Is the New Resonance Spin 0 or 2? Taking a Step Forward in the Higgs Boson Discovery

The observation of a new boson of mass \sim 125\gev at the CERN LHC may finally have revealed the existence of a Higgs boson. Now we have the opportunity to scrutinize its properties, determining its quantum numbers and couplings to the standard model particles, in order to confirm or not its discovery. We show that by the end of the 8 TeV run, combining the entire data sets of ATLAS and CMS, it will be possible to discriminate between the following discovery alternatives: a scalar $J^P=0^+$ or a tensor $J^P=2^+$ particle with minimal couplings to photons, at a $5\sigma$ statistical confidence level at least, using only diphotons events. Our results are based on the calculation of a center-edge asymmetry measure of the reconstructed {\it sPlot} scattering polar angle of the diphotons. The results based on asymmetries are shown to be rather robust against systematic uncertainties with comparable discrimination power to a log likelihood ratio statistic.Comment: 11 pages, 6 figures, 1 table. References added, minor typos correcte

R-parity as a residual gauge symmetry : probing a theory of cosmological dark matter

We present a non-supersymmetric scenario in which the R-parity symmetry $R_P = (-1)^{3(B-L)+2s}$ arises as a result of spontaneous gauge symmetry breaking, leading to a viable Dirac fermion WIMP dark matter candidate. Direct detection in nuclear recoil experiments probes dark matter masses around $2-5$ TeV for $M_{Z^{\prime}} \sim 3-4$ TeV consistent with searches at the LHC, while lepton flavor violation rates and flavor changing neutral currents in neutral meson systems lie within reach of upcoming experiments.Comment: 7 pages, 3 figure

Análise ergonómica de sistemas de produção orientados ao produto : estudo de um caso industrial

Neste artigo apresenta-se o trabalho realizado durante seis meses numa empresa de esquentadores Bosch Buderus Termotecnologia Portugal. O objectivo deste trabalho foi o estudo das condições ergonómicas da totalidade dos postos de trabalho do sistema de produção. Por haver necessidade de manipular cargas de peso elevado nos supermercados de materiais, estes foram alvo de análise tendo-se procurado estabelecer uma norma de utilização que obedecesse aos princípios básicos da ergonomia. Relata-se a análise ergonómica efectuada, que inclui a utilização de uma checklist que contemplou todos os postos de trabalho. Através da elaboração de um questionário foi possível avaliar as linhas de montagem final, avaliando a ergonomia em diferentes configurações, nomeadamente numa linha de montagem de layout linear e numa célula de layout U

Reconfiguração de sistemas de produção orientados ao produto : estudo de um caso industrial

Neste artigo apresenta-se o trabalho realizado numa empresa de esquentadores Bosch Buderus Termotecnologia Portugal. O objectivo deste trabalho foi a reconfiguração da linha existente de montagem final de esquentadores para duas células de montagem. A dificuldade em adaptar de maneira eficiente e eficaz a produção da linha às variações de modelos a produzir impunha a sua reorganização. Desta forma, a empresa decidiu experimentar novas configurações de sistemas de produção e, neste caso, de células de montagem. Da implementação do estudo realizado resultaram melhorias importantes no desempenho do sistema de produção, em particular, simplificações dos fluxos de materiais com economias substanciais de tempo e distâncias percorridas e ainda redução importante do número de operadores necessários para satisfazer a procura

Ball detection for boccia game analysis

The present article proposes the training, testing and comparison of two models for ball detection, taking into account its final implementation in a Boccia game analysis computer-vision algorithm, within the 'iBoccia' framework. The goal is to have a versatile and flexible algorithm towards different game environments. The selected ball detectors were a Histogram-of-Oriented-Gradients feature based Support Vector Machine (HOG-SVM) and a Convolutional Neural Network (CNN) based on a less complex implementation of the You Only Look Once model (Tiny-YOLO). Both detectors were evaluated offline and in real-time. The subsequent results showed that their performance was similar in both evaluations, however, Tiny-YOLO outperformed HOG-SVM by a small margin in all the used metrics. In real-time, both detectors achieved an accuracy of approximately 90%. Despite the high accuracy values, the detector requires further improvement because a single non-detection can influence the computer-vision algorithm's output, making the system unreliable.FCT - Fundação para a Ciência e a Tecnologia(SFRH/BD/ SFRH/BD/133314/2017)This article is supported by the project Deus ex Machina: NORTE – 01 – 0145 – FEDER - 000026, supported by Norte Portugal Regional Operational Programme (NORTE 2020), under the PORTUGAL 2020 Partnership Agreement, through the European Regional Development Fund (ERDF). Vinicius Silva also thanks FCT for the PhD scholarship SFRH/BD/ SFRH/BD/133314/2017

Deciphering the spin of new resonances in Higgsless models

We study the potential of the CERN Large Hadron Collider (LHC) to probe the spin of new massive vector boson resonances predicted by Higgsless models. We consider its production via weak boson fusion which relies only on the coupling between the new resonances and the weak gauge bosons. We show that the LHC will be able to unravel the spin of the particles associated with the partial restoration of unitarity in vector boson scattering for integrated luminosities of 150-560 fb^-1, depending on the new state mass and on the method used in the analyses.Comment: 7 pages, 4 figures. Version published in Physical Review

Resonant Lepton-Gluon Collisions at the Large Hadron Collider

We study the lepton-induced resonant production of color-adjoint leptons (leptogluons) at the LHC employing the lepton parton density function of the proton. We demonstrate that this production mechanism can be useful to extend the LHC ability to search for leptogluons beyond purely quark/gluon initiated production processes up to ~ 3.5 TeV leptogluon masses and O(1) TeV compositeness scales. Discerning leptogluons from scalar and vector leptoquarks is also possible in this channel, given a data sample containing the order of 100 signal events. We argue that the resonant channel can be combined with leptogluon pair and associated leptogluon-lepton productions to boost exclusion limits and discovery prospects at the LHC.Comment: 15 pages, 8 figure