266 citations · 797 across the 13 of their papers we have counts for
12 papers · 1 filter
EDM constraints and CP asymmetries of B processes in supersymmetric models
S. Abel, S. Khalil
We demonstrate that electric dipole moments (EDMs) strongly constrain possible SUSY contributions to the CP asymmetries of B processes; LL and/or RR flavour mixings between second…
Constraining the string scale: from Planck to Weak and back again
S. A. Abel, J. Santiago
String and field theory ideas have greatly influenced each other since the so called second string revolution. We review this interrelation paying particular attention to its pheno…
Flavour in Intersecting Brane Models and Bounds on the String Scale
S. Abel, O. Lebedev, J. Santiago
We study flavour issues in nonsupersymmetric intersecting brane models. Specifically, the purpose of the present paper is twofold: (i) to determine whether realistic flavour struct…
Flavour Changing Neutral Currents in Intersecting Brane Models
S. Abel, M. Masip, J. Santiago
Intersecting D-brane models provide an attractive explanation of family replication in the context of string theory. We show, however, that the localization of fermion families at…
The String CP Problem
S. Abel, S. Khalil, O. Lebedev
We show that string models with low energy supersymmetry which accommodate the fermion mass hierarchy generally give non-universal soft trilinear couplings (A-terms). In conjunctio…
CP and Flavour in Effective Type I String Models
S. A Abel, G. Servant
Effective type I string models allow stabilization of the dilaton and moduli fields with only a single gaugino condensate. We show that, as well as breaking supersymmetry, the stab…
EDM Constraints in Supersymmetric Theories
S. Abel, S. Khalil, O. Lebedev
We systematically analyze constraints on supersymmetric theories imposed by the experimental bounds on the electron, neutron, and mercury electric dipole moments. We critically rea…
On the EDM Cancellations in D-brane models
S. Abel, S. Khalil, O. Lebedev
We analyze the possibility of simultaneous electron, neutron, and mercury electric dipole moment (EDM) cancellations in the mSUGRA and D--brane models. We find that the mercury EDM…
Soft SUSY Breaking, Dilaton Domination and Intermediate Scale String Models
S. A. Abel, B. C. Allanach, L. Ibanez +2
We present an analysis of the low-energy implications of an intermediate scale ~10^{11} GeV string theory. We mainly focus on the evolution of the physical parameters under the ren…
Dipole moments of the Electron, Neutrino and Neutron in the MSSM without R-parity Symmetry
S. A. Abel, A. Dedes, H. K. Dreiner
We show that in the MSSM without R-parity symmetry there are no new contributions to electron and neutron electric dipole moments (EDMs) at 1-loop induced by the R-parity violating…
Destabilising Divergences in the NMSSM
S. A. Abel
The problem of destabilising divergences is discussed for singlet extensions of the MSSM. It is shown that models which possess either gauged- symmetry or target space duality a…
Could the MSSM have no CP violation in the CKM matrix?
S. A. Abel, J. -M. Frere
We show that all CP violation in the MSSM could originate in the supersymmetry breaking sector rather than the CKM matrix, and discuss the important consequences for -physics.