أعرض تسجيلة المادة بشكل مبسط

dc.creator Antusch, Stefan
dc.creator Ibáñez, Luis E.
dc.creator Macri, Tommaso
dc.date 2008-07-02T11:10:12Z
dc.date 2008-07-02T11:10:12Z
dc.date 2007-06-14
dc.date.accessioned 2017-01-31T02:18:57Z
dc.date.available 2017-01-31T02:18:57Z
dc.identifier arXiv:0706.2132v1 [hep-ph]
dc.identifier JHEP 09 (2007) 087
dc.identifier http://dx.doi.org/10.1088/1126-6708/2007/09/087
dc.identifier 1029-8479
dc.identifier http://hdl.handle.net/10261/5523
dc.identifier 10.1088/1126-6708/2007/09/087
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/10261/5523
dc.description 24 pages, 2 figures.-- Published in: JHEP09(2007)087.
dc.description We study possible patterns of neutrino masses and mixings in string models in which Majorana neutrino masses are generated by a certain class of string theory instantons recently considered in the literature. These instantons may generate either directly the dim=5 Weinberg operator or right-handed neutrino Majorana masses, both with a certain flavour-factorised form. A hierarchy of neutrino masses naturally appears from the exponentially suppressed contributions of different instantons. The flavour structure is controlled by string amplitudes involving neutrino fields and charged instanton zero modes. For some simple choices for these amplitudes one finds neutrino mixing patterns consistent with experimental results. In particular, we find that a tri-bimaximal mixing pattern is obtained for simple symmetric values of the string correlators.
dc.description This work has been partially supported by the European Commission under the RTN European Program MRTN-CT-2004-503369, the CICYT (Spain), and the Comunidad de Madrid under project HEPHACOS, P-ESP-00346.
dc.format 277355 bytes
dc.format application/pdf
dc.language eng
dc.publisher Institute of Physics Publishing
dc.relation IFT-UAM/CSIC 07-35
dc.relation Preprint
dc.rights openAccess
dc.subject Nonperturbative Effects
dc.subject Superstring Vacua
dc.subject Neutrino Physics
dc.subject Intersecting branes models
dc.subject High Energy Physics - Phenomenology
dc.subject High Energy Physics - Theory
dc.title Neutrino Masses and Mixings from String Theory Instantons
dc.type Pre-print


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