Moduli Stabilisation with Nilpotent Goldstino: Vacuum Structure and SUSY Breaking

We study the effective field theory of KKLT and LVS moduli stabilisation scenarios coupled to an anti-D3-brane at the tip of a warped throat. We describe the presence of the anti-brane in terms of a nilpotent goldstino superfield in a supersymmetric effective field theory. The introduction of this superfield produces a term that can lead to a de Sitter minimum. We fix the Kaehler moduli dependence of the nilpotent field couplings by matching this term with the anti-D3-brane uplifting contribution. The main result of this paper is the computation, within this EFT, of the soft supersymmetry breaking terms in both KKLT and LVS for matter living on D3-brane (leaving the D7-brane analysis to an appendix). A handful of distinct phenomenological scenarios emerge that could have low energy implications, most of them having a split spectrum of soft masses. Some cosmological and phenomenological properties of these models are discussed. We also check that the attraction between the D3-brane and the anti-D3-brane does not affect the leading contribution to the soft masses and does not destabilise the system.Comment: 26+14 pages, 1 figure; references and clarifications added, typos fixe

Presentación

........

Proyecto de nuevo acceso al casco urbano de Fraga a través del Barranco de Sedassers

El presente proyecto es un Trabajo de Final de Carrera que tiene por objeto la redacción de un proyecto constructivo completo que desarrolla la alternativa escogida en un estudio de alternativas realizado previamente. En concreto se describe y justifica el proyecto de un nuevo acceso al casco urbano de Fraga (Huesca) aproximadamente paralelo al cauce del barranco de Sedassers, entre la Sierra de la Concepción y la Autovía del Nordeste A-2 a su paso por Fraga

Comparing natural travel with artificial travel requirements in the study of foraging in the laboratory

Is moving from place to place equivalent to pressing a lever or pecking a key? This dissertation addressed this question by comparing natural travel (moving from place to place) with artificial travel requirements (to press on a lever). In two experiments foraging was modeled with operant behavior. Rats searched for food by pressing on the left lever. The patch provided a maximum of 1, 2, or 8 pellets. When the patch provided 1 pellet, rats captured the first prey with a.10 probability. The probability dropped to zero after one pellet. When the patch provided 2 or 8 pellets rats captured the first prey with a 1.0 probability. Each prey delivered on the left lever caused this probability to decrease to 0 in steps of.5 or.125 simulating patch depletion. Lever-press on the right lever reset the probability on the left lever to.10 or 1.0. To model artificial travel different reset-probabilities were scheduled on the right lever. The experimental situation was modified to model natural travel. Rats had to run 520 cm to travel back and forth between left and right levers. Experiments 1 and 2 revealed that as the number of available prey in the patch increased the giving-up time increased. Experiment 1 showed that natural travel produced longer residence and giving-up times than the artificial travel conditions. Experiment 2 revealed that by pressing on retractable levers, rats made shorter residence and giving-up times than by pressing on standard levers. Sometimes, but not in systematic way, natural travel produced longer residence and giving-up times than by responding to the reset-probabilities. The natural travel with obstacles produced the longest residence and giving-up times. The natural travel with obstacles had more of an effect on residence and giving-up times than any other travel requirement. The residence and giving-up times obtained in Experiments 1 and 2 are in accordance with predictions derived from McNair\u27s (1982) model. As the travel requirement increased the residence and giving-up time increased. This is predicted because the average rate of capture decreased as travel time increased

"A crossroad of national processes". Nationalization and political violence in the basque country, 1937-1978

En las décadas de 1960 y 1970 se produjo una intersección de procesos de nacionalización, uno de signo vasquista y el otro españolista. En ambos jugó un papel esencial la violencia. Ésta se había constituido en referente esencial del promovido por la dictadura, mediante la activación de políticas de memoria ancladas en la exaltación de la victoria en la Guerra Civil como mito fundacional del “Nuevo Estado”. Sin embargo, en el tiempo en que este patriotismo guerrero comenzó a declinar fue cuando el nacionalismo vasco intensificó el suyo al completar su discurso belicista con el activismo armado. Este proceso nacionalizador ascendente se materializó en una primera fase simbólica, que buscó la destrucción del imaginario españolista. A partir de 1968 a esa fase sucedió otra más propiamente asesina, en la que la violencia se amplió a los individuos que representaban esa memoria, intensificándose este proceso diez años después, en plena transición democrática. La memoria abertzale recorrió, así, un camino muy diferente de que definió la memoria colectiva que inspiró el proceso de transición democrática en España.In the 1960s and 1970s Basque and Spanish nationalizing projects overlapped in the Basque Country, with violence exerting a major role in both of them. Franco’s Dictatorship used violence as a prominent tool to promote policies of memory extolling the Civil War as the foundational myth of the “New State”. But when this bellicose patriotism started to wane Basque nationalism created its own version with a belligerent discourse accompanied by a call to arms. This raising nationalistic project had a first and symbolic stage dedicated to destroy the Spanish imaginary. It then, since 1968, evolved into a new and violent phase characterized by the killing of prominent individuals who symbolized that memory. That campaign of violence intensified during the transition to Democracy, helping us to understand why the abertzale memory followed a different path from that of the collective memories recalled to support Spain’s democratic transition

Sequestered de Sitter String Scenarios: Soft-terms

We analyse soft supersymmetry breaking in type IIB de Sitter string vacua after moduli stabilisation, focussing on models in which the Standard Model is sequestered from the supersymmetry breaking sources and the spectrum of soft-terms is hierarchically smaller than the gravitino mass $m_{3/2}$. Due to this feature, these models are compatible with gauge coupling unification and TeV scale supersymmetry with no cosmological moduli problem. We determine the influence on soft-terms of concrete realisations of de Sitter vacua constructed from supersymmetric effective actions. One of these scenarios provides the first study of soft-terms for consistent string models embedded in a compact Calabi-Yau manifold with all moduli stabilised. Depending on the moduli dependence of the Kaehler metric for matter fields and on the mechanism responsible to obtain a de Sitter vacuum, we find two scenarios for phenomenology: (i) a split-supersymmetry scenario where gaugino masses are suppressed with respect to scalar masses: $M_{1/2} \sim m_{3/2} \epsilon \ll m_0 \sim m_{3/2} \sqrt{\epsilon} \ll m_{3/2}$ for $\epsilon \sim m_{3/2}/M_P \ll 1$; (ii) a typical MSSM scenario where all soft-terms are of the same order: $M_{1/2} \sim m_0 \sim m_{3/2} \epsilon \ll m_{3/2}$. Background fluxes determine the numerical coefficients of the soft-terms allowing for small variations of parameters as is necessary to confront data and to interpolate between different scenarios. We comment on different stringy origins of the mu-term and potential sources of desequestering.Comment: 27 pages + appendices, 2 figure

National Deadlock. Hot Nationalism, Dual Identities and Catalan Independence (2008–2019)

The article explores the transformations of Spanish and Catalan national identities and the growth of the pro-independence movement in Catalonia following the 2008 global recession. It argues that the Great Recession provided a new historical context of hot nationalism in which Catalanist narratives of loss and resistance began to ring true to large sectors of Catalan society, whereas the Spanish constitutionalist narratives seemed increasingly outdated. The article also shows the limits of the process of mass nationalization by both the Catalan and the Spanish governments and the eventual ‘crystallization’ of an identity and political divide between pro and anti-independence supporters which split Catalan society down the middle and led to a sort of national identity deadlock.This research was funded by Research group IT-708-13 and MINECO HAR2017–83955-P research projec

UEM-UC3M: An Ontology-based named entity recognition system for biomedical texts

Proceedings of: International Workshop on Semantic Evaluation. SemEval-2013 : Semantic Evaluation Exercises. Took place in 2013 June, 14-15, in Atlanta, Georgia (USA). The event Web site in http://www.cs.york.ac.uk/semeval-2013/Drug name entity recognition focuses on identifying concepts appearing in the text that correspond to a chemical substance used in pharmacology for treatment, cure, prevention or diagnosis of diseases. This paper describes a system based on ontologies for identifying the chemical substances in biomedical text. The system achieves an F-1 measure of 0.529 in the task.This work has been funded by MA2VICMR project (S2009/TIC-1542) and MULTIMEDICA project12 (TIN 2010-20644-C03-01).Publicad