INVESTIGADORES
ZEMBA Guillermo Raul
artículos
Título:
Tadpole graph in covariant closed string field theory
Autor/es:
GUILLERMO ZEMBA, BARTON ZWIEBACH
Revista:
JOURNAL OF MATHEMATICAL PHYSICS
Editorial:
AMER INST PHYSICS
Referencias:
Lugar: New York, EEUU; Año: 1989 vol. 30 p. 2388 - 2395
ISSN:
0022-2488
Resumen:
A one‐loop tadpole graph in covariant closed string field theory must
generate all inequivalent tori with one puncture. In order to determine
the region of integration in moduli space we map the tadpole to a
two‐sheeted sphere and use the analyticity of the modular parameter
with respect to the complex propagator parameter. It is shown that the
naive closed string extension of the Witten open string vertex fails to
give the correct modular region for this one‐loop amplitude.
