Fake Missing Transverse Energy from Calorimeter Effects

In this paper we discuss briefly the correlation between fake missing transverse energy and jets pointing to crack regions in the ATLAS calorimeters.Comment: Prepared for the BSM-LHC Whitepaper (Nuclear Physics B

Determination of QCD Backgrounds in ATLAS: A challenge for SUSY searches

In this paper we briefly discuss the estimation of uncertainties in QCD backgrounds to searches for Supersymmetry under development by the ATLAS collaboration.Comment: Proceedings of SUY09. Boston (USA

Searching for doubly-charged vector bileptons in the Golden Channel at the LHC

In this paper we investigate the LHC potential for discovering doubly-charged vector bileptons considering the measurable process $p,p$ $\rightarrow$ $e^{\mp}e^{\mp}\mu^{\pm}\mu^{\pm} X$. We perform the study using four different bilepton masses and three different exotics quark masses. Minimal LHC integrated luminosities needed for discovering and for setting limits on bilepton masses are obtained for both 7 TeV and 14 TeV center-of-mass energies. We find that these spectacular signatures can be observed at the LHC in the next years up to a bilepton mass of order of 1 TeV.Comment: 8 pages, 10 figure

Cosmic Ray Muons Timing in the ATLAS Detector

In this talk I discuss the use of calorimeter timing both for detector commissioning and in searches for new physics. In particular I present real and simulated cosmic ray muons data results for the ATLAS Tile Calorimeter system. The analysis shows that several detector errors such as imperfect calibrations can be uncovered. I also demonstrate the use of ATLAS Tile Calorimeters excellent timing resolution in suppressing cosmic ray fake missing transverse energy in searches for supersymmetry.Comment: Proceedings of CIPANP 2009, peer-reviewed by the ATLAS Collaboratio

Virtual bilepton effects in polarized Moller scattering

We investigate the indirect effects of heavy vector bileptons being exchanged in polarized Moller scattering, at the next generation of linear colliders. Considering both longitudinal and transverse beam polarization, and accounting for initial-state radiation, beamstrahlung and beam energy spread, we discuss how angular distributions and asymmetries can be used to detect clear signals of virtual bileptons, and the possibility of distinguishing theoretical models that incorporate these exotic particles. We then estimate 95% C.L. bounds on the mass of these vector bileptons and on their couplings to electrons.Comment: 19 pages, 10 figure

Searches for baryon number violation in the HIBEAM-NNBAR experiment at the European Spallation Source

The HIBEAM-NNBAR program is a proposed two-stage experiment at the European Spallation Source (ESS) designed to search for baryon number violation, which is - together with C and CP violation - one of the three fundamental Sakharov conditions to explain the observed baryon asymmetry of the Universe. Taking advantage of the ESS' unique capabilities as the future brightest neutron source, the experiment will make high sensitivity searches for neutrons converting into antineutrons and/or sterile neutrons.Comment: Prepared for Proceedings of FPCP 202

Time of Flight Analysis Using Cosmic Ray Muons in the ATLAS Tile Calorimeter

Using cosmic ray muon data recorded during the summer of 2007, we have studied the time-of-flight distributions between back-to-back modules of the ATLAS Tile Calorimeter. The results are in good agreement with the distributions expected from calorimeter geometry, and allow for cross-checks of timing corrections obtained in laser runs. Calorimeter timing is a useful tool to remove non-physics backgrounds, and we introduce new cuts at the cell level which improve the signal-to-noise ratio

Sobre dos casos de sindrome vestíbulo-espinal de Barré

Nas notas deste artigo refletiremos sobre o conceito de práxis e sua relação com o contexto escolar. A escolha da temática se deu a partir da necessidade de aprofundar o sentido e o entendimento filosófico do termo, mas, acima de tudo, pela importância de se observar os seus desdobramentos na realidade educacional, a fim de que estes possam colaborar para uma ação futura nos diferentes espaços pedagógicos. Buscaremos também, relacionar a práxis como o processo e a dinâmica pedagógica que se traduz pela compreensão crítica da realidade, estabelecendo correlações de causa e efeito, formulação de juízos com vistas ao desenvolvimento integral do aluno, como caminho para o alcance de uma verdadeira cidadania. Apontaremos dentre outros os aspectos relevantes, não só o desenvolvimento da teoria na prática, mas também para a construção do conhecimento a cerca desta temática como um elemento importante para a atuação dos profissionais na área da educação.Palavras-chave: Práxis. Educação. Transformação