N=1 MATTER FROM FRACTIONAL BRANES

Authors :: Raffaele Marotta
F. Nicodemi
R. Pettorino
Francesco Sannino
Franco Pezzella
Marotta, R
Nicodemi, Francesco
Pettorino, R
Pezzella, F
Sannino, F.
R., Marotta
F., Nicodemi
Pettorino, Roberto
F., Pezzella
F., Sannino
Publication Year :: 2002
Publisher :: Societa Italiana di Fisica:Via Saragozza 12 Subs Service, I 40123 Bologna Italy:011 39 051 331554, EMAIL: sif@sif.it, INTERNET: http://www.sif.it, Fax: 011 39 051 581340 SISSA, Scuola internazionale superiore di studi avanzati, 2002.
Abstract: We study a bound state of fractional D3-branes localized inside the world-volume of fractional D7-branes on the orbifold C^3/Z_2 x Z_2. We determine the open string spectrum that leads to N=1 U(N1)xU(N2)xU(N3)xU(N4) gauge theory with matter having the number of D7-branes as a flavor index. We derive the linearized boundary action of the D7-brane on this orbifold using the boundary state formalism and we discuss the tadpole cancellation. After computing the asymptotic expression of the supergravity solution the anomalies of the gauge theory are reproduced.<br />Comment: LaTeX 20 pages, 1 figure, small changes and references added