Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Nilles, H. P."'
Publikováno v:
Phys.Lett.B652:124-127,2007
The existence of multiple anomalous U(1)s is demonstrated explicitly in a blow-up version of a heterotic Z_3 orbifold. Another blow-up of the same orbifold supports further evidence for the type-I/heterotic duality in four dimensions. It has a single
Externí odkaz:
http://arxiv.org/abs/hep-th/0703211
Publikováno v:
JHEP0411:076,2004
We extend the KKLT approach to moduli stabilization by including the dilaton and the complex structure moduli into the effective supergravity theory. Decoupling of the dilaton is neither always possible nor necessary for the existence of stable minim
Externí odkaz:
http://arxiv.org/abs/hep-th/0411066
Publikováno v:
Nucl.Phys.B677:405-429,2004
We re-consider the self tuning idea in brane world models of finite volume. We notice that in a large class of self tuning models, the four dimensional physics is sensitive to the vacuum energy on the brane. In particular the compactification volume
Externí odkaz:
http://arxiv.org/abs/hep-th/0309042
Publikováno v:
Nucl.Phys.B665:236-272,2003
We investigate the properties of localized anomalous U(1)'s in heterotic string theory on the orbifold T^6/Z_3. We argue that the local four dimensional and original ten dimensional Green-Schwarz mechanisms can be implemented simultaneously, making t
Externí odkaz:
http://arxiv.org/abs/hep-th/0303101
Autor:
Nibbelink, S. Groot, Nilles, H. P.
In this talk we discus some properties of supersymmetric theories on orbifolds in five dimensions. The structure of FI--tadpoles may lead to (strong) localization of charged bulk scalars. Orbifold theories may suffer from various kinds of anomalies.
Externí odkaz:
http://arxiv.org/abs/hep-ph/0210338
Publikováno v:
Nucl.Phys.B648:35-68,2003
Recently spatially localized anomalies have been considered in higher dimensional field theories. The question of the quantum consistency and stability of these theories needs further discussion. Here we would like to investigate what string theory m
Externí odkaz:
http://arxiv.org/abs/hep-th/0208146
Publikováno v:
Acta Phys.Polon.B33:2435,2002
We investigate the phenomenon of brane induced supersymmetry breakdown on orbifolds in the presence of a Scherk-Schwarz mechanism. General consistency conditions are derived for arbitrary dimensions and the results are illustrated in the specific exa
Externí odkaz:
http://arxiv.org/abs/hep-th/0205166
Publikováno v:
Nucl.Phys.B640:171-201,2002
Bulk matter modes of higher dimensional models generically become unstable in the presence of additional matter multiplets at the branes. This quantum instability is driven by localized Fayet-Iliopoulos terms that attract the bulk zero modes towards
Externí odkaz:
http://arxiv.org/abs/hep-th/0205012
Autor:
Ghilencea, D. M., Nilles, H. P.
Publikováno v:
J.Phys.G28:2475-2486,2002
We analyze the ultraviolet stability of the Higgs mass in recently proposed Kaluza-Klein models compactified on S_1/Z_2 or S_1/(Z_2\times Z_2'), both at the field theory and string theory level. Fayet-Iliopoulos terms of U(1) hypercharge are shown to
Externí odkaz:
http://arxiv.org/abs/hep-ph/0204261
Publikováno v:
Phys.Lett.B536:270-276,2002
We study models compactified on S^1/Z_2 with bulk and brane matter fields charged under U(1) gauge symmetry. We calculate the FI-terms and show by minimizing the resulting potential that supersymmetry or gauge symmetry is spontaneously broken if the
Externí odkaz:
http://arxiv.org/abs/hep-th/0203055