The Neutrino Suppression Scale from Large Volumes

We present an argument in which the scale ~ 0.1 eV associated with neutrino masses naturally appears in a a class of (very) large volume compactifications, being tied to a supersymmetry scale of 10^3 GeV and a string scale of 10^11 GeV. The masses are of Majorana type and there is no right-handed neutrino within the low-energy field theory. The suppression scale 10^14 GeV is independent of the masses of the heavy states that are integrated out. These kind of constructions appear naturally in Type IIB flux compactifications. However, the arguments that lead to this result rely only on a few geometrical features of the compactification manifold, and hence can be used independently of string theory.Comment: 4 pages, RevTeX; v2. matches journal versio

Los impactos sociales de la lectura

En su intervención en este panel del Área de Didácti ca de la Lengua y la Literatura, Raúl Cremades explicó su experiencia en la creación de la Fundación Alonso Quijano para el fomento de la lectura . Posteriormente, habló del peligro de la sacralización de los libros y la lectura a través de las ideas principales de los textos de Daniel Pennac ( Como una novela , 1992), de Pierre Bayard ( Cómo hablar de los libros que no se han leído , 2007) y de Nikita Brottman ( Contra la lectura , 2018 ). Finalmente habló de la importancia de los mediadores (nuevos y tradi cionales) y comentó algunos ejemplos de la función terapéutica de la lecturaUniversidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Kahler Potentials of Chiral Matter Fields for Calabi-Yau String Compactifications

The Kahler potential is the least understood part of effective N=1 supersymmetric theories derived from string compactifications. Even at tree-level, the Kahler potential for the physical matter fields, as a function of the moduli fields, is unknown for generic Calabi-Yau compactifications and has only been computed for simple toroidal orientifolds. In this paper we describe how the modular dependence of matter metrics may be extracted in a perturbative expansion in the Kahler moduli. Scaling arguments, locality and knowledge of the structure of the physical Yukawa couplings are sufficient to find the relevant Kahler potential. Using these techniques we compute the `modular weights' for bifundamental matter on wrapped D7 branes for large-volume IIB Calabi-Yau flux compactifications. We also apply our techniques to the case of toroidal compactifications, obtaining results consistent with those present in the literature. Our techniques do not provide the complex structure moduli dependence of the Kahler potential, but are sufficient to extract relevant information about the canonically normalised matter fields and the soft supersymmetry breaking terms in gravity mediated scenarios.Comment: JHEP style, 24 pages, 4 figures. v2: New section and reference adde

Evaluación de webs de bibliotecas escolares

Taller de Evaluación de webs de bibliotecas escolares: 1.- Presentación y debate inicial. 2.- Primera actividad: Evaluación de webs de bibliotecas escolares reales según el modelo de Cremades (2013). 3.- Segunda actividad:Evaluación de webs de bibliotecas escolares reales según el modelo de González y Faba (2014). 4.- Conclusiones.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tec