59,329 research outputs found
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
No full textFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
Di(vulgar) a ciência: José Reis e alguns apontamentos sobre o método
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão, Programa de Pós-Graduação em Literatura, Florianópolis, 2014.A proposta da pesquisa é elaborar criticamente o conceito de divulgação científica tendo por objeto de estudo os textos publicados pelo médico, jornalista e divulgador José Reis (1907-2002) na revista Anhembi entre 1955 e 1962. A escolha por Reis leva em conta o seu pioneirismo na divulgação no âmbito brasileiro e por ter transformado a ciência de forma geral em bandeira nacional. Pelo fato de a divulgação trazer implicitamente a separação entre o alto e o baixo, mestre e ignorante, além de empunhar em seu discurso uma ideia de ciência racional e objetiva, este trabalho acredita que o problema da divulgação envolve aspectos epistemológicos e metodológicos relevantes, inclusive para serem pensados no espaço das chamadas ciências humanas. A partir desta linha, a pesquisa põe em questão as relações entre ciência e filosofia, ciência e literatura, a fim de pensar, no limite, a própria ciência como ficção.Abstract : The objective of this paper is critically elaborate the concept of scientific divulgation having as object of study texts published by the physician and journalist José Reis (1907-2002) in Anhembi journal between 1955 and 1962. The choice of Reis takes into account its pioneering in the brazilian context and the fact that he has transformed science in general in a national flag. The divulgation brings implicitly the separation between high and low, master and ignorant, and carries in his speech an idea of rational and objective science. Because of that, this paper believes that the problem of scientific divulgation involves relevant epistemological and methodological aspects, even to be thought in the space of human sciences. In this way, the research calls into question the relationship between science and philosophy, science and literature, in order to think, ultimately, science itself as fiction
Porque a Argentina ganha outro Nobel
No full textoriginalFil: Reis, J..1 página de periódicoLFL-ACE. Artículos en la prensa sobre LFL, su obra y/o actividadesUnidad documental simpleAR-HYL-201
[Newspaper Clipping: Author Claims Evidence of Second JFK Assassin #1]
No full textNewspaper article titled "Author Claims Evidence of Second JFK Assassin." The article states that author Richard J. Whalen concluded "that there is circumstantial evidence to support the theory of a second assassin in the shooting of President John F. Kennedy.
Measurement of the ratio of prompt χ c to J / ψ production in pp collisions at √s = 7 TeV
No full textThe prompt production of charmonium χ c and J / ψ states is studied in proton-proton collisions at a centre-of-mass energy of √s = 7 TeV at the Large Hadron Collider. The χ c and J / ψ mesons are identified through their decays χ c → J / ψ γ and J / ψ → μ + μ - using 36 pb - 1 of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for χ c and J / ψ, σ (χ c → J / ψ γ) / σ (J / ψ), is determined as a function of the J / ψ transverse momentum in the range 2 < p T J / ψ < 15 GeV / c. The results are in excellent agreement with next-to-leading order non-relativistic expectations and show a significant discrepancy compared with the colour singlet model prediction at leading order, especially in the low p T J / ψ region
Description of males of Phallotorynus pankalos Lucinda, Rosa & Reis, 2005 and reappraisal of Phallotorynus species relationships (Teleostei: Cyprinodontiformes: Poeciliidae)
No full textFig. 5. Areagram showing drainage relationships based on phylogenetic analysis of Phallotorynus (modified from Lucinda et al., 2005). Arrows indicate major vicariant and dispersion events.Published as part of Lucinda, Paulo H. F. & da Graça, Weferson J., 2015, Description of males of Phallotorynus pankalos Lucinda, Rosa & Reis, 2005 and reappraisal of Phallotorynus species relationships (Teleostei: Cyprinodontiformes: Poeciliidae), pp. 87-92 in Neotropical Ichthyology 13 (1) on page 91, DOI: 10.1590/1982-0224-20140071, http://zenodo.org/record/463921
Runaway electron imaging spectrometry (REIS) system
No full textA portable Runaway Electron Imaging and Spectrometry System (REIS) was developed in ENEA-Frascati to measure synchrotron radiation spectra from in-flight runaway electrons in tokamaks. The REIS is a wide-angle optical system collecting simultaneously visible and infrared emission spectra using an incoherent bundle of fibers, in a spectral range that spans from 500 nm to 2500 nm, and visible images using a CCD color microcamera at a rate of 25 frames/s. The REIS system is supervised and managed using a dedicated LabVIEW program to acquire data simultaneously from three spectrometers every 20 ms (configurable down to 10 ms). An overview of the REIS architecture and acquisition system and resulting experimental data obtained in FTU are presented and discussed in this paper
Measurement of the CP-violating phase \phi s in Bs->J/\psi\pi+\pi- decays
No full textMeasurement of the mixing-induced CP-violating phase phi_s in Bs decays is of prime importance in probing new physics. Here 7421 +/- 105 signal events from the dominantly CP-odd final state J/\psi pi+ pi- are selected in 1/fb of pp collision data collected at sqrt{s} = 7 TeV with the LHCb detector. A time-dependent fit to the data yields a value of phi_s=-0.019^{+0.173+0.004}_{-0.174-0.003} rad, consistent with the Standard Model expectation. No evidence of direct CP violation is found
Fig. 1. Phallotorynus pankalos, NUP 5839 in Description of males of Phallotorynus pankalos Lucinda, Rosa & Reis, 2005 and reappraisal of Phallotorynus species relationships (Teleostei: Cyprinodontiformes: Poeciliidae)
No full textFig. 1. Phallotorynus pankalos, NUP 5839, male, 19.2 mm SL. Photo by Celso Ikedo (Nupélia-UEM).Published as part of Lucinda, Paulo H. F. & da Graça, Weferson J., 2015, Description of males of Phallotorynus pankalos Lucinda, Rosa & Reis, 2005 and reappraisal of Phallotorynus species relationships (Teleostei: Cyprinodontiformes: Poeciliidae), pp. 87-92 in Neotropical Ichthyology 13 (1) on page 88, DOI: 10.1590/1982-0224-20140071, http://zenodo.org/record/463921
Measurement of the time-dependent CP asymmetry in B0 -> J/ψ KS0 decays
No full textThis Letter reports a measurement of the CP violation observables SJ/ψK0S and CJ/ψK0S in the decay channel B0→J/ψK0S performed with 1.0 fb−1 of pp collisions at s√=7 TeV collected by the LHCb experiment. The fit to the data yields SJ/ψK0S=0.73±0.07(stat)±0.04(syst) and CJ/ψK0S=0.03±0.09(stat)±0.01(syst). Both values are consistent with the current world averages and within
expectations from the Standard Model
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