Superstrings in graviphoton background and N=1/2+3/2 supersymmetry
Nenhuma Miniatura disponível
Data
2003-07-01
Autores
Berkovits, N.
Seiberg, N.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Int School Advanced Studies
Resumo
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 theta(alpha) of N = 1 d = 4 superspace are not Grassman variables but satisfy a Clifford algebra.
Descrição
Palavras-chave
superstrings and heterotic strings, D-branes, superspaces
Como citar
Journal of High Energy Physics. Trieste: Int School Advanced Studies, n. 7, 10 p., 2003.