43,218 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)
Measurement of the ratio of branching fractions B(B0→K∗0γ )/B(B0s→φγ ) and the directCP asymmetry inB 0→K∗0γ
No full textThe ratio of branching fractions of the radiative B decays B0→K⁎0γ and B0s→ϕγ has been measured using an integrated luminosity of 1.0 fb−1 of pp collision data collected by the LHCb experiment at a centre-of-mass energy of s√=7TeV. The value obtained is
B(B0→K⁎0γ)B(B0s→ϕγ)=1.23±0.06(stat.)±0.04(syst.)±0.10(fs/fd),
where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions fs/fd. Using the world average value for B(B0→K⁎0γ), the branching fraction B(B0s→ϕγ) is measured to be (3.5±0.4)×10−5.
The direct CP asymmetry in B0→K⁎0γ decays has also been measured with the same data and found to be
ACP(B0→K⁎0γ)=(0.8±1.7(stat.)±0.9(syst.))%.
Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations
Dolicholana brucei Paiva & Souza-Filho 2015
No full text<i>Dolicholana brucei</i> Paiva & Souza-Filho, 2015 <p> <b>Material examined.</b> 1 female (9.5 mm), Revizee Central, station # 6752, Box Corer, 16°49’58.8”S 38°35’27.6”W, 250 m, 21 June 2002, MNRJ 20209.</p> <p> <b>Distribution.</b> Rio Grande do Norte and Bahia (Brazil), 150–250 m depth.</p> <p> <b>Remarks.</b> <i>Dolicholana brucei</i> was described from material collected from the Potiguar Basin, off Rio Grande do Norte (Brazil), at a depth of 150 m. Its latitudinal distribution is now extended southward to Bahia and its depth range to 250 m. The female specimen examined here agrees with the original description, although the two distal robust setae of the pleotelson are broken.</p>Published as part of <i>Paiva, Ricardo J. C. & Souza-Filho, Jesser F., 2023, Three new species of the family Cirolanidae Dana, 1852 (Isopoda, Cymothoida) from the shallow Brazilian bathyal, pp. 1-26 in Zootaxa 5319 (1)</i> on page 2, DOI: 10.11646/zootaxa.5319.1.1, <a href="http://zenodo.org/record/8181996">http://zenodo.org/record/8181996</a>
Measurement of b-hadron masses
No full textMeasurements of b-hadron masses are performed with the exclusive decay modes B +→J/ψK +, B 0→J/ψK +, B0→J/ψKS0, Bs0→J/ψφ and Λb0→J/ψΛ using an integrated luminosity of 35pb -1 collected in pp collisions at a centre-of-mass energy of 7 TeV by the LHCb experiment. The momentum scale is calibrated with J/ψ→μ +μ - decays and verified to be known to a relative precision of 2 ×10 -4 using other two-body decays. The results are more precise than previous measurements, particularly in the case of the Bs0 and Λb0 masses
Corrigendum to “Presence and function of kisspeptin/KISS1R system in swine ovarian follicles” (Theriogenology (2018) 115 (1–8), (S0093691X1830147X), (10.1016/j.theriogenology.2018.04.006))
No full textThe authors regret the following changes to the author group G. Basinia, F. Grassellia, S. Bussolatia, R. Ciccimarraa, M. Maranesib, A. Bufalarib, C. Dall'Agliob, F. Parilloc,#, M. Zeranib,c,*. a Dipartimento di Scienze Mediche Veterinarie, Università di Parma, 43126 Parma, Italy. b Dipartimento di Medicina Veterinaria, Università di Perugia, 06126 Perugia Italy. c Scuola di Bioscienze e Medicina Veterinaria, Università di Camerino, 62024 Matelica Italy. # Deceased. * Corresponding author: tel.: +39 0755857642; fax +39 0755857654. E-mail address: [email protected] (M. Zerani). And to the acknowledgements and figures
Testing protoplanetary disc dispersal with radio emission
No full textWe consider continuum free–free radio emission from the upper atmosphere of protoplanetary discs as a probe of the ionized luminosity impinging upon the disc. Making use of previously computed hydrodynamic models of disc photoevaporation within the framework of extreme-ultraviolet (EUV) and X-ray irradiation, we use radiative transfer post-processing techniques to predict the expected free–free emission from protoplanetary discs. In general, the free–free luminosity scales roughly linearly with ionizing luminosity in both EUV- and X-ray-driven scenarios, where the emission dominates over the dust tail of the disc and is partial optically thin at cm wavelengths. We perform a test observation of GM Aur at 14–18?GHz and detect an excess of radio emission above the dust tail to a very high level of confidence. The observed flux density and spectral index are consistent with free–free emission from the ionized disc in either the EUV- or the X-ray-driven scenario. Finally, we suggest a possible route to testing the EUV- and X-ray-driven dispersal model of protoplanetary discs, by combining observed free–free flux densities with measurements of mass-accretion rates. On the point of disc dispersal one would expect to find an M?2? scaling with free–free flux in the case of EUV-driven disc dispersal or an ?* scaling in the case of X-ray-driven disc dispersa
Estrategias felinas: discurso poetico X midia na poesia brasileira contemporanea : Armando Freitas Filho e Sebastião Uchoa Leite
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e ExpressãoA presente dissertação analisa na produção textual de Armando Freitas Filho e Sebastião Uchoa Leite o conflito entre a mídia, como veiculadora de discursos homogeneizantes na sociedade, e o discurso poético como voz alternativa, marcada pela singularidade e pelo exercício crítico em relação às noções de sujeito, subjetividade, verdade, discurso. Para isso, foram estudadas principalmente obras escritas nos anos 1980
Branching fraction and CP asymmetry of the decays B+→K0Sπ+ and B+→K0SK+
No full textAn analysis of B+ → K0
Sπ+ and B+ → K0
S K+ decays is performed with the LHCb experiment. The pp
collision data used correspond to integrated luminosities of 1 fb−1 and 2 fb−1 collected at centre-ofmass
energies of
√
s = 7 TeV and
√
s = 8 TeV, respectively. The ratio of branching fractions and the
direct CP asymmetries are measured to be B(B+ → K0
S K+
)/B(B+ → K0
Sπ+
) = 0.064 ± 0.009 (stat.) ±
0.004 (syst.), ACP(B+ → K0
Sπ+
) = −0.022 ± 0.025 (stat.) ± 0.010 (syst.) and ACP(B+ → K0
S K+
) =
−0.21 ± 0.14 (stat.) ± 0.01 (syst.). The data sample taken at
√
s = 7 TeV is used to search for
B+
c
→ K0
S K+ decays and results in the upper limit ( fc · B(B+
c
→ K0
S K+
))/( fu · B(B+ → K0
Sπ+
)) <
5.8 × 10−2 at 90% confidence level, where fc and fu denote the hadronisation fractions of a ¯b
quark
into a B+
c or a B+ meson, respectively
FIGURE 2 in Four new species and an identification key for Stygodesmodora Blome, 1982 (Nematoda: Spiriniinae) from the continental shelf off northeastern Brazil
No full textFIGURE 2. Stygodesmodora amphidialis sp. n. Holotype male MNRJ 367. A: Head region; B: Overview; C: Tail region; D: Copulatory apparatus; E: Anterior region.Published as part of Larrazábal-Filho, Alexandre L., Neres, Patrícia F. & Esteves, André M., 2017, Zootaxa 4294 (1), DOI: 10.11646/zootaxa.4294.1.2, http://zenodo.org/record/83159
Adelmo Genro Filho e a teoria do jornalismo no Brasil: uma análise crítica
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas, Programa de Pós-Graduação em Sociologia Política, Florianópolis, 2015.A afirmação de Adelmo Genro Filho, em "O Segredo da Pirâmide: para uma teoria marxista do jornalismo", de que o jornalismo é uma forma de conhecimento cristalizada no singular mobilizou jornalistas, pesquisadores e professores nos últimos 27 anos para instituição e legitimidade das teorias do jornalismo no Brasil. Com o arcabouço teórico e filosófico da Ontologia Crítica de Marx e Lukács, este estudo expõe as mediações presentes na produção e recepção da teoria, bem como os conceitos filosóficos que fundamentam a assertiva de Genro Filho. O trabalho divide-se em duas partes interdependentes. Na primeira, são trabalhadas as principais questões que se impunham para o jornalismo brasileiro nos anos 1980 (com ênfase para a formação acadêmica, a escrita jornalística e a hierarquia dos profissionais), a biografia do autor e o modo como o livro foi recepcionado pelos professores e pesquisadores em jornalismo no Brasil. A segunda parte reconstitui as bases filosóficas do livro, recuperando o entendimento ontológico do autor e o modo como esses fundamentos otimizam sua compreensão do jornalismo como forma de conhecimento. O objetivo é o de demonstrar como as escolhas teóricas do autor possuem estreita ligação com sua biografia e o modo como ele compreendia as questões de sua época. Ao passo que, por meio de análise do modo de recepção do livro, foi possível estabelecer uma cartografia da produção brasileira com base em 411 textos que citam "O Segredo da Pirâmide", evidenciando que o processo de institucionalização para a defesa do jornalismo como profissão, graduação especializada e com teorias específicas coincide com esse mapa. Paradoxalmente, demonstra-se que o processo de recepção do livro se faz acompanhar de uma negação da peculiar base marxista que o fundamenta, o que motiva o estudo detalhado das categorias utilizadas por Genro Filho.Abstract : In the book ?O Segredo da Pirâmide: para uma teoria marxista do jornalismo" [?The Secret of the Pyramid: for a Marxist theory of journalism"], Adelmo Genro Filho stated that journalism is a form of knowledge that is crystallized in the singular. This statement has mobilized journalists, researchers and professors over the last 27 years for the institution and legitimacy of theories of journalism in Brazil. With the theoretical and philosophical framework of Critical Ontology of Marx and Lukács, this study exposes the mediations present in the production and reception of the theory and the philosophical concepts that ground the Genro Filho's statement. The work is divided into two interdependent parts. At first, the text brings the main issues that were necessary to the Brazilian journalism in the 1980s (with emphasis on the academic, journalistic writing and the hierarchy of professionals), the author's biography and how the book was received by professors and researchers on journalism in Brazil. The second part reconstitutes the philosophical bases of the book, recovering the ontological understanding of the author towards journalism and how those fundamentals optimize the understanding of journalism as a form of knowledge proposed by the author. The objective was to demonstrate how the author's theoretical choices have close connection with his biography and how he understood the issues of his time. Simultaneously, through the analysis about the book's reception, it was possible to establish a cartography of the Brazilian production based on 411 texts mentioning "The Secret of the Pyramid", evidencing that the process of institutionalization for the defense of journalism as a profession, specialized graduation and with specific theories coincides with that map. Paradoxically, it is demonstrated that the book's reception process is accompanied by a denial of peculiar Marxist basis underlying it, which motivates the detailed study of the categories used by Genro Filho
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