INVESTIGADORES
LUGO Adrian Rene
artículos
Título:
Vertex operators for the closed bosonic string theory at arbitray genus in the operator formalism
Autor/es:
ADRIAN R. LUGO
Revista:
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
Editorial:
WORLD SCIENTIFIC PUBL CO PTE LTD
Referencias:
Año: 1990 vol. 05 p. 2391 - 2409
ISSN:
0217-751X
Resumen:
A systematic procedure for constructing vertex operators for the physical states of the closed bosonic string theory at genus g in the operator formalism is presented. The method is based on imposing suitable commutation relations with the generators of the conformal transformations required by unitarity of scattering amplitudes. An Arakelov-type metric on the Riemann surface naturally arises in the case of the tachyon, which allows to define vertex operators at higher levels via covariant derivatives. They involve covariant derivatives of the curvature with respect to this metric as it happens in the path integral approach. As a particular result, the Fradkin-Tseytlin dilaton coupling is obtained.