Physical state representations and gauge fixing in string theory

Journal of High Energy Physics (Impact Factor: 6.22). 09/2005; DOI: 10.1088/1126-6708/2005/11/033
Source: arXiv

ABSTRACT We re-examine physical state representations in the covariant quantization of bosonic string. We especially consider one parameter family of gauge fixing conditions for the residual gauge symmetry due to null states (or BRST exact states), and obtain explicit representations of observable Hilbert space which include those of the DDF states. This analysis is aimed at giving a necessary ingredient for the complete gauge fixing procedures of covariant string field theory such as temporal or light-cone gauge. Comment: 16 pages

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    ABSTRACT: A single-parameter family of covariant gauge fixing conditions in bosonic string field theory is proposed. It is a natural string field counterpart of the covariant gauge in the conventional gauge theory, which includes the Landau gauge as well as the Feynman (Siegel) gauge as special cases. The action in the Landau gauge is largely simplified in such a way that numerous component fields have no derivatives in their kinetic terms and appear in at most quadratic in the vertex.
    Progress of Theoretical Physics 12/2006; · 2.06 Impact Factor

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