### Families of N=2 StringsFamilies of N=2 Strings

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 Author Cheung, Yeuk-Kwan E. ♦ Oz, Yaron ♦ Yin, Zheng Source arXiv.org Content type Text File Format PDF Date of Submission 2002-11-15 Language English
 Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Mathematics ♦ Physics Subject Keyword High Energy Physics - Theory ♦ Mathematical Physics ♦ Mathematics - Differential Geometry ♦ math ♦ physics:hep-th ♦ physics:math-ph Abstract In a given 4d spacetime bakcground, one can often construct not one but a family of distinct N=2 string theories. This is due to the multiple ways N=2 superconformal algebra can be embedded in a given worldsheet theory. We formulate the principle of obtaining different physical theories by gauging different embeddings of the same symmetry algebra in the same pre-theory.'' We then apply it to N=2 strings and formulate the recipe for finding the associated parameter spaces of gauging. Flat and curved target spaces of both (4,0) and (2,2) signatures are considered. We broadly divide the gauging choices into two classes, denoted by alpha and beta, and show them to be related by T-duality. The distinction between them is formulated topologically and hinges on some unique properties of 4d manifolds. We determine what their parameter spaces of gauging are under certain simplicity ansatz for generic flat spaces (R^4 and its toroidal compactifications) as well as some curved spaces. We briefly discuss the spectra of D-branes for both alpha and beta families. Description Reference: JHEP 0311:026,2003 Educational Use Research Learning Resource Type Article Page Count 661