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5 papers · 2 filters
D=4 Chiral String Compactifications from Intersecting Branes
G. Aldazabal, S. Franco, L. E. Ibanez +2
Intersecting Dp-branes often give rise to chiral fermions living on their intersections. We study the construction of four-dimensional chiral gauge theories by considering configur…
Vortices and bags in 2+1 dimension
Cesar D. Fosco, Alex Kovner
We consider the effect of the (heavy) fundamental quarks on the low energy effective Lagrangian description of nonabelian gauge theories in 2+1 dimensions. We show that in the pres…
Covariant perturbation theory and the Randall-Sundrum picture
Ezequiel Alvarez, Francisco D. Mazzitelli
The effective action for quantum fields on a -dimensional spacetime can be computed using a non local expansion in powers of the curvature. We show explicitly that, for conforma…
Non local parity transformations and anomalies
M. L. Ciccolini, C. D. Fosco, F. A. Schaposnik
We present an alternative derivation of the parity anomaly for a massless Dirac field in 2+1 dimensions coupled to a gauge field. The anomaly functional, a Chern-Simons action for…
D-Branes at Singularities : A Bottom-Up Approach to the String Embedding of the Standard Model
G. Aldazabal, L. E. Ibanez, F. Quevedo +1
We propose a bottom-up approach to the building of particle physics models from string theory. Our building blocks are Type II D-branes which we combine appropriately to reproduce…