نتایج جستجو برای: upper limit to ρ
تعداد نتایج: 10689447 فیلتر نتایج به سال:
Using a sample of 58× 106 J/ψ events collected with the BESII detector, radiative decays J/ψ → γγV , where V = ρ or φ, are studied. A resonance around 1420 MeV/c2 (X(1424)) is observed in the γρ mass spectrum. Its mass and width are measured to be 1424 ± 10 (stat) ± 11 (sys) MeV/c2 and 101.0 ± 8.8 ± 8.8 MeV/c2, respectively, and its branching ratio B(J/ψ → γX(1424) → γγρ) is determined to be (1...
Background and Purpose: Absence from work, quitting job and turnover of nursing staff put a great burden on any health care system in terms of hiring, training and maintaining nurses. Studies suggest that those with higher job satisfaction are less likely to state being sick and indicate that there is a relationship between the nurses’ job satisfaction and their tendency to quit or ask for a...
Using a sample of 58× 106 J/ψ events collected with the BESII detector, radiative decays J/ψ → γγV , where V = ρ or φ, are studied. A resonance around 1420 MeV/c2 (X(1424)) is observed in the γρ mass spectrum. Its mass and width are measured to be 1424 ± 10 (stat) ± 11 (sys) MeV/c2 and 101.0 ± 8.8 ± 8.8 MeV/c2, respectively, and its branching ratio B(J/ψ → γX(1424) → γγρ) is determined to be (1...
Using a sample of 58× 106 J/ψ events collected with the BESII detector, radiative decays J/ψ → γγV , where V = ρ or φ, are studied. A resonance around 1420 MeV/c2 (X(1424)) is observed in the γρ mass spectrum. Its mass and width are measured to be 1424 ± 10 (stat) ± 11 (sys) MeV/c2 and 101.0 ± 8.8 ± 8.8 MeV/c2, respectively, and its branching ratio B(J/ψ → γX(1424) → γγρ) is determined to be (1...
Tamhane, Mehta and Liu [1] studied a two-stage group sequential procedure (GSP) for testing a primary and a secondary endpoint where the primary endpoint serves as a gatekeeper for the secondary endpoint. They assumed a simple setup of a bivariate normal distribution for the two endpoints with the correlation coefficient ρ between them being either an unknown nuisance parameter or a known const...
We consider a lattice gas with general short range interactions and a Kac potential Jγ(r) of range γ, γ > 0, evolving via particles hopping to nearest neighbor empty sites with rates which satisfy detailed balance with respect to the equilibrium measure. Scaling space like γ and time like γ, we prove that in the limit γ → 0 the macroscopic density profile ρ(r, t) satisfies the equation ∂ ∂t ρ(r...
A central limit theorem for bilinear forms of the type aĈN (ρ) −1b, where a, b ∈ C are unit norm deterministic vectors and ĈN (ρ) a robust-shrinkage estimator of scatter parametrized by ρ and built upon n independent elliptical vector observations, is presented. The fluctuations of aĈN (ρ) −1b are found to be of order N− 1 2 and to be the same as those of aŜN (ρ) −1b for ŜN (ρ) a matrix of a th...
Let D be a strongly connected digraph. The average distance σ̄(v) of vertex v is the arithmetic mean distances from to all other vertices D. remoteness ρ(D) and proximity π(D) are maximum minimum D, respectively. We obtain sharp upper lower bounds on as function order n describe extreme digraphs for bounds. also such strong tournaments. show that tournament T, we have π(T)=ρ(T) if only T regular...
Measurements of temperature-dependent in-plane resistivity ρ(T) were used to determine the upper critical field and its anisotropy in high-quality single crystals of the stoichiometric iron arsenide superconductor KFe2As2. The crystals were characterized by the residual resistivity ratio ρ(300 K)/ρ(0) up to 3000 and the resistive transition midpoint temperature Tc=3.8 K, significantly higher th...
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