2011-06-16 11:18 |
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2011-05-24 10:56 |
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2011-05-23 17:30 |
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2011-05-23 17:30 |
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2011-05-19 17:48 |
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2011-05-19 13:28 |
FCNC Effects in a Minimal Theory of Fermion Masses
/ Buras, Andrzej J. (Munich, Tech. U. ; TUM-IAS, Munich) ; Grojean, Christophe (CERN ; Saclay, SPhT) ; Pokorski, Stefan (TUM-IAS, Munich ; CERN ; Warsaw U.) ; Ziegler, Robert (Munich, Tech. U. ; TUM-IAS, Munich)
As a minimal theory of fermion masses we extend the SM by heavy vectorlike fermions, with flavor-anarchical Yukawa couplings, that mix with chiral fermions such that small SM Yukawa couplings arise from small mixing angles. This model can be regarded as an effective description of the fermionic sector of a large class of existing flavor models and thus might serve as a useful reference frame for a further understanding of flavor hierarchies in the SM. [...]
arXiv:1105.3725; CERN-PH-TH-2011-117; FLAVOUR(267104)-ERC-1; TUM-HEP-807-11; CERN-PH-TH-2011-117; FLAVOUR(267104)-ERC-1; TUM-HEP-807-11.-
2011 - 19 p.
- Published in : JHEP 08 (2011) 028
Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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2011-05-18 13:27 |
Non-perturbative transitions among intersecting-brane vacua
/ Angelantonj, Carlo ; Condeescu, Cezar ; Dudas, Emilian ; Pradisi, Gianfranco
We investigate the transmutation of D-branes into Abelian magnetic backgrounds on the world-volume of higher-dimensional branes, within the framework of global models with compact internal dimensions. The phenomenon, T-dual to brane recombination in the intersecting-brane picture, shares some similarities to inverse small-instanton transitions in non-compact spaces, though in this case the Abelian magnetic background is a consequence of the compactness of the internal manifold, and is not ascribed to a zero-size non-Abelian instanton growing to maximal size. [...]
arXiv:1105.3465.-
2011 - 52 p.
- Published in : JHEP 07 (2011) 123
Fulltext from publisher: PDF; External link: Preprint
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2011-05-18 13:27 |
On Fluxed Instantons and Moduli Stabilisation in IIB Orientifolds and F-theory
/ Grimm, Thomas W (Munich, Max Planck Inst.) ; Kerstan, Max (Heidelberg U.) ; Palti, Eran (Ecole Polytechnique, CPHT) ; Weigand, Timo (Heidelberg U.)
We study the superpotential induced by Euclidean D3-brane instantons carrying instanton flux, with special emphasis on its significance for the stabilisation of Kahler moduli and Neveu-Schwarz axions in Type IIB orientifolds. Quite generally, once a chiral observable sector is included in the compactification, arising on intersecting D7-branes with world-volume flux, resulting charged instanton zero modes prevent a class of instantons from participating in moduli stabilisation. [...]
arXiv:1105.3193.-
2011 - 9 p.
- Published in : Phys. Rev. D 84 (2011) 066001
External link: Preprint
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2011-05-17 13:12 |
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