49,066 research outputs found
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
FIGURE 1 in Redescription of the larva of Amblyomma oblongoguttatum Koch, 1844 (Acari: Ixodidae) by light and scanning electron microscopy
No full textFIGURE 1. Amblyomma oblongoguttatum larva. Gnathosoma dorsal (right) and ventral (left) views. Abbreviations: d—dorsal; v—ventral; a—antiaxial; p—paraxial; t—terminal; F—femur; G—genu; Tt—tibiotarsus.Published as part of Barbieri, Fabio S., Brito, Luciana G., Barros-Battesti, Darci M., Famadas, Kátia M., Labruna, Marcelo B. & Camargo, Luis Marcelo A., 2012, Redescription of the larva of Amblyomma oblongoguttatum Koch, 1844 (Acari: Ixodidae) by light and scanning electron microscopy, pp. 80-88 in Zootaxa 3579 on page 82, DOI: 10.5281/zenodo.28302
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
FIGURES 8–13 in Ornithodoros guaporensis (Acari, Ixodida: Argasidae), a new tick species from the Guaporé River Basin in the Bolivian Amazon
No full textFIGURES 8–13. Adults of Ornithodoros guaporensis. 8. Female, dorsal idiosoma. 9. Female, ventral idiosoma. 10. Female, capitulum, ventral view. 11. Male, ventral idiosoma. 12. Female, hypostome. 13. Female, capsule of Haller's organ. Note: Male is similar to the female except for the genital area (see figure 11).Published as part of Nava, Santiago, Venzal, José M., Terassini, Flavio A., Mangold, Atilio J., Camargo Gustavo Casás, Luis M. A. & Labruna, Marcelo B., 2013, Ornithodoros guaporensis (Acari, Ixodida: Argasidae), a new tick species from the Guaporé River Basin in the Bolivian Amazon, pp. 579-590 in Zootaxa 3666 (4) on page 584, DOI: 10.11646/zootaxa.3666.4.10, http://zenodo.org/record/526616
Validation of the taxon Ixodes aragaoi Fonseca (Acari: Ixodidae) based on morphological and molecular data
No full textOnofrio, Valeria C., Ramirez, Diego G., Giovanni, Dalton N. S., Marcili, Arlei, Mangold, Atilio J., Venzal, José M., Mendonça, Ronaldo Z., Labruna, Marcelo B., Barros-Battesti, Darci M. (2014): Validation of the taxon Ixodes aragaoi Fonseca (Acari: Ixodidae) based on morphological and molecular data. Zootaxa 3860 (4): 361-370, DOI: 10.11646/zootaxa.3860.4.
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 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
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
FIGURES 6–10. Ixodes luciae larva. 6. Gnathosoma dorsal view. 7 in Description of immature stages and redescription of adults of Ixodes luciae Sénevet (Acari: Ixodidae)
No full textFIGURES 6–10. Ixodes luciae larva. 6. Gnathosoma dorsal view. 7. Gnathosoma ventral view with hypostome rounded (arrowed). 7a. Tibiotarsus setae (arrowed). 8. Idiosoma dorsal. 9. Idiosoma ventral, coxae and anal groove (arrowed). 10. Tarsus I with four posthalleral setae (arrowed). Abbreviations: CHO, capsule of Haller's organ; Ph, posthypostomal setae; pha, prehalleral setae. Scale-bars: 6, 20 μm; 7, 40 μm; 7a, 20 μm; 8, 120 μm; 9, 40 μm; 10, 12 μm.Published as part of Onofrio, Valeria C., Labruna, Marcelo B., Faccini, João Luiz H. & Barros-Battesti, Darci M., 2010, Description of immature stages and redescription of adults of Ixodes luciae Sénevet (Acari: Ixodidae), pp. 53-64 in Zootaxa 2495 (1) on page 57, DOI: 10.11646/zootaxa.2495.1.2, http://zenodo.org/record/530376
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
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