https://doi.org/10.1140/epjc/s10052-007-0474-5
Regular Article - Theoretical Physics
Worldsheet instantons and a null string limit of Born–Infeld theory
1
Departments of Mathematics and Physics, Rutgers University, Busch Campus, Piscataway, New Jersey, 08854, USA
2
Department of Physics, King’s College London, Strand, London, WC2R 2LS, UK
3
Department of Mathematics and Maxwell Institute for Mathematical Sciences, Heriot-Watt University, Colin Maclaurin Building, Riccarton, Edinburgh, EH14 4AS, UK
* e-mail: R.J.Szabo@ma.hw.ac.uk
Received:
5
April
2007
Published online:
8
December
2007
For a superstring theory in four spacetime dimensions, we propose a modification of the Born–Infeld action that possesses a well-defined tensionless limit. We interpret this as describing the effective target space dynamics of null strings on a D3-brane. We argue that such a modification can be induced by nonperturbative contributions from instantons in the worldsheet σ-model describing string propagation on the brane.
© Springer-Verlag , 2008