Penrose Limit and String Theories on Various Brane Backgrounds
Abstract
We investigate the Penrose limit of various brane solutions including Dpbranes, NS5branes, fundamental strings, (p,q) fivebranes and (p,q) strings. We obtain special null geodesics with the fixed radial coordinate (critical radius), along which the Penrose limit gives string theories with constant mass. We also study string theories with timedependent mass, which arise from the Penrose limit of the brane backgrounds. We examine equations of motion of the strings in the asymptotic flat region and around the critical radius. In particular, for (p,q) fivebranes, we find that the string equations of motion in the directions with the B field are explicitly solved by the spheroidal wave functions.
 Publication:

Journal of High Energy Physics
 Pub Date:
 November 2002
 DOI:
 10.1088/11266708/2002/11/005
 arXiv:
 arXiv:hepth/0209004
 Bibcode:
 2002JHEP...11..005F
 Keywords:

 High Energy Physics  Theory
 EPrint:
 41 pages, Latex, minor corrections