1,298 research outputs found

    XLIII Conferências de Genética Doutor Jacinto Magalhães: resumo das comunicações

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    Suplemento da revista Nascer & Crescer com os resumos dos Posters e Comunicações orais apresentadas durante as XLIII Conferências de Genética Doutor Jacinto Magalhães que decorreu no dia 28 de março de 2014, na cidade do Porto, Portuga

    Hipertensão pulmonar na criança o que há de novo?: Resumo das comunicações

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    Suplemento da revista Nascer & Crescer com os resumos das Comunicações Livres apresentadas durante a Reunião Científica "Hipertensão pulmonar na criança: o que há de novo?" que decorreu no dia 13 de junho de 2014, na cidade do Porto, Portuga

    XXVI Reunião de Pediatria do CMIN-CHP: Resumo das comunicações

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    Suplemento da revista Nascer & Crescer com os resumos dos Posters e Comunicações orais apresentadas durante a XXVI Reunião Anual de Pediatria CMIN – CHP que decorreu entre os dias 28 e 29 de novembro de 2014, na cidade do Porto, Portuga

    An improved model of vector mesons in holographic QCD

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    We analyze the sector of dimension-three vector meson operators in the "hard wall" model of holographic QCD, including the vector and axial currents, dual to gauge fields in the bulk, and the tensor operator ψˉσμνψ\bar{\psi}\sigma^{\mu\nu}\psi, dual to a two-form field satisfying a complex self-duality condition. The model includes the effect of chiral symmetry breaking on vector mesons, that involves a coupling between the dual gauge field and the two-form field. We compute the leading logarithmic terms in the operator product expansion of two-point functions and the leading non-perturbative contribution to the tensor-vector correlator. The result is consistent with the operator product expansion of QCD. We also study the spectrum of vector mesons numerically.Comment: 19 page

    Reducing the parameter space for Unparticle-inspired models using white dwarf masses

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    Based on astrophysical constraints derived from Chandrasekhar's mass limit for white-dwarfs, we study the effects of the model on the parameters of unparticle-inspired gravity, on scales ΛU>1  TeV\Lambda_U > 1 \; TeV and dU≈1d_U \approx 1.Comment: 4 pp., 4 Fig., to appear in PR

    On the connection of Gamma-rays, Dark Matter and Higgs searches at LHC

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    Motivated by the upcoming Higgs analyzes we investigate the importance of the complementarity of the Higgs boson chase on the low mass WIMP search in direct detection experiments and the gamma-ray emission from the Galactic Center measured by the Fermi-LAT telescope in the context of the SU(3)c⊗SU(3)L⊗U(1)NSU(3)_c\otimes SU(3)_L\otimes U(1)_N. We obtain the relic abundance, thermal cross section, the WIMP-nucleon cross section in the low mass regime and network them with the branching ratios of the Higgs boson in the model. We conclude that the Higgs boson search has a profound connection to the dark matter problem in our model, in particular for the case that (MWIMP<60M_{WIMP} < 60 GeV) the BR(H→2H \rightarrow 2 WIMPs) ≳90\gtrsim 90%. This scenario could explain this plateau of any mild excess regarding the Higgs search as well as explain the gamma-ray emission from the galactic center through the bbˉb\bar{b} channel with a WIMP in the mass range of 25-45 GeV, while still being consistent with the current limits from XENON100 and CDMSII. However, if the recent modest excesses measured at LHC and TEVATRON are confirmed and consistent with a standard model Higgs boson this would imply that MWIMP>60 M_{WIMP} > 60 GeV, consequently ruling out any attempt to explain the Fermi-LAT observations.Comment: 8 pages, 9 figure

    Micotoxinas em amêndoas da castanheira-do-brasil.

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    Durante a palestra serão discutidos os problemas inerentes à presença de aflatoxinas na cadeia produtiva de castanha-do-brasil, os resultados obtidos durante o desenvolvimento do projeto e seu potencial impacto para a melhoria da qualidade deste produto

    Micotoxinas em amêndoas da castanheira-do-brasil.

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    Durante a palestra serão discutidos os problemas inerentes à presença de aflatoxinas na cadeia produtiva de castanha-do-brasil, os resultados obtidos durante o desenvolvimento do projeto e seu potencial impacto para a melhoria da qualidade deste produto

    Conclusion

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