Superstrings in graviphoton background and N=1/2 + 3/2 supersymmetry
Jun, 200311 pages
Published in:
- JHEP 07 (2003) 010
e-Print:
- hep-th/0306226 [hep-th]
Report number:
- IFT-P-026-2003
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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 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
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