نتایج جستجو برای: interferon υ ifn υ
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An algorithm for the reconstruction of muon pairs produced in heavy ions collisions and detected in the CMS barrel is presented. With an efficiency of 66% for the Υ(1S)-decay dimuons in the case of central Pb-Pb collisions it enhances the Signal/Background ratio by a factor 6 in the pseudorapidity region −0.8 < η < 0.8. For the interval 0.8 < |η| < 1.5 the evaluated efficiency is 45% for Υ deca...
We prove that if K is a Gruenhage compact space then C (K) admits an equivalent, strictly convex dual norm. As a corollary, we show that if X is a Banach space and X∗ = span|||·|||(K), where K is a Gruenhage compact in the w∗-topology and ||| · ||| is equivalent to a coarser, w∗-lower semicontinuous norm on X∗, then X∗ admits an equivalent, strictly convex dual norm. We give a partial converse ...
The vision of Υ-DB introduces deterministic scientific hypotheses as a kind of uncertain and probabilistic data, and opens some key technical challenges for enabling data-driven hypothesis management and analytics. The Υ-DB system addresses those challenges throughout a design-by-synthesis pipeline that defines its architecture. It processes hypotheses from their XML-based extraction to encodin...
We report the observation of two narrow structures in the mass spectra of the π(±)Υ(nS) (n=1, 2, 3) and π(±)h(b)(mP) (m=1, 2) pairs that are produced in association with a single charged pion in Υ(5S) decays. The measured masses and widths of the two structures averaged over the five final states are M(1)=(10,607.2±2.0) MeV/c2, Γ(1)=(18.4±2.4) MeV, and M(2)=(10,652.2±1.5) MeV/c2, Γ(2)=(11.5±...
We give an overview of the present status of knowledge of the production of J/ψ, ψ′ and Υ in high-energy hadron collisions. We first present two early models, namely the ColourSinglet Model (CSM) and the Colour-Evaporation Model (CEM). The first is the natural application of pQCD to quarkonium production and has been shown to fail dramatically to describe experimental data, the second is its ph...
The production of prompt J/ψ, ψ(2S), χc1 and χc2 is studied using a 32.4 fb data sample collected with the Belle detector at the Υ(4S) and 60 MeV below the resonance. The yield of prompt J/ψ mesons in the Υ(4S) sample is compatible with that of continuum production; we set an upper limit B(Υ(4S) → J/ψX) < 1.9 × 10−4 at the 95% confidence level, and find σ(e+e− → J/ψX) = 1.47 ± 0.10 ± 0.13 pb. T...
The role of pion rescattering in ππ decay of radially excited heavy quarkonia modeled in terms of a Qππ coupling, is investigated within the framework of the covariant Blankenbecler-Sugar equation. The effects of pion rescattering (or pion exchange) are shown to be large, unless the coupling of the two-pion system to the heavy quarks is mediated by a fairly light scalar σ meson, which couples t...
Proof of Proposition 1. See the Online Appendix. Let H(A) and L(A) be the maximum and minimum values of the equilibrium value correspondence V . Because the graph of V is closed, H is usc and L is lsc. We now describe the supremum of continuation values that a deviating individual can obtain. Let x be a feasible choice of continuation asset at A. Consider all limits of sequences of the form {L(...
A problem which is frequently encountered in practice is that of deciding whether some sets of quantitative data are all derived from the same distribution. In this context consider υ independent random samples X = ( X 1 , ..., X (1) n1∗ )t ,...,X = ( X 1 , ..., X (υ) nυ∗ )t , of sizes n1∗, ..., nυ∗ respectively. The question is now to decide if the samples X, ...,X are all derived from the sam...
The aim of this work is to establish the stability of mean-field system under non-convex confining potential. A mean-field system corresponds to a system of N particles in weak interaction and confined by an exterior force. With our hypotheses, it is a Kolmogorov diffusion with potential Υ N . Exit time of these systems have been studied in details in the smallnoise limit. Here, we will deal wi...
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