38,651 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)
Use Of Pedotransfer Functions And Terrain Analysis To Predict Soil Hydraulic Properties Along A Hillslope Transect
No full textThis study examines how well PTFs perform that
use both basic soil physical and chemical properties and topographical attributes for a
hillslope in Southern Italy
Use of neural networks and terrain analysis for determining soil hydrologic response at hillslope scale
No full text[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.
Topographical attributes to predict soil hydraulic properties along a hillslope transect
No full textBasic soil properties have long been used to predict unsaturated soil hydraulic properties
with pedotransfer function (PTFs). Implementation of such PTFs is usually not feasible for
catchment-scale studies because of the experimental effort that would be required. On the
other hand, topographical attributes are often readily available. This study therefore
examines how well PTFs perform that use both basic soil properties and topographical
attributes for a hillslope in Basilicata, Italy. Basic soil properties and hydraulic data were
determined on soil samples taken at 50-m intervals along a 5-km hillslope transect.
Topographical attributes were determined from a digital elevation model. Spearman
coefficients showed that elevation (z) was positively correlated with organic carbon (OC)
and silt contents (0.62 and 0.59, respectively) and negatively with bulk density (rb) and sand
fraction (0.34 and 0.37). Retention parameters were somewhat correlated with
topographical attributes z, slope (b), aspect (cosf), and potential solar radiation. Water
contents were correlated most strongly with elevation (coefficient between 0.38 and 0.48)
and aspect during ‘‘wet’’ conditions. Artificial neural networks (ANNs) were developed for
21 different sets of predictors to estimate retention parameters, saturated hydraulic
conductivity (Ks), and water contents at capillary heads h = 50 cm and 12 bar (103 cm). The
prediction of retention parameters could be improved with 10% by including topography
(RMSE = 0.0327 cm3 cm3) using textural fractions, rb, OC, z, and b as predictors.
Furthermore, OC became a better predictor when the PTF also used z as predictor. The water
content at h = 50 cm could be predicted 26% more accurately (RMSE = 0.0231 cm3cm3)
using texture, rb, OC, z, b, and potential solar radiation as input. Predictions of ANNs
with and without topographical attributes were most accurate in the wet range (0 < h <
250 cm). Semivariograms of the hydraulic parameters and their residuals showed that the
ANNs could explain part of the (spatial) variability. The results of this study confirm the
utility of topographical attributes such as z, b, cosf, and potential solar radiation as predictors
for PTFs when basic soil properties are available. A next step would be the use of
topographical attributes when no or limited other predictors are available
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
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
K. F. C. Rose, The date and author of the Satyricon, with an introduction by J. P. Sullivan, 1971
No full textRastier Françoise. K. F. C. Rose, The date and author of the Satyricon, with an introduction by J. P. Sullivan, 1971. In: Revue des Études Anciennes. Tome 74, 1972, n°1-4. pp. 300-303
K. F. C. Rose, The Date and Author of the Satyricon. With an Introduction by J. P. Sullivan
No full textVerdière Raoul. K. F. C. Rose, The Date and Author of the Satyricon. With an Introduction by J. P. Sullivan. In: L'antiquité classique, Tome 42, fasc. 1, 1973. pp. 279-280
K. F. C. Rose, The date and author of the Satyricon, with an introduction by J. P. Sullivan, 1971
No full textRastier Françoise. K. F. C. Rose, The date and author of the Satyricon, with an introduction by J. P. Sullivan, 1971. In: Revue des Études Anciennes. Tome 74, 1972, n°1-4. pp. 300-303
- …
