119,890 research outputs found

    Measurement of the ratio of prompt χ c to J / ψ production in pp collisions at √s = 7 TeV

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    The 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

    Dastaset for: "Rodriguez-Galiano, V.F., Sanchez-Castillo, M., Dash, J., Atkinson, P. and Ojeda-Zujar, J. (2016). Modelling interannual variation in the spring and autumn land surface phenology of the European forest, Biogeosciences, 13

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    &lt;p&gt;Dastaset for: &quot;Rodriguez-Galiano, V.F., Sanchez-Castillo, M., Dash, J., Atkinson, P. and Ojeda-Zujar, J. (2016). Modelling interannual variation in the spring and autumn land surface phenology of the European forest, Biogeosciences, 13&lt;/p&gt

    Proctolaelaps cubanus Karg & Rodriguez 1984

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    Proctolaelaps cubanus Karg & Rodriguez , 1984 Proctolaelaps cubanus Karg & Rodriguez, 1984: 357. Proctolaelaps cubanus.— Karg & Rodriguez, 1985: 168; Farrier & Hennessey, 1993: 43. Proctolaelaps (Proctolaelaps) cubanus.—Karg, 1985: 191; 1988 a: 448. TYPE DEPOSITORY: Institutes für Pflanzenschutzforschung, Kleinmachnow, Germany. TYPE LOCALITY AND HABITAT: Estacion Nacionalde de Sanidad de los Citricos, Havana, Cuba, in soil of a coffee [Coffea sp.; Plantae: Rubiaceae] plantation.Published as part of De Moraes, Gilberto J., Britto, Erika P. J., Mineiro, Jefferson L. De C. & Halliday, Bruce, 2016, Catalogue of the mite families Ascidae Voigts & Oudemans, Blattisociidae Garman and Melicharidae Hirschmann (Acari: Mesostigmata), pp. 1-299 in Zootaxa 4112 (1) on page 209, DOI: 10.11646/zootaxa.4112.1.1, http://zenodo.org/record/39947

    Measurement of J/ψ production in pp collisions at s√=2.76TeV

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    The production of J/ψ mesons is studied with the LHCb detector using data from pp collisions at s√=2.76 TeV corresponding to an integrated luminosity of 71 nb−1. The differential cross-section for inclusive J/ψ production is measured as a function of its transverse momentum p T. The cross-section in the fiducial region 0 &#60; p T  &#60; 12 GeV/c and rapidity 2.0 &#60; y &#60;4.5 is measured to be 5.6 ± 0.1 (stat) ± 0.4 (syst) μb, with the assumption of unpolarised J/ψ production. The fraction of J/ψ production from b-hadron decays is measured to be (7.1 ± 0.6 (stat) ± 0.7 (syst))%

    NN from Colombia collected by L. Ramos, E. Álvarez, J. Cabezas, J. Rodriguez & C. Ibañez #66

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    File Name: TOLI-24909-RAN-01-21-P-66.jpg CÓDIGO FOTO: TOLI-24909-RAN-01-21-P-66- Fotografía: SI Nº TOLI: TOLI-24909 PARCELA: RAN-01 CÓDIGO: 21-P-66 Nº COLECTA: 66 NUEVOS COLECTORES: Laura Isabel Ramos COLECTORES: L. Ramos, E. Álvarez, J. Cabezas, J. Rodriguez & C. Ibañez Nº MUESTRAS MONTADAS: 1 Homologación: No homologado Nueva fecha del evento : 20/12/2018. Fecha del evento: 15/05/2014. Proyecto : Recursos Botánicos Disponibles en Línea (BRAVO) para la flora Colombiana Hábitat: Bosque húmedo tropical (bh-T) Continente: SA Pais: Colombia Estado/Provincia: Meta Municipio: Puerto López Centro poblado / Cabecera municipal: La Serranía Localidad: Reserva Natural El Amparo Elevación minima en metros: 200 Elevación maxima en metros: 250 Latitud: 4.020 Longitud original: -72.600 datum geodésico: WGS 84 Latitud decimal: 4.020 Longitud decimal: -72.600 Nombre cientifico: NN Reino: Plantae Filo: Magnoliophyta Clase: Equisetopsida Orden: Gentianales Familia nueva: Apocynaceae Género nuevo: NN : Apocynaceae genero herbario: NN Especie de herbario para TNRS: NN Especie corregida herbario y desde TNRS: Indet indet Familia corregida desde TNRS: Apocynaceae : 394

    Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′

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    First 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)

    Production of J/ψ and Υ mesons in pp collisions at s√=8 TeV

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    The production of J/ψ and Υ mesons in pp collisions at s√=8 TeV is studied with the LHCb detector. The J/ψ and Υ mesons are reconstructed in the μ + μ − decay mode and the signal yields are determined with a fit to the μ + μ − invariant mass distributions. The analysis is performed in the rapidity range 2. 0 < y < 4. 5 and transverse momentum range 0 < p T < 14 (15) GeV/c of the J/ψ (Υ) mesons. The J/ψ and Υ production cross-sections and the fraction of J/ψ mesons from b-hadron decays are measured as a function of the meson p T and y

    J. Rodriguez Fonnegra, Del contrato de compraventa y materias aledanas

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    J. Rodriguez Fonnegra, Del contrato de compraventa y materias aledanas. In: Revue internationale de droit comparé. Vol. 14 N°4, Octobre-décembre 1962. p. 835

    NN from Colombia collected by L. Ramos, E. Álvarez, J. Cabezas, J. Rodriguez & C. Ibañez #47

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    File Name: TOLI-24026-RAN-01-13-J-47.jpg CÓDIGO FOTO: TOLI-24026-RAN-01-13-J-47- Fotografía: SI Nº TOLI: TOLI-24026 PARCELA: RAN-01 CÓDIGO: 13-J-47 Nº COLECTA: 47 NUEVOS COLECTORES: Laura Isabel Ramos COLECTORES: L. Ramos, E. Álvarez, J. Cabezas, J. Rodriguez & C. Ibañez Nº MUESTRAS MONTADAS: 1 Homologación: No homologado Nueva fecha del evento : 20/12/2018. Fecha del evento: 27/11/2018. Proyecto : Recursos Botánicos Disponibles en Línea (BRAVO) para la flora Colombiana Hábitat: Bosque húmedo tropical (bh-T) Continente: SA Pais: Colombia Estado/Provincia: Meta Municipio: Puerto López Centro poblado / Cabecera municipal: La Serranía Localidad: Reserva Natural El Amparo Elevación minima en metros: 200 Elevación maxima en metros: 250 Latitud: 4.020 Longitud original: -72.600 datum geodésico: WGS 84 Latitud decimal: 4.020 Longitud decimal: -72.600 Nombre cientifico: NN Reino: Plantae Filo: Magnoliophyta Clase: Equisetopsida Orden: Sapindales Familia nueva: Sapindaceae Género nuevo: NN : Sapindaceae genero herbario: NN Especie de herbario para TNRS: NN Especie corregida herbario y desde TNRS: Indet indet Familia corregida desde TNRS: Sapindaceae : 3111</p
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