N = 2 superconformal description of superstring in Ramond-Ramond plane wave backgrounds
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2002-10-01
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Using the U(4) formalism developed ten years ago, the worldsheet action for the superstring in Ramond-Ramond plane wave backgrounds is expressed in a manifestly N = (2,2) superconformally invariant manner. This simplifies the construction of consistent Ramond-Ramond plane wave backgrounds and eliminates the problems associated with light-cone interaction point operators. © SISSA/ISAS 2002.
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Penrose limit and pp-wave background, Superstrings and Heterotic Strings
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Journal of High Energy Physics, v. 6, n. 10, p. 1327-1341, 2002.