allows us to explicitly identify thes…
String Amplitudes and N=2, d=4 Prepotential in Heterotic K3 x T^2 Compactifications
K. Foerger, S. Stieberger
For the gauge couplings, which arise after toroidal compactification of six-dimensional heterotic N=1 string theories from the T^2 torus, we calculate their one-loop corrections. T…
String-Unification, Universal One-Loop Corrections and Strongly Coupled Heterotic String Theory
H. P. Nilles, S. Stieberger
We derive the universal threshold corrections in heterotic string theory including a continuous Wilson line. Unification of gauge and gravitational couplings is shown to be possibl…