Top Quark Mass Calibration for Monte Carlo Event Generators -- An Update

We generalize and update our former top quark mass calibration framework for Monte Carlo (MC) event generators based on the $e^+e^-$ hadron-level 2-jettiness $\tau_2$ distribution in the resonance region for boosted $t\bar t$ production, that was used to relate the PYTHIA 8.205 top mass parameter $m_t^{\rm MC}$ to the MSR mass $m_t^{\rm MSR}(R)$ and the pole mass $m_t^{\rm pole}$. The current most precise direct top mass measurements specifically determine $m_t^{\rm MC}$. The updated framework includes the addition of the shape variables sum of jet masses $\tau_s$ and modified jet mass $\tau_m$, and the treatment of two more gap subtraction schemes to remove the ${\cal O}(\Lambda_{\rm QCD})$ renormalon related to large-angle soft radiation. These generalizations entail implementing a more versatile shape-function fit procedure and accounting for a certain type of $(m_t/Q)^2$ power corrections to achieve gap-scheme and observable independent results. The theoretical description employs boosted heavy-quark effective theory (bHQET) at next-to-next-to-logarithmic order (N$^2$LL), matched to soft-collinear effective theory (SCET) at N$^2$LL and full QCD at next-to-leading order (NLO), and includes the dominant top width effects. Furthermore, the software framework has been modernized to use standard file and event record formats. We update the top mass calibration results by applying the new framework to PYTHIA 8.205, HERWIG 7.2 and SHERPA 2.2.11. Even though the hadron-level resonance positions produced by the three generators differ significantly for the same top mass parameter $m_t^{\rm MC}$ value, the calibration shows that these differences arise from the hadronization modeling. Indeed, we find that $m_t^{\rm MC}$ agrees with m_t^{\rm MSR}(1\,\mbox{GeV}) within $200$ MeV for the three generators and differs from the pole mass by $350$ to $600$ MeV.Comment: 70 pages, 15 figure

Oracion funebre panegyrica historica : el remedo espiritual de la esposa de Salomon la Ven. Madre Sor Cathalina de S. Thomas de Villanueua ...

Copia digital. Madrid : Ministerio de Cultura. Subdirección General de Coordinación Bibliotecaria, 2006Sign.: ¶\p3\s, 2¶\p4\s, A-L\p4\sPort. con orla tip.Error de pag., de p. 80 pasa a la 8

Hidrogeologia de les Illes Balears: Les Masses d'aigua càrstiques

[cat] Les aigües subterrànies suposen el 95% dels recursos hídrics de les Illes Balears. Degut a la configuració litològica de l’arxipèlag, la majoria de les aigües subterrànies es localitzen en aqüífers carbonatats que en gran part presenten característiques càrstiques més o menys desenvolupades. De fet 64 de les 90 masses d’aigua subterrànies definides en el Pla Hidrològic de les Illes Balears de 2011 tenen característiques càrstiques. Aquestes masses d’aigua ocupen el 69% de la superfície a Mallorca, el 68% a Menorca, el 67% a Eivissa i el 100% a Formentera. Les particularitats dels aqüífers càrstics fan que la seva gestió sigui més complexa que la dels aqüífers de flux difús. Així degut a que la velocitat d’infiltració i circulació de l’aigua dins d’un aqüífer càrstic sol ser elevada, quan es vol establir la vulnerabilitat a la contaminació d’un aqüífer càrstic és recomanable tenir en consideració el desenvolupament del carst. El mateix ocorre amb els perímetres de protecció de pous de proveïment, el càlcul dels quals s’ha de realitzar amb metodologies diferents a les dels aqüífers de flux difús. L’explotació dels aqüífers càrstics pot accelerar els processos naturals com l’aparició de col·lapses. A Mallorca l’explotació intensiva i estacional de l’aqüífer de Crestatx ha provocat l’aparició de col·lapses que han afectat infraestructures urbanes. D’altra banda a Menorca el descens continuat dels nivells freàtics a l’aqüífer d’Es Migjorn ha accelerat l’aparició de col·lapses que han afectat la qualitat de les aigües d’un pou de proveïment de Es Migjorn Gran.[spa] Las aguas subterráneas suponen el 95% de los recursos hídricos de las Baleares. Debido a la configuración litológica del archipiélago, la mayoría de las aguas subterráneas se localizan en acuíferos carbonatados con características kársticas más o menos desarrolladas. De hecho 64 de las 90 masas de agua subterráneas definidas en el Plan Hidrológico de las Islas Baleares de 2011 tienen características kársticas. Estas masas de agua ocupan el 69% de la superficie en Mallorca, el 68% en Menorca, el 67% en Eivissa y el 100% en Formentera. Las particularidades de los acuíferos kársticos hacen que su gestión sea más compleja que la del resto de acuíferos. Debido a la elevada velocidad de infiltración y circulación del agua en un acuífero kárstico, cuando se quiere establecer la vulnerabilidad a la contaminación de este tipo de acuíferos es recomendable considerar el grado de desarrollo del karst. Lo mismo ocurre con los perímetros de protección de pozos de abastecimiento, el establecimiento de los cuales debe realizarse con metodologías diferentes a las de los acuíferos de flujo difuso. La explotación de los acuíferos kársticos puede acelerar procesos naturales como la aparición de colapsos. En Mallorca la explotación intensiva y estacional del acuífero de Crestatx ha provocado la aparición de colapsos que han afectado infraestructuras urbanas. En Menorca el descenso generalizado de los niveles freáticos en el acuífero de Es Migjorn ha acelerado la aparición de colapsos que han afectado la calidad de las aguas de un pozo de abastecimiento de Es Migjorn Gran.[eng] Groundwaters account for 95% of the water resources in the Balearic Islands. Owing to the lithological configuration of the archipelago, the majority of groundwater aquifers are located in carbonate groundwater bodies with more or less developed karst features. In fact 64 of the 90 groundwater bodies identified in the Balearic Islands Hydrological Plan of 2011 have karst properties. These water bodies occupy 69% of the surface in Mallorca, 68% in Menorca, 67% in Eivissa and 100% in Formentera. The particularities of karst aquifers makes their management more complex than the other aquifers. Due to the high infiltration rate and water circulation in karst aquifers, when establishing the contamination vulnerability of these type of aquifers is recommended to consider the degree of karst development. The same occurs with the protection perimeters of supply wells, the establishment of which should be done with methods different from the used for diffuse flux aquifers. The exploitation of karst aquifers can accelerate natural processes such as the occurrence of collapses. In Mallorca the intensive and seasonal exploitation of the Crestatx aquifer has caused the appearance of collapses that have affected urban infrastructures. In Menorca the general decline of groundwater levels in the Migjorn aquifer has accelerated the occurrence of collapses that have affected the quality of the water from a well supply in Es Migjorn Gran

An explicit link between Gaussian fields and Gaussian Markov random fields: the stochastic partial differential equation approach

Continuously indexed Gaussian fields (GFs) are the most important ingredient in spatial statistical modelling and geostatistics. The specification through the covariance function gives an intuitive interpretation of the field properties. On the computational side, GFs are hampered with the big n problem, since the cost of factorizing dense matrices is cubic in the dimension. Although computational power today is at an all time high, this fact seems still to be a computational bottleneck in many applications. Along with GFs, there is the class of Gaussian Markov random fields (GMRFs) which are discretely indexed. The Markov property makes the precision matrix involved sparse, which enables the use of numerical algorithms for sparse matrices, that for fields in R-2 only use the square root of the time required by general algorithms. The specification of a GMRF is through its full conditional distributions but its marginal properties are not transparent in such a parameterization. We show that, using an approximate stochastic weak solution to (linear) stochastic partial differential equations, we can, for some GFs in the Matern class, provide an explicit link, for any triangulation of R-d, between GFs and GMRFs, formulated as a basis function representation. The consequence is that we can take the best from the two worlds and do the modelling by using GFs but do the computations by using GMRFs. Perhaps more importantly, our approach generalizes to other covariance functions generated by SPDEs, including oscillating and non-stationary GFs, as well as GFs on manifolds. We illustrate our approach by analysing global temperature data with a non-stationary model defined on a sphere

100 años investigando el mar. El IEO en su centenario (1914-2014).

Se trata de un libro que pretende divulgar a la sociedad las principales investigaciones multidisciplinares llevadas a cabo por el Instituto Español de Oceanografía durante su primer siglo de vida, y dar a conocer la historia del organismo, de su Sede Central y de los nueve centros oceanográficos repartidos por los litorales mediterráneo y atlántico, en la península y archipiélagos.Kongsberg 20

Search for gravitational-lensing signatures in the full third observing run of the LIGO-Virgo network

Gravitational lensing by massive objects along the line of sight to the source causes distortions of gravitational wave-signals; such distortions may reveal information about fundamental physics, cosmology and astrophysics. In this work, we have extended the search for lensing signatures to all binary black hole events from the third observing run of the LIGO--Virgo network. We search for repeated signals from strong lensing by 1) performing targeted searches for subthreshold signals, 2) calculating the degree of overlap amongst the intrinsic parameters and sky location of pairs of signals, 3) comparing the similarities of the spectrograms amongst pairs of signals, and 4) performing dual-signal Bayesian analysis that takes into account selection effects and astrophysical knowledge. We also search for distortions to the gravitational waveform caused by 1) frequency-independent phase shifts in strongly lensed images, and 2) frequency-dependent modulation of the amplitude and phase due to point masses. None of these searches yields significant evidence for lensing. Finally, we use the non-detection of gravitational-wave lensing to constrain the lensing rate based on the latest merger-rate estimates and the fraction of dark matter composed of compact objects

Search for eccentric black hole coalescences during the third observing run of LIGO and Virgo

Despite the growing number of confident binary black hole coalescences observed through gravitational waves so far, the astrophysical origin of these binaries remains uncertain. Orbital eccentricity is one of the clearest tracers of binary formation channels. Identifying binary eccentricity, however, remains challenging due to the limited availability of gravitational waveforms that include effects of eccentricity. Here, we present observational results for a waveform-independent search sensitive to eccentric black hole coalescences, covering the third observing run (O3) of the LIGO and Virgo detectors. We identified no new high-significance candidates beyond those that were already identified with searches focusing on quasi-circular binaries. We determine the sensitivity of our search to high-mass (total mass M>70 M⊙) binaries covering eccentricities up to 0.3 at 15 Hz orbital frequency, and use this to compare model predictions to search results. Assuming all detections are indeed quasi-circular, for our fiducial population model, we place an upper limit for the merger rate density of high-mass binaries with eccentricities 0<e≤0.3 at 0.33 Gpc−3 yr−1 at 90\% confidence level

Ultralight vector dark matter search using data from the KAGRA O3GK run

Among the various candidates for dark matter (DM), ultralight vector DM can be probed by laser interferometric gravitational wave detectors through the measurement of oscillating length changes in the arm cavities. In this context, KAGRA has a unique feature due to differing compositions of its mirrors, enhancing the signal of vector DM in the length change in the auxiliary channels. Here we present the result of a search for U(1)B−L gauge boson DM using the KAGRA data from auxiliary length channels during the first joint observation run together with GEO600. By applying our search pipeline, which takes into account the stochastic nature of ultralight DM, upper bounds on the coupling strength between the U(1)B−L gauge boson and ordinary matter are obtained for a range of DM masses. While our constraints are less stringent than those derived from previous experiments, this study demonstrates the applicability of our method to the lower-mass vector DM search, which is made difficult in this measurement by the short observation time compared to the auto-correlation time scale of DM

Aplicatiu web per a la confecció de plans de seguretat i salut en obres de construcció

Web application for redact health and safety plans in works. The application includes a manager of users, a manager for payment and the process for doing plans. It defines two kind of users: freemium and payment users. The firsts can do two plans in a year and the seconds doesn't have this limitation and besides they have editing tools.Aplicatiu web per redacció de plans de seguretat i salut a les obres de construcció. L'aplicatiu consta d'una gestió d'usuaris, una gestió de cobrament i el procés de redacció pròpiament dit. Defineix usuaris freemium i usuaris de pagament, els primers podran redactar dos plans a l'any gratuïts i els segons no tindran aquesta limitació i, a més a més, tindran eines d'edició.Aplicación web para redacción de planes de seguridad y salud en las obras de construcción. El aplicativo consta de una gestión de usuarios, una gestión de cobro y el proceso de redacción propiamente dicho. Define usuarios freemium y usuarios de pago, los primeros podrán redactar dos planos al año gratuitos y los segundos no tendrán esta limitación y, además, gozarán de herramientas de edición