Einstein Supergravity and New Twistor String Theories (2006)
Abou-Zeid, Mohab, Hull, Christopher M., Mason, Lionel J.
A family of new twistor string theories is constructed and shown to be free from world-sheet anomalies. The spectra in space-time are calculated and shown to give Einstein supergravities with second...
Comments on the Energy-Momentum Tensor in Non-Commutative Field Theories (2001)
Abou-Zeid, Mohab, Dorn, Harald
In a non-commutative field theory, the energy-momentum tensor obtained from the Noether method needs not be symmetric; in a massless theory, it needs not be traceless either. In a non-commutative...
Dynamics of Wilson Observables in Non-Commutative Gauge Theory (2000)
Abou-Zeid, Mohab, Dorn, Harald
An equation for the quantum average of the gauge invariant Wilson loop in non-commutative Yang-Mills theory with gauge group U(N) is obtained. In the 't Hooft limit, the equation reduces to the loop...
Actions for Curved Branes (2000)
The nondeterminantal forms of the Born-Infeld and related brane actions in which the gauge fields couple to both an induced metric and an intrinsic metric are generalised by letting either or both...
On spacetime supersymmetry and string duality in nine dimensions (2000)
Abou-Zeid,Mohab, Nicolai,Hermann
N = 2 extended space-time supersymmetry in nine dimensions implies that the BPS states corresponding to momentum and winding of either of the type-II superstrings compactified on S1 transform as...
On spacetime supersymmetry and string duality in nine dimensions (2000)
Abou-Zeid, Mohab, Nicolai, Hermann
N = 2 extended space-time supersymmetry in nine dimensions implies that the BPS states corresponding to momentum and winding of either of the type-II superstrings compactified on S1 transform as...
Radiation from Accelerated Branes (1999)
Abou-Zeid, Mohab, Costa, Miguel S.
The radiation emitted by accelerated fundamental strings and D-branes is studied within the linear approximation to the supergravity limit of string theory. We show that scalar, gauge field and...
Space-Time Supersymmetry, IIA/B Duality and M-Theory (1999)
Abou-Zeid, Mohab, De Wit, Bernard, Lust, Dieter, Nicolai, Hermann
The connection between IIA superstring theory compactified on a circle of radius R and IIB theory compactified on a circle of radius 1/R is reexamined from the perspective of N=2, D=9 space-time...
The geometry of Sigma-models with twisted supersymmetry. (1999)
Abou-Zeid, Mohab, Hull, Christopher M.
The connection between IIA superstring theory compactified on a circle of radius R and IIB theory compactified on a circle of radius 1/R is reexamined from the perspective of N=2, D=9 space-time...
The geometry of Sigma-models with twisted supersymmetry. (1999)
Abou-Zeid, Mohab, Hull, Christopher M.
We investigate the relation between supersymmetry and geometry for two dimensional sigma models with target spaces of arbitrary signature, and Lorentzian or Euclidean world-sheets. In particular, we...
Space-time supersymmetry, IIA/B duality and M-theory (1999)
Abou-Zeid, Mohab, De Wit, Bernard, Lüst, Dieter, Nicolai, Hermann
The connection between IIA superstring theory compactified on a circle of radius R and IIB theory compactified on a circle of radius 1/R is reexamined from the perspective of N=2, D=9 space-time...