QCD resummation in the framework of supersymmetry

Motivated by current searches for electroweak superpartners at the Large Hadron Collider, we present precision predictions for pair production of such particles in the framework of the Minimal Supersymmetric Standard Model. We make use of various QCD resummation formalisms and match the results to pure perturbative QCD computations. We study the impact of scale variations and compare our results to predictions obtained by means of traditionally used Monte Carlo event generators.Comment: 4 pages, 2 figures, contribution to the proceedings of Moriond QCD 201

Revisiting slepton pair production at the Large Hadron Collider

Motivated by the shift in experimental attention towards electroweak supersymmetric particle production at the CERN LHC, we update in this paper our precision predictions at next-to-leading order of perturbative QCD matched to resummation at the next-to-leading logarithmic accuracy for direct slepton pair production in proton-proton collisions. Simplified models, now commonly adopted by the experimental collaborations for selectrons and smuons as well as mixing staus, are used as benchmarks for total cross sections at achieved and future center-of-mass energies. They are presented together with the corresponding scale and parton density uncertainties in graphical and tabular form for future reference. Using modern Monte Carlo techniques, we also reanalyze recent ATLAS and CMS slepton searches in light of our precision cross sections and for various assumptions on the decomposition of the sleptons and their neutralino decay products.Comment: 32 pages, 10 figures, 4 tables; version accepted by JHE

Atomistic simulation of SrTiO3(001) surface relaxation

The (001) surface relaxation of the cubic perovskite SrTiO3 crystal has been studied using the shell model. The positions of atoms in several surface layers embedded in the electrostatic field of the remainder of the crystal are calculated. We show that Ti4+, Sr2+ and O2- ions in six near-surface layers are displaced differently from their crystalline sites which leads to the creation of so-called surface rumpling, a dipole moment, and an electric field in the near-surface region. Calculated atomic displacements are compared with LEED experimental data

Clinical and radiological features of Mycobacterium kansasii and other NTM infections

SummaryBackgroundMycobacterium kansasii infection is one of the most common causes of nontuberculous mycobacterial lung disease in the world. However, it is not possible to differentiate completely between M. kansasii and other nontuberculous mycobacteria (NTM) because of a lack of direct comparative studies. This retrospective study sought to identify their clinical and radiological features systematically.MethodsThe sample included 98 consecutive patients with a culture-positive diagnosis of NTM infection, derived from the databases of the Laboratory of Microbiology of a tertiary medical center and two outpatient tuberculosis centers. Sixty-four patients had M. kansasii infection. All patients fulfilled disease criteria for treatment. Data on patient background and clinical features were collected, and chest radiographs were evaluated.ResultsIn the M. kansasii group, n = 27 (42%) were native-born Israelis compared to 9.4% (n = 3) of all other NTM groups (p = 0.0001). Similar rates of co-morbid diseases, including diabetes mellitus, heart disease, lung diseases, and malignancy were noted in both groups. Old TB was less common in the M. kansasii group compared to the other NTM (3.1% vs. 23.5%, p = 0.003). Clinical symptoms were significantly more common in patients with M. kansasii infection. On radiological study, M. kansasii infection was associated with more cavitations and unilaterality. Patients with M. kansasii infection had a higher likelihood of right upper lobe disease (p = 0.001). Pleural effusions and lymphadenopathy were found only in a few patients in each group.ConclusionMajor differences in the epidemiologic and clinical features of M. kansasii infection and other NTM have important diagnostic and clinical implications

Dopant solubility in ceria: alloy thermodynamics combined with the DFT+U calculations

This research was partly funded by the Russian Science Foundation (under the project 14-43-0005) and ERA-NET HarvEnPiez project, with the computer resources provided by Stuttgart Supercomputing Centre (Project DEFTD 12939). A. C. also acknowledges financial support from the University of Latvia Foundation (Arnis Riekstins’s ‘‘MikroTik’’ donation). Authors thank R. Merkle, A. Popov for fruitful discussions.Tb-doped CeO2 (ceria) is a promising mixed conductor for oxygen permeation membranes and reversible oxygen sorbents. To predict solubility of Tb ions in ceria for a wide range of concentrations, density functional theory (DFT+U) calculations with two different values of Hubbard U-parameter on Tb and Ce ions were combined with alloy thermodynamics and the Concentration Wave approach. It is shown that, to predict properties of disordered solid solutions at finite temperatures, the energy parameters in the mixing energies can be extracted from the DFT+U calculations performed at T = 0 K for two ordered configurations of the dopant in the supercells. The unlimited solubility of Tb4+ in CeO2 in the quasi-binary cross-section CeO2-TbO2 is predicted in the temperature range where both stoichiometric TbO2 and CeO2 reveal fluorite structures (above 700 °C).Russian Science Foundation (under the project 14-43-0005); ERA-NET HarvEnPiez project; Stuttgart Supercomputing Centre Project DEFTD 12939; Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the European Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART

QCD RESUMMATION IN THE FRAMEWORK OF SUPERSYMMETRY

Motivated by current searches for electroweak superpartners at the Large Hadron Collider, we present precision predictions for pair production of such particles in the framework of the Minimal Supersymmetric Standard Model. We make use of various QCD resummation formalisms and match the results to pure perturbative QCD computations. We study the impact of scale variations and compare our results to predictions obtained by means of traditionally used Monte Carlo event generators

Retrieving intracycle interference in angle-resolved laser-assisted photoemission from argon

We report on a combined experimental and theoretical study of XUV ionization of atomic argon in the presence of a near-infrared (NIR) laser field. Using a table-top source of wavelength-selected femtosecond XUV pulses in combination with a velocity map imaging spectrometer we record angle- and energy-resolved photoelectron distributions and simulate the experimental data by solving the time-dependent Schrödinger equation ab initio. In order to compare with the experimental data we average the calculated energy-angle probability distributions over the experimental focal volume for different values of the magnetic quantum number of the photoelectron. This averaging procedure washes out the intracycle interference pattern, which would otherwise be observed in the form of angular modulations of the photoelectron spectra. We recover these modulations experimentally and in the simulations by evaluating the difference between two averaged distributions that are obtained for slightly different NIR laser field intensities.Fil: Hummert, Johan. Max Born Institute; AlemaniaFil: Kubin, Markus. Max Born Institute; AlemaniaFil: López, Sebastián David. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Fuks, Johanna Ildemar. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaFil: Morales, Felipe. Max Born Institute; AlemaniaFil: Vrakking, Marc J. J.. Max Born Institute; AlemaniaFil: Kornilov, Oleg. Max Born Institute; AlemaniaFil: Arbó, Diego G.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentin

Qualificando a adesão à democracia: quão democráticos são os democratas brasileiros?

Resumo O presente artigo busca qualificar a adesão à democracia no Brasil. Ele parte da ideia de que a adesão à democracia é mais bem entendida de um ponto de vista multidimensional. Os indivíduos podem aderir a diferentes princípios subjacentes Ã  democracia, em vez de optarem pela simples adesão ou não a ela. Nosso enfoque são os democratas: queremos saber quão democráticos são os democratas brasileiros. Utilizamos aqui o banco de dados Barômetro das Américas de 2006 a 2012. Os resultados mostram que existem diferentes níveis de adesão à democracia, conforme o princípio democrático em questão. Os brasileiros aderem com maior intensidade Ã  dimensão participativa, em detrimento da procedimental e da representativa. Mostramos, no entanto, que esses princípios podem caminhar de forma mais ou menos independente. Palavras chave: adesão à democracia, apoio político, legitimidade política, atitudes políticas, consolidação da democracia.   Abstract This article aims to qualify the support for democracy in Brazil. He starts from the idea that support for democracy is better understood from a multidimensional point of view. That is, individuals may adhere to different principles underlying democracy, rather than simple adherence to the political regime or not. Our focus is on the Democrats. Based on the multidimensional view, we want to know how democratic are the Brazilian Democratic. To meet this goal, we use the database of the Americas Barometer data from 2006 to 2012. The findings show that there are different levels of adherence to democracy, as the democratic principle in question. Brazilians adhere more strongly participatory dimension, rather than procedural and representative. We have shown, however, that these principles are not strongly connected to each other, ie they can move relatively independently. Keywords: support for democracy, political support, political legitimacy, political attitudes, consolidation of democrac

Spectrochemical analysis of metals in gingival fluid of patients with dental implants and different prosthetic materials

Fil: Grenón, Miriam Silvina. Universidad Nacional de Córdoba. Facultad de Odontología. Cátedra de Periodoncia A; Argentina.Fil: Grenón, Miriam Silvina. Universidad Católica de Córdoba. Facultad de Ciencias de la Salud. Cátedra de Periodontología; Argentina.Fil: Fuks, Mario David. Universidad Nacional de Córdoba. Facultad de Odontología. Cátedra de Periodoncia A; Argentina.Fil: García, Manuel Alejandro. Universidad Nacional de Córdoba. Facultad de Ciencias Médicas. Departamento de Fisicoquímica; Argentina.Fil: García, Manuel Alejandro. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones en Química Biológica; Argentina.Fil: Oliva, Fabiana. Universidad Nacional de Córdoba. Facultad de Ciencias Médicas. Departamento de Fisicoquímica; Argentina.Fil: Oliva, Fabiana. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones en Química Biológica; Argentina.Fil: Ibáñez, Juan Carlos. Universidad Católica de Córdoba. Facultad de Ciencias de la Salud. Cátedra de Periodontología; Argentina.Fil: Ibáñez, María Constanza. Universidad Católica de Córdoba. Facultad de Ciencias de la Salud. Cátedra de Periodontología; Argentina.Fil: Juaneda, María Agustina. Universidad Católica de Córdoba. Facultad de Ciencias de la Salud. Cátedra de Periodontología; Argentina.Fil: Pérez, Carlos A. Brazilian Synchrotron Light Source; Brasil.Fil: Sánchez, Héctor Jorge. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Sánchez, Héctor Jorge. Consejo Nacional de Investigaciones y Técnicas. Instituto de Física Enrique Gaviola; Argentina.Titanium dental implants are in an electrolytic hostile media composed by bacterial colonies, gingival fluid, and inflamed tissues. It triggers an electrochemical degradation process known as corrosion. During this process, different ions are released to the media and to the organism from the implant. This can result in the degradation of the implant surface, i.e., increase of the roughness and decrease of the TiO2 protective layer. In addition, it leads to cytotoxic responses and inflammatory processes that can cause pathological conditions such as peri-implantitis.http://pages.cnpem.br/rau/wp-content/uploads/sites/8/2015/03/Livro-de-Resumos-Final.pdfFil: Grenón, Miriam Silvina. Universidad Nacional de Córdoba. Facultad de Odontología. Cátedra de Periodoncia A; Argentina.Fil: Grenón, Miriam Silvina. Universidad Católica de Córdoba. Facultad de Ciencias de la Salud. Cátedra de Periodontología; Argentina.Fil: Fuks, Mario David. Universidad Nacional de Córdoba. Facultad de Odontología. Cátedra de Periodoncia A; Argentina.Fil: García, Manuel Alejandro. Universidad Nacional de Córdoba. Facultad de Ciencias Médicas. Departamento de Fisicoquímica; Argentina.Fil: García, Manuel Alejandro. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones en Química Biológica; Argentina.Fil: Oliva, Fabiana. Universidad Nacional de Córdoba. Facultad de Ciencias Médicas. Departamento de Fisicoquímica; Argentina.Fil: Oliva, Fabiana. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones en Química Biológica; Argentina.Fil: Ibáñez, Juan Carlos. Universidad Católica de Córdoba. Facultad de Ciencias de la Salud. Cátedra de Periodontología; Argentina.Fil: Ibáñez, María Constanza. Universidad Católica de Córdoba. Facultad de Ciencias de la Salud. Cátedra de Periodontología; Argentina.Fil: Juaneda, María Agustina. Universidad Católica de Córdoba. Facultad de Ciencias de la Salud. Cátedra de Periodontología; Argentina.Fil: Pérez, Carlos A. Brazilian Synchrotron Light Source; Brasil.Fil: Sánchez, Héctor Jorge. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Sánchez, Héctor Jorge. Consejo Nacional de Investigaciones y Técnicas. Instituto de Física Enrique Gaviola; Argentina.Odontología, Medicina y Cirugía Ora