Fast Reconstruction and Data Scouting

Data scouting, introduced by CMS in 2011, is the use of specialized data streams based on reduced event content, enabling LHC experiments to record unprecedented numbers of proton-proton collision events that would otherwise be rejected by the usual filters. These streams were created to maintain sensitivity to new light resonances decaying to jets or muons, while requiring minimal online and offline resources, and taking advantage of the fast and accurate online reconstruction algorithms of the high-level trigger. The viability of this technique was demonstrated by CMS in 2012, when 18.8 fb$^{-1}$ of collision data at $\sqrt{s} = 8$ TeV were collected and analyzed. For LHC Run 2, CMS, ATLAS, and LHCb implemented or expanded similar reduced-content data streams, promoting the concept to an essential and flexible discovery tool for the LHC.Comment: 8 pages, 5 figures; submitted to proceedings of Connecting the Dots 201

Search for natural Supersymmetry in events with 1 b-tagged jet using razor variables at 8 TeV

We discuss a search for natural Supersymmetry in events with at least one bottom-quark jet using razor variables in proton-proton collisions at 8 TeV with the CMS detector. The event distribution in the plane defined by the razor variables $R^2$ and $M_R$ is studied, searching for a peaking signal on top of a smoothly falling standard model background. The data are consistent with the expected background, modeled by a template function. The 95% C.L. exclusion limit on the masses of the gluino and lightest supersymmetric particle in a benchmark simplified model is presented. For a lightest supersymmetric particle mass of 100 GeV, the pair production of gluinos in a multi-bottom final state is excluded for gluino masses up to 1375 GeV.Comment: LHCP Conference 201

Majorana neutrino decay in an Effective Approach

The search strategy or the finding of new effects for heavy neutrinos often relies on their different decay channels to detectable particles. In particular in this work we study the decay of a Majorana neutrino with interactions obtained from an effective general theory modeling new physics at the scale $\Lambda$. The results obtained are general because they are based in an effective theory and not in specific models. We are interested in relatively light heavy Majorana neutrinos, with masses lower than the $W$ mass ($m_N<m_W$). This mass range simplifies the study by reducing the possible decay modes. Moreover, we found that for $\Lambda\sim 1$ T$e$V, the neutrino plus photon channel could give explanation to different observations: we analyze the potentiality of the studied interactions to explain some neutrino-related problems like the MiniBooNE and SHALON anomalies. We show in different figures the dominant branching ratios and the decay length of the Majorana neutrino in this approach. This kind of heavy neutral leptons could be searched for in the LHC with the use of displaced vertices techniques. \Comment: 15 page, 5 figure

Search for natural Supersymmetry in events with 1 b-tagged jet using razor variables at √s = 8 TeV

We discuss a search for natural Supersymmetry in events with at least one bottom-quark jet using razor variables in proton-proton collisions at √s = 8 TeV with the CMS detector. The event distribution in the plane defined by the razor variables R^2 and M_R is studied, searching for a peaking signal on top of a smoothly falling standard model background. The data are consistent with the expected background, modeled by a template function. The 95% C.L. exclusion limit on the masses of the gluino and lightest supersymmetric particle in a benchmark simplified model are presented. For a lightest supersymmetric particle mass of 100 GeV, the pair production of gluinos in a multi-bottom final state is excluded for gluino masses up to 1375 GeV

Effective Majorana neutrino decay

We study the decay of heavy sterile Majorana neutrinos according to the interactions obtained from an effective general theory. We describe the two and three-body decays for a wide range of neutrino masses. The results obtained and presented in this work could be useful for the study of the production and detection of this particles in a variety of high energy physics experiments and astrophysical observations. We show in different figures the dominant branching ratios and the total decay width.Comment: 22 pages, 9 figures. arXiv admin note: text overlap with arXiv:1508.0158

Inclusive Searches for Supersymmetry with the CMS detector at √s = 8 TeV

We discuss two complementary searches for supersymmetry and their combination carried out on approximately 19 fb^(-1) of data collected by CMS during the √s = 8 TeV LHC run. Results for a variety of final state signatures, including multi-bottom, multi-top, and mixed top-plus-bottom quark topologies, are presented. The combination of results yields an improved bound on the top-squark mass. For a neutralino mass of 100 GeV, the branching fraction dependent (independent) pair production of gluinos and top squarks is excluded for gluino masses up to 1310 (1175) GeV and for top squark masses up to 730 (645) GeV

Conocimientos del personal de enfermería sobre infecciones de vías aéreas respiratorias en pacientes internados bajo asistencia de ventilación mecánica

La neumonía es la segunda complicación infecciosa en el medio hospitalario en los servicios cerrados como en terapia intensiva, la neumonía nosocomial se produce en mayor cantidad en pacientes con asistencia mecánica ventilatoria, es la frecuente de mortalidad entre las infecciones, principalmente si son debidas a pseudomonas aureginosas y staphylococcus aureus resistente a meticilina. Además esta infección aumenta los días de ventilación mecánica y la estancia en la terapia intensiva y por ende hospitalaria. La presencia de una opacidad en la radiología de tórax y secreciones traqueales purulentas son condiciones imprescindibles para su diagnostico. Si el diagnostico de neumonía. Objetivo general: Indagar si las normas de bioseguridad en conjunto con las técnicas de enfermería en el tratamiento, son las adecuadas para evitar infecciones en pacientes en asistencia mecánica respiratoria. Material y método: se realiza un estudio tipo cuantitativo, descriptivo de corte transversal. Universo y muestra de 40 Enfermeros, se aplico una encuesta estructurada. Resultados: Se descubrió que dentro del mismo servicio, el 50% de los encuestados, no saben realizar los pasos del lavado de mano, generando incertidumbre y dudas de su accionar frente del paciente en las diferentes técnicas que se realizan en la unidad, siendo esta una técnica universal y un pilar fundamental para disminuir alto nivel de contaminación y enfermedades cruzadas.Fil: Duarte, Fernanda. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Escuela de Enfermería..Fil: Ponce, Javier. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Escuela de Enfermería.

Naturalness Confronts Nature: Searches for Supersymmetry with the CMS Detector in pp Collisions at √s = 8 and 13 TeV

In this thesis, we present two inclusive searches for supersymmetric particles at 8 and 13 TeV using the razor variables and guided by the principle of naturalness. We build a framework to explore the natural supersymmetry parameter space of gluino and top squark masses and branching ratios, which is a unique attempt to cover this parameter space in a more complete way than ever before using LHC data. With this approach, the production of top squarks and gluinos are excluded below 700 GeV and 1.6 TeV, respectively, independent of the branching ratios, constituting one of the tightest constraints on natural supersymmetry from the LHC. Motivated by the need to mitigate the effects of multiple interactions per bunch crossing (pileup), an essential feature of present and future hadron colliders, in this thesis we also study the precision timing capabilities of a LYSO-based sampling calorimeter, and achieve a time resolution of 30 ps in electron test beam measurements. The achieved resolution corresponds to the precision needed to significantly reduce the inclusion of pileup particles in the reconstruction of the event of interest. This study is foundational in building an R and D program on precision timing for the high-luminosity LHC and other future hadron colliders. We also propose alternative simplified models to study Higgs-plus-jets events at the LHC, and reinterpret an excess observed at 8 TeV in the context of these models. Finally, we discuss a search for narrow resonances in the dijet mass spectrum at 13 TeV using the data-scouting technique at CMS, which records a smaller event format to increase the maximum recordable rate. For the benchmark models with a vector or axial-vector mediator that couples to quarks and dark matter particles, the dijet search excludes mediator masses from 0.5 TeV up to 2.7 TeV largely independent of the dark matter particle mass, which constitutes a larger exclusion than traditional mono-X searches at the LHC. In the plane of the dark matter-nucleon interaction cross section versus dark matter mass, the dijet search is also more sensitive than direct detection experiments for spin-dependent cross sections

Mediating towards digital inclusion: the monitors of internet access places

Local dynamics play a key role in individual and collective empowerment for digital literacy and citizenship. This paper presents the results and reflections from a broader investigation into the public Internet access places in Portugal in the inland municipalities of the country's coast, undertaken by ObLID Network. Specifically, we intend to reflect on the actual mission of these places and reveal the actual profile, activities and training needs of their monitors and coordinators. In the first stage of the empirical study, several documents available on the Internet Spaces Network are analyzed. In the second stage, a questionnaire was applied to monitors and coordinators of the Internet access places, in seventeen Portuguese municipalities. The research results warn of the need to redefine and clarify the social and educational value of Internet spaces, indicating that the dominant activities of monitors in the Internet access places do not induce the foster of literacy and digital inclusion of the most vulnerable groups. In this context, actions are proposed that can contribute to improving the mission of Internet places, as well as the training quality of their monitors and coordinators. Internet Access Spaces, made available by municipalities, should be used to promote digital literacy programs, for individuals and groups.info:eu-repo/semantics/publishedVersio