String Field Equations from Generalized Sigma Model

Details String Field Equations from Generalized Sigma Model String Field Equations from Generalized Sigma Model

1997-01-29

arxiv.org/abs/hep-th/9701171v1

Nucl.Phys. B505 (1997) 463-496

Physics

High Energy Physics

High Energy Physics - Theory

harvmac big, 39 pages Full postscript available from http://theor1.lbl.gov/www/theorygroup/papers/39854.ps

Scientific paper

10.1016/S0550-3213(97)00320-9

We propose a new approach for deriving the string field equations from a general sigma model on the world sheet. This approach leads to an equation which combines some of the attractive features of both the renormalization group method and the covariant beta function treatment of the massless excitations. It has the advantage of being covariant under a very general set of both local and non-local transformations in the field space. We apply it to the tachyon, massless and first massive level, and show that the resulting field equations reproduce the correct spectrum of a left-right symmetric bosonic string.

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