Berkovits, Nathan [UNESP]2014-05-272014-05-272001-12-01Journal of High Energy Physics. New York: Springer, n. 8, 26 p., 2001.1029-8479http://hdl.handle.net/11449/66650Recently, the superstring was covariantly quantized using the BRST-like operator Q = ∮ λαdα where λα is a pure spinor and dα are the fermionic Green-Schwarz constraints. By performing a field redefinition and a similarity transformation, this BRST-like operator is mapped to the sum of the Ramond-Neveu-Schwarz BRST operator and η0 ghost. This map is then used to relate physical vertex operators and tree amplitudes in the two formalisms. Furthermore, the map implies the existence of a b ghost in the pure spinor formalism which might be useful for loop amplitude computations.engBRST SymmetrySuperstrings and Heterotic StringsArtigo10.1088/1126-6708/2001/08/026WOS:000174170100026Acesso restrito2-s2.0-33745023393