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Even bigger data : preparing for the LHC/ATLAS upgrade

The Large Hadron Collider’s (LHC) experiments’ data volume is expected to grow one order of magnitude following the machine operation conditions upgrade in 2013-2014. The challenge to the scientific results of our team is: i) how to deal with a 10-fold increase in the data volume that must be processed for each analysis, while ii) supporting the increase in the complexity of the analysis applications, iii) redu...

Micropatterned coating for guided tissue regeneration in dental implantology

Nd isotope composition of the terrigenous component of sediments as a tracer fo...

The OMEX core KC 024-19 was studied aiming at to assess the influence of climate changes on the origin and transport of the sediments of the Galician continental slope, in the last 40 ka. The results show that sea level variation played a major role in the supply of the terrigenous sediments coming from the nearby continental areas, whose basement has a Variscan age. Additionally, coarse-grained clastic materia...

Procedimento para a obtenção de razões isotópicas de Sr e Nd representativas da...

Neste trabalho, apresenta-se um protocolo analítico para a obtenção das razões isotópicas 87Sr/86Sr e 143Nd/144Nd na fracção detrítica de sedimentos marinhos. Dado ser comum estes materiais apresentarem uma fracção biogénica carbonatada significativa, foram testadas diversas metodologias com o objectivo de extrair selectivamente os carbonatos sem comprometer a composição da componente terrígena. O ataque com ác...

FLYERS: FLYING OBJECTS OF THE ELECTRONIC SCENE FROM THE PERSPECTIVE OF GRAPHIC ...

O interesse no estudo dos flyers produzidos para a divulgação de festas de música eletrônica diz respeito à sua capacidade de traduzi-las em imagens. Esta potência estética tem sido reconhecida como um vetor criativo surgido no interior das culturas urbanas. Através da observação deste material, sua confecção e sua linguagem gráfica é possível ter contato com atitudes relativas a estes grupos e elementos simból...

Survey to identify Mycobacterium leprae-infected household contacts of patients...

Leprosy in Colombia is in the post-elimination phase; nevertheless, there are regions of this country where the incidence is still around 3-4/100,000. Early detection of leprosy patients is a priority for achieving control and elimination of leprosy; however, the clinical exam is not very sensitive and thus, the majority of patients are diagnosed only when they demonstrate lesions, and damage to the nerves and ...

ATLAS sensitivity to Wtb anomalous couplings in top quark decays

Abstract We study the sensitivity of the ATLAS experiment to Wtb anomalous couplings in top pair production with semileptonic decay, pp?tt̄?W+bW-b̄ with one of the W bosons decaying leptonically and the other hadronically. Several observables are examined, including the W helicity fractions and new quantities recently introduced, such as the ratios of helicity fractions and some angular asymmetries d...

Estudos sedimentares em dois estuários da costa oeste algarvia: relação cor-ferro

Os sedimentos estuarinos constituem valiosos registos das condições climáticas e ambientais regionais.

Study of ATLAS sensitivity to FCNC top decays

Abstract The ATLAS experiment sensitivity to top quark flavour changing neutral current (FCNC) decays was studied at LHC using tt̄ events. While one of the top quarks is expected to follow the dominant Standard Model decay t?bW, the other decays through a FCNC channel, i.e. t?Zu(c), t??u(c) or t?gu(c). Different types of analyses, applied to each FCNC decay mode, were compared. The FCNC branching ratio sensiti...

Probing anomalous Wtb couplings in top pair decays

Abstract We investigate several quantities, defined in the decays of top quark pairs, which can be used to explore non-standard Wtb interactions. Two new angular asymmetries are introduced in the leptonic decay of top (anti)quarks. Both are very sensitive to anomalous Wtb couplings, and their measurement allows for a precise determination of the W helicity fractions. We also examine other angular and energy as...