287 citations · 665 across the 7 of their papers we have counts for
7 papers · 1 filter
Instanton Induced Neutrino Majorana Masses in CFT Orientifolds with MSSM-like spectra
L. E. Ibanez, A. N. Schellekens, A. M. Uranga
Recently it has been shown that string instanton effects may give rise to neutrino Majorana masses in certain classes of semi-realistic string compactifications. In this paper we m…
Neutrino Majorana Masses from String Theory Instanton Effects
L. E. Ibanez, A. M. Uranga
Finding a plausible origin for right-handed neutrino Majorana masses in semirealistic compactifications of string theory remains one of the most difficult problems in string phenom…
Coisotropic D8-branes and Model-building
A. Font, L. E. Ibanez, F. Marchesano
Up to now chiral type IIA vacua have been mostly based on intersecting D6-branes wrapping special Lagrangian 3-cycles on a CY three-fold. We argue that there are additional BPS D-b…
Flux-Induced Baryon Asymmetry
L. E. Ibanez
I propose that the primordial baryon asymmetry of the universe was induced by the presence of a non-vanishing antisymmetric field background H_ijk across the three space dimensions…
Fluxes, moduli fixing and MSSM-like vacua in a simple IIA orientifold
P. G. Camara, A. Font, L. E. Ibanez
We study the effects of adding RR, NS and metric fluxes on a T^6/(Ω(-1)^{F_L} I_3) Type IIA orientifold. By using the effective flux-induced superpotential we obtain Minkowski or A…
Flux-induced SUSY-breaking soft terms on D7-D3 brane systems
P. G. Camara, L. E. Ibanez, A. M. Uranga
We study the effect of RR and NSNS 3-form fluxes on the effective action of the worldvolume fields of Type IIB D7/D3-brane configurations. The D7-branes wrap 4-cycles on a local Ca…