• Publications
  • Influence
Four-dimensional string compactifications with D-branes, orientifolds and fluxes
This review article provides a pedagogical introduction into various classes of chiral string compactifications to four dimensions with D-branes and fluxes. The main concern is to provide allExpand
  • 741
  • 23
  • PDF
Flux-induced soft supersymmetry breaking in chiral type IIB orientifolds with D3 / D7-branes
Abstract We discuss supersymmetry breaking via 3-form fluxes in chiral supersymmetric type IIB orientifold vacua with D3- and D7-branes. After a general discussion of possible choices of fluxesExpand
  • 181
  • 13
  • PDF
Closed string amplitudes as single-valued open string amplitudes
We show that the single trace heterotic N-point tree-level gauge amplitude ANHET can be obtained from the corresponding type I amplitude ANI by the single-valued (sv) projection: ANHET=sv(ANI). ThisExpand
  • 73
  • 10
  • PDF
Scattering of gauge, matter, and moduli fields from intersecting branes
Abstract We calculate various tree-level (disk) scattering amplitudes involving gauge, matter and moduli fields in IIB toroidal orbifold/orientifold backgrounds with D9-, D5- respectively D7-,Expand
  • 209
  • 10
  • PDF
E7(7) constraints on counterterms in N=8 supergravity
Abstract We prove by explicit computation that 6-point matrix elements of D 4 R 4 and D 6 R 4 in N = 8 supergravity have non-vanishing single-soft scalar limits, and therefore these operators violateExpand
  • 127
  • 9
  • PDF
Supersymmetry relations and MHV amplitudes in superstring theory
Abstract We discuss supersymmetric Ward identities relating various scattering amplitudes in type I open superstring theory. We show that at the disk level, the form of such relations remains exactlyExpand
  • 58
  • 8
  • PDF
The LHC string Hunter's companion
Abstract The mass scale of fundamental strings can be as low as few TeV / c 2 provided that spacetime extends into large extra dimensions. We discuss the phenomenological aspects of weakly coupledExpand
  • 118
  • 8
  • PDF
Prepotential, Mirror Map and F-Theory on K3
We compute certain one-loop corrections to F^4 couplings of the heterotic string compactified on T^2, and show that they can be characterized by holomorphic prepotentials. We then discuss how some ofExpand
  • 81
  • 8
  • PDF
Complete N-Point Superstring Disk Amplitude II. Amplitude and Hypergeometric Function Structure
Using the pure spinor formalism in part I (Mafra et al., preprint [1]) we compute the complete tree-level amplitude of N massless open strings and find a striking simple and compact form in terms ofExpand
  • 133
  • 7
  • PDF
F-theory flux, destabilization of orientifolds and soft terms on D7-branes
Abstract We use F-theory to derive a general expression for the flux potential of type II compactifications with D7/D3 branes, including open string moduli and 2-form fluxes on the branes. Our mainExpand
  • 110
  • 7
  • PDF
...
1
2
3
4
5
...