Superstrings in graviphoton background and N=1/2 + 3/2 supersymmetry

Jun, 2003
11 pages
Published in:
  • JHEP 07 (2003) 010
e-Print:
Report number:
  • IFT-P-026-2003

Citations per year

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Abstract:
Motivated by Ooguri and Vafa, we study superstrings in flat R^4 in a constant self-dual graviphoton background. The supergravity equations of motion are satisfied in this background which deforms the N=2 d=4 flat space super-Poincare algebra to another algebra with eight supercharges. A D-brane in this space preserves a quarter of the supercharges: i.e. N=1/2 supersymmetry is realized linearly, and the remaining N=3/2 supersymmetry is realized nonlinearly. The theory on the brane can be described as a theory in noncommutative superspace in which the chiral fermionic coordinates θα\theta^\alpha of N=1 d=4 superspace are not Grassman variables but satisfy a Clifford algebra.
  • string model
  • background field
  • duality
  • supersymmetry: superfield
  • supersymmetry: deformation
  • graviphoton: background
  • membrane model: D-brane