Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2010-09-20
Nucl.Phys.B845:340-380,2011
Physics
High Energy Physics
High Energy Physics - Theory
49 pages; v2 corrected references and minor typos; v3 minor typos corrected, version to appear in NPB
Scientific paper
10.1016/j.nuclphysb.2010.12.009
We derive pomeron vertex operators for bosonic strings and superstrings in the presence of D-branes. We demonstrate how they can be used in order to compute the Regge behavior of string amplitudes on D-branes and the amplitude of ultrarelativistic D-brane scattering. After a lightning review of the BCFW method, we proceed in a classification of the various BCFW shifts possible in a field/string theory in the presence of defects/D-branes. The BCFW shifts present several novel features, such as the possibility of performing single particle momentum shifts, due to the breaking of momentum conservation in the directions normal to the defect. Using the pomeron vertices we show that superstring amplitudes on the disc involving both open and closed strings should obey BCFW recursion relations. As a particular example, we analyze explicitly the case of 1 -> 1 scattering of level one closed string states off a D-brane. Finally, we investigate whether the eikonal Regge regime conjecture holds in the presence of D-branes.
Fotopoulos Angelos
Prezas Nikolaos
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