116,558 research outputs found
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
Rhinocricus vacariensis Rodrigues, Ott & Rodrigues, 2012, sp. nov.
No full textRhinocricus vacariensis sp. nov. (Figs. 30–34) Types. Holotype male from Vacaria, Rio Grande do Sul, Brazil, 29.III. 1987, C. S. Marros leg. (MCN 246). Etymology. The species epithet is a noun in apposition, referring to the type locality. Diagnosis. Rhinocricus vacariensis is close to Rhinocricus itauba by the distal small groove in the sternite of the anterior gonopod, but differs from this species by the posterior gonopod having the solenomere with rounded apex, and not indented as in R. itauba. Description. Male, holotype (Figs. 33, 34). With 54 segments. Length 78. Width 7. Clypeus olive-brown with spaced 2 – 2 supra-labial setae. Labrum yellowish-brown with 11 – 11 setae. Antennae brown, with numerous sensory cones (more than 20). Collum olive-brown with yellowish margins and rounded ventro-lateral borders. Prozonites olive-brown. Metazonites brown with yellowish margins; posterior ones with more intense yellow at margins. Segments 47–53 with whitish pseudosuture. Epiproct faded olive, yellowish and rounded distally, surpassing the paraproct. Paraproct olivaceous. Hypoproct yellowish. Legs brown, with enlongated coxae at third and fourth pairs. Ocelli black arranged in five rows in the following numeric order (dorsal to ventral): 9, 8, 7, 5, 4 right and 9, 8, 7, 5, 4 left. Ozopores black, beginning in the sixth segment. Scobinae beginning at eighth segment. Anterior gonopod (Figs. 30, 31). Sternite triangular, with small groove distally, not surpassing the coxite and the telepodite. Telepodite with rounded distal lobe. Wide coxite, internal lobe sharp distally not surpassing telepodite. Posterior gonopod (Fig. 32). Solenomere sharp and dug distally, longer as tibiotarsus. Tibiotarsus enlarged from its origin, apex lamellated. Female. Unknown. Distribution. Known only from the type locality (Vacaria, state of Rio Grande do Sul, Brazil).Published as part of Rodrigues, Patrícia E. S., Ott, Ricardo & Rodrigues, Everton N. L., 2012, New species and new records of millipedes of the genus Rhinocricus Karsch, 1881 (Spirobolida: Rhinocricidae) from southern Brazil, pp. 55-64 in Zootaxa 3172 on page 62, DOI: 10.5281/zenodo.21010
Prompt charm production in pp collisions at √<span style="text-decoration:overline">s</span>=7 TeV
No full textCharm production at the LHC in pp collisions at s√=7 TeV is studied with the LHCb detector. The decays D0→K−π+, D+→K−π+π+, D⁎+→D0(K−π+)π+, D+s→ϕ(K−K+)π+, Λ+c→pK−π+, and their charge conjugates are analysed in a data set corresponding to an integrated luminosity of 15 nb−1. Differential cross-sections dσ/dpT are measured for prompt production of the five charmed hadron species in bins of transverse momentum and rapidity in the region 0<pT<8 GeV/c and 2.0<y<4.5. Theoretical predictions are compared to the measured differential cross-sections. The integrated cross-sections of the charm hadrons are computed in the above pT-y range, and their ratios are reported. A combination of the five integrated cross-section measurements gives
σ(cc¯)pT<8 GeV/c,2.0<y<4.5=1419±12(stat)±116(syst)±65(frag) μb,
where the uncertainties are statistical, systematic, and due to the fragmentation functions
Rhinocricus guaritas Rodrigues, Ott & Rodrigues, 2012, sp. nov.
No full textRhinocricus guaritas sp. nov. (Figs. 16–22) Types. Holotype male from Caçapava do Sul, Rio Grande do Sul, Brazil, 29.X. 1975, P. C. Braum leg. (MCN 062). Paratype female, same data as the holotype (MCN 735). Etymology. The epithet refers to the name of a geological formation very characteristic and beautiful, found in the type locality. Diagnosis. Rhinocricus guaritas is close to Rhinocricus balanus Chamberlin, 1955 by the similar shape of the anterior gonopod sternite with narrowed base and evident coxites, but differs from R. balanus by the longer and broader median process of the sternite (Fig. 16). Description. Male, holotype (Figs. 19, 20). With 51 segments. Length 67. Width 6. Clypeus olivaceous with spaced 2 – 2 supra-labial setae. Labrum yellowish-brown with 10 – 10 setae. Antennae brown, numerous sensory cones (around 18). Collum olivaceous, with yellowish margins and ventro-lateral rounded borders. Prozonites grayish-olive; metazonites olive-brown with yellowish-brown borders. Epiproct olive, distally yellowish-brown and rounded, surpassing the paraproct. Paraproct dark-olive. Hypoproct yellowish-brown. Legs brown, with third and fourth coxae elongate. Ocelli dark-brown, disposed in seven rows, in the following numeric order (dorsal to ventral): 8, 9, 8, 8, 6, 4, 1, right and 8, 8, 8, 7, 6, 4, 3, left. Ozopores dark-brown, beginning at sixth segment. Scobinae beginning at seventh segment. Anterior gonopod (Figs. 16, 17). Sternite with broad-base and sharp distal end, not surpassing the length of coxites and telepodites. Coxite longer than wide, internal lobe of the same size as telepodite. Telepodite with small rounded lobe. Posterior gonopod (Fig. 18). Solenomere longer than tibiotarsus, with sharp pointed and laminate distal end. Tibiotarsus lamellate, externally with small rounded salience, internally with sharp and projected apex. Female, paratype (Figs. 21, 22). As male except as noted. With 52 segments. Length 85. Width 7. Coloration as in male, except the lighter colored metazonites, which have a more orange-colored border. Labrum with 10 – 10 labral setae. Antennae with numerous sensory cones. Ocelli in seven rows in the following numeric order (dorsal to ventral): 7, 9, 9, 8, 6, 5, 3 right and 5, 7, 9, 7, 5, 4, 2 left. Ozopores beginning at sixth segment, first pore located below the line of others (on the left lacking pores from 13 to 16 segment). Scobinae beginning from seventh segment. Distribution: Known only from the type locality (Caçapava do Sul, state of Rio Grande do Sul, Brazil).Published as part of Rodrigues, Patrícia E. S., Ott, Ricardo & Rodrigues, Everton N. L., 2012, New species and new records of millipedes of the genus Rhinocricus Karsch, 1881 (Spirobolida: Rhinocricidae) from southern Brazil, pp. 55-64 in Zootaxa 3172 on pages 59-60, DOI: 10.5281/zenodo.21010
Measurement of the inclusive φ cross-section in pp collisions at √s=7 TeV
No full textThe cross-section for inclusive φ meson production in pp collisions at a centre-of-mass energy of √s = 7 TeV has been measured with the LHCb detector at the Large Hadron Collider. The differential cross-section is measured as a function of the φ transverse momentum pT and rapidity y in the region 0.6< pT <5.0 GeV/c and 2.44< y <4.06. The cross-section for inclusive φ production in this kinematic range is σ(pp→φX)=1758±19(stat) +43−14(syst)±182(scale) μb, where the first systematic uncertainty depends on the pT and y region and the second is related to the overall scale. Predictions based on the Pythia 6.4 generator underestimate the cross-section
Data sets for "MELISSA: System description and spectral features of pre‐ and post‐midnight F‐region echoes. Journal of Geophysical Research: Space Physics" by Rodrigues et al.
No full textObservations used in the study "Rodrigues, F. S., Zhan, W., Milla, M. A., Fejer, B. G., de Paula, E. R., Neto, A. C., et al ( 2019). MELISSA: System description and spectral features of pre‐ and post‐midnight F‐region echoes. Journal of Geophysical Research: Space Physics, 124. https://doi.org/10.1029/2019JA027445."
The uploaded files include the RTI maps measured by the MELISSA radar system between 2014 and 2018 (.tif files). They also include values of SNR versus local time and height and the spectra presented in the manuscript (.mat files).
Please, see README.txt for additional details.</p
Eliane Rodrigues and Jose-Maria Martinez Pinzolas, Preliminaries Phase I, 5th Van Cliburn Competition (1977)
No full textKeyboard partita no. 6 in E minor, BWV 830. Toccata / J. S. Bach ; Piano sonata no. 17 in D minor, op. 31, no. 2. Largo - Allegro / Beethoven ; Ballade no. 2 in F major, op. 38 / Chopin (Rodrigues) -- Ballade no. 4 in F minor, op. 52 / Chopin ; Piano sonata no. 8 in C minor, op. 13. Grave - Allegro di molto e con brio / Beethoven (PARTIAL) ; Piano sonata no. 8 in C minor, op. 13. Rondo: Allegro / Beethoven (Pinzolas)
Observations of Bºs→ψ(2S)η and Bº(s)→ψ(2S)π+π- decays
No full textFirst observations of the B0s
→ψ(2S)η, B0 →ψ(2S)π
+
π
− and B0s
→ψ(2S)π
+
π
− decays are made
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
√
s = 7 TeV. The ratios of the branching fractions
of each of the ψ(2S) modes with respect to the corresponding J/ψ decays are
B(B0s
→ψ(2S)η)
÷
B(B0s
→J/ψη)
= 0.83± 0.14 (stat)±0.12 (syst) ±0.02 (B),
;
B(B0→ψ(2S)π
+
π
−
)
÷
B(B0→J/ψπ
+
π
−
)
= 0.56± 0.07 (stat)±0.05 (syst)± 0.01 (B),
;
B(B0s
→ψ(2S)π
+
π
−
)
÷
B(B0s
→J/ψπ
+
π
−
)
= 0.34± 0.04 (stat)±0.03 (syst)± 0.01 (B),
where the third uncertainty corresponds to the uncertainties of the dilepton branching fractions of the J/ψ
and ψ(2S) meson decays
Eliane Rodrigues and Jose-Maria Martinez Pinzolas, Preliminaries Phase I, 5th Van Cliburn Competition (1977)
No full textKeyboard partita no. 6 in E minor, BWV 830. Toccata / J. S. Bach ; Piano sonata no. 17 in D minor, op. 31, no. 2. Largo - Allegro / Beethoven ; Ballade no. 2 in F major, op. 38 / Chopin (Rodrigues) -- Ballade no. 4 in F minor, op. 52 / Chopin ; Piano sonata no. 8 in C minor, op. 13. Grave - Allegro di molto e con brio / Beethoven (PARTIAL) ; Piano sonata no. 8 in C minor, op. 13. Rondo: Allegro / Beethoven (Pinzolas)
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