Zobrazeno 1 - 10
of 168
pro vyhledávání: '"Serone, M."'
Autor:
Scrucca, C. A., Serone, M.
Publikováno v:
Int.J.Mod.Phys. A19 (2004) 2579-2642
We give an overview of the issue of anomalies in field theories with extra dimensions. We start by reviewing in a pedagogical way the computation of the standard perturbative gauge and gravitational anomalies on non-compact spaces, using Fujikawa's a
Externí odkaz:
http://arxiv.org/abs/hep-th/0403163
Publikováno v:
JHEP 0402:049,2004
Six-dimensional orbifold models where the Higgs field is identified with some internal component of a gauge field are considered. We classify all possible T^2/Z_N orbifold constructions based on a SU(3) electroweak gauge symmetry. Depending on the or
Externí odkaz:
http://arxiv.org/abs/hep-th/0312267
Autor:
Serone, M., Trapletti, M.
Publikováno v:
JHEP 0401 (2004) 012
A precise correspondence between freely-acting orbifolds (Scherk-Schwarz compactifications) and string vacua with NSNS flux turned on is established using T-duality. We focus our attention to a certain non-compact Z_2 heterotic freely-acting orbifold
Externí odkaz:
http://arxiv.org/abs/hep-th/0310245
Publikováno v:
Nucl.Phys. B653 (2003) 85-108
We study the quantum stability of Type IIB orbifold and orientifold string models in various dimensions, including Melvin backgrounds, where supersymmetry (SUSY) is broken {\it \`a la} Scherk-Schwarz (SS) by twisting periodicity conditions along a ci
Externí odkaz:
http://arxiv.org/abs/hep-th/0210075
Publikováno v:
Phys.Rev. D66 (2002) 105028
We discuss the generalization to global gauge anomalies of the familiar procedure for the cancellation of local gauge anomalies in effective theories of spontaneously broken symmetries. We illustrate this mechanism in a recently proposed six-dimensio
Externí odkaz:
http://arxiv.org/abs/hep-th/0207013
Publikováno v:
Nucl.Phys.B635:33-56,2002
We study examples of chiral four-dimensional IIB orientifolds with Scherk--Schwarz supersymmetry breaking, based on freely acting orbifolds. We construct a new Z3xZ3' model, containing only D9-branes, and rederive from a more geometric perspective th
Externí odkaz:
http://arxiv.org/abs/hep-th/0203190
Publikováno v:
Phys.Lett. B525 (2002) 169-174
We study the constraints on models with extra dimensions arising from local anomaly cancellation. We consider a five-dimensional field theory with a U(1) gauge field and a charged fermion, compactified on the orbifold S^1/(Z_2 x Z_2'). We show that,
Externí odkaz:
http://arxiv.org/abs/hep-th/0110073
Publikováno v:
Phys.Rev.Lett.87:251601,2001
Scherk-Schwarz gauge symmetry breaking of a D-dimensional field theory model compactified on a circle is analyzed. It is explicitly shown that forbidden couplings in the unbroken theory appear in the one-loop effective action only in a non-local way,
Externí odkaz:
http://arxiv.org/abs/hep-ph/0107201
Publikováno v:
Nucl.Phys. B559 (1999) 184-204
The leading eikonal S-matrix for three graviton scattering in d=11 supergravity and Matrix Theory are shown to precisely agree. The result unifies the source-probe plus recoil approach of Okawa and Yoneya and relaxes the restriction imposed by those
Externí odkaz:
http://arxiv.org/abs/hep-th/9905183
Publikováno v:
Fortsch.Phys.48:191-194,2000
We briefly review the computation of graviton and antisymmetric tensor scattering amplitudes in Matrix Theory from a diagramatic S-Matrix point of view.
Comment: 4 pages, LaTeX, uses axodraw.sty; to appear in the Proceedings of the 32nd Symposiu
Comment: 4 pages, LaTeX, uses axodraw.sty; to appear in the Proceedings of the 32nd Symposiu
Externí odkaz:
http://arxiv.org/abs/hep-th/9903099