F. Brandt et al., COHOMOLOGICAL ANALYSIS OF BOSONIC D-STRINGS AND 2D SIGMA-MODELS COUPLED TO ABELIAN GAUGE-FIELDS, Nuclear physics. B, 523(3), 1998, pp. 623-662
We analyze completely the BRST cohomology on local functionals for two
-dimensional sigma models coupled to abelian world-sheet gauge fields,
including effective bosonic D-string models described by Born-Infeld
actions. In particular we prove that the rigid symmetries of such mode
ls are exhausted by the solutions to generalized Killing vector equati
ons which we have presented recently, and provide all the consistent f
irst order deformations and candidate gauge anomalies of the models un
der study. For appropriate target space geometries we find nontrivial
deformations both of the abelian gauge transformations and of the worl
d-sheet diffeomorphisms, and antifield-dependent candidate anomalies f
or both types of symmetries separately, as well as mixed ones. (C) 199
8 Elsevier Science B.V.