20110616 11:18 
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20110524 10:56 
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20110523 17:30 
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20110523 17:30 
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20110519 17:48 
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20110519 13:28 
FCNC Effects in a Minimal Theory of Fermion Masses
/ Buras, Andrzej J (Munich, Tech. U. ; TUMIAS, Munich) ; Grojean, Christophe (CERN ; Saclay, SPhT) ; Pokorski, Stefan (Warsaw U. ; CERN ; TUMIAS, Munich) ; Ziegler, Robert (Munich, Tech. U. ; TUMIAS, Munich)
As a minimal theory of fermion masses we extend the SM by heavy vectorlike fermions, with flavoranarchical 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; CERNPHTH2011117; FLAVOUR(267104)ERC1; TUMHEP80711.
2011  19 p.
 Published in : J. High Energy Phys. 08 (2011) 028
Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint

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20110518 13:27 
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20110518 13:27 
On Fluxed Instantons and Moduli Stabilisation in IIB Orientifolds and Ftheory
/ 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 D3brane instantons carrying instanton flux, with special emphasis on its significance for the stabilisation of Kahler moduli and NeveuSchwarz axions in Type IIB orientifolds. Quite generally, once a chiral observable sector is included in the compactification, arising on intersecting D7branes with worldvolume 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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20110517 13:12 
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20110517 13:12 
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