The N = 2 Open String
نویسنده
چکیده
We show that the N = 2 open string describes a theory of self-dual Yang Mills (SDYM) in (2, 2) dimensions. The coupling to the closed sector is described by SDYM in a Kähler background, with the Yang-Mills fields providing a source term to the self-duality equation in the gravity sector. The four-point S-matrix elements of the theory vanish, so the tree-level unitarity constraints leading to the Chan-Paton construction are relaxed. By considering more general group-theory ansätze theN = 2 string can be written for any gauge group, and not just the classical groups allowed for the bosonic and N = 1 strings. Such ad hoc group-theory factors can not be appended to the closed N = 2 string, explaining why the Z n closed N = 2 strings are trivial extensions of the Z 1 theory. Work supported in part by the US-Israel Binational Science Foundation, and the Israel Academy of Science. E-Mail: [email protected].
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تاریخ انتشار 1992