On Slow-roll Moduli Inflation in Massive IIA Supergravity with Metric Fluxes (2008)
Flauger, Raphael, Paban, Sonia, Robbins, Daniel, Wrase, Timm
We derive several no-go theorems in the context of massive type IIA string theory compactified to four dimensions in a way that, in the absence of fluxes, preserves N=1 supersymmetry. Our derivation...
Vacuum Bubble in an Inhomogeneous Cosmology (2007)
Fischler, Willy, Krishnan, Chethan, Paban, Sonia, Zanic, Marija
We study the propagation of bubbles of new vacuum in a radially inhomogeneous Lemaitre-Tolman-Bondi background that includes a cosmological constant. This exemplifies the classical evolution of a...
Non-commutativity and Supersymmetry (2002)
Paban, Sonia, Sethi, Savdeep, Stern, Mark
We study the extent to which the gauge symmetry of abelian Yang-Mills can be deformed under two conditions: first, that the deformation depend on a two-form scale. Second, that the deformation...
Summing Up Instantons in Three-Dimensional Yang-Mills Theories (1998)
Paban, Sonia, Sethi, Savdeep, Stern, Mark
We show that the four derivative terms in the effective action of three-dimensional N=8 Yang-Mills theory are determined by supersymmetry. These terms receive both perturbative and non-perturbative...
Supersymmetry and Higher Derivative Terms in the Effective Action of Yang-Mills Theories (1998)
Paban, Sonia, Sethi, Savdeep, Stern, Mark
Higher derivative terms in the effective action of certain Yang-Mills theories can be severely constrained by supersymmetry. We show that requiring sixteen supersymmetries in quantum mechanical gauge...
Constraints From Extended Supersymmetry in Quantum Mechanics (1998)
Paban, Sonia, Sethi, Savdeep, Stern, Mark
We consider quantum mechanical gauge theories with sixteen supersymmetries. The Hamiltonians or Lagrangians characterizing these theories can contain higher derivative terms. In the operator...
Berenstein, David, Corrado, Richard, Fischler, Willy, Paban, Sonia, Rozali, Moshe
Using a formalism developed to include collective coordinates, we calculate the contributions to S-matrix elements due to off-shell D-branes in a string coupling expansion. The formalism is further...
Collective coordinates for D-branes (1996)
Fischler, Willy, Paban, Sonia, Rozali, Moshe
We develope a formalism for the scattering off D-branes that includes collective coordinates. This allows a systematic expansion in the string coupling constant for such processes, including a...
Collective Coordinates in String Theory (1995)
Fischler, Willy, Paban, Sonia, Rozali, Moshe
The emergence of violations of conformal invariance in the form of non-local operators in the two-dimensional action describing solitons inevitably leads to the introduction of collective coordinates...
Stability of Neutrinos in the Singlet Majoron Model (1993)
Cline, James M., Kainulainen, Kimmo, Paban, Sonia
We show that there is no one-loop enhancement of the rate for a light neutrino to decay into a lighter neutrino plus a majoron, contrary to a recent claim. Thus the light neutrinos must satisfy the...
Bounds on Microscopic Physics from P and T Violation in Atoms and Molecules (1992)
Fischler, Willy, Paban, Sonia, Thomas, Scott
Atomic and molecular electric dipole moments are calculated within the minimal supersymmetric standard model. Present experiments already provide strong bounds on the combination of phases...
On Slow-roll Moduli Inflation in Massive IIA Supergravity with Metric Fluxes
Flauger, Raphael, Paban, Sonia, Robbins, Daniel, Wrase, Timm
We derive several no-go theorems in the context of massive type IIA string theory compactified to four dimensions in a way that, in the absence of fluxes, preserves N=1 supersymmetry. Our derivation...