(Weak) G_2 Holonomy from Self-duality, Flux and Supersymmetry (2001)
The aim of this paper is two-fold. First, we provide a simple and pedagogical discussion of how compactifications of M-theory or supergravity preserving some four-dimensional supersymmetry naturally...
Supersymmetric non-abelian Born-Infeld revisited (2001)
Bergshoeff, E. A., Bilal, A., De Roo, M., Sevrin, A.
We determine the non-abelian Born-Infeld action, including fermions, as it results from the four-point tree-level open superstring scattering amplitudes at order alpha'^2. We find that, after an...
Supersymmetry and finite-temperature strings (2000)
Bakas, I., Bilal, A., Sfetsos, K.
We describe finite temperature N=4 superstrings in D=5 by an effective four-dimensional supergravity of the thermal winding modes that can become tachyonic and trigger the instabilities at the...
BPS Solutions and New Phases of Finite-Temperature Strings (2000)
Bakas, I., Bilal, A., Sfetsos, K.
All high-temperature phases of the known N=4 superstrings in five dimensions can be described by the universal thermal potential of an effective four-dimensional supergravity. This theory, in...
Hamiltonian Approach to 2D Dilaton-Gravities and Invariant Adm Mass (1993)
The formula existing in the literature for the ADM mass of 2D dilaton gravity is incomplete. For example, in the case of an infalling matter shockwave this formula fails to give a time-independent...