نتایج جستجو برای: interferon υ ifn υ
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We review recent progress on the study of quarkonium production with the STAR detector. We discuss the results of a J/ψ → ee test trigger for p + p collisions during Run V at RHIC. For the Au+Au data from Run IV, we discuss the implementation of a test trigger for Υ → ee. We obtain an upper limit on Υ production from the test trigger data. The prospects for future runs with upgraded detectors a...
The cross section ratio RJ/ψ = Br(Υ → l+l−) · dσ(Υ )/dy|y=0/σ(J/ψ) has been measured with the HERA-B spectrometer in fixed-target proton–nucleus collisions at 920 GeV proton beam energy corresponding to a proton–nucleon c.m.s. energy of √ s = 41.6 GeV. The combined results for the decay channels Υ → e+e− and Υ → μ+μ− yield a ratio RJ/ψ = (9.0 ± 2.1)× 10−6. The corresponding Υ production cross s...
According to the idea of Ozsváth, Stipsicz and Szabó, we define knot invariant [Formula: see text] without holomorphic theory, using constructions from grid homology. We develop a homology theory diagrams, show that text], as introduced this way, is well-defined invariant. reprove some important propositions new techniques, provides lower bound on unknotting number.
Semi-deteministic optimization methods We consider with : J Ω → Ω ⊂. We make the following assump tions: 1 (,) J C ∈ Ω and is coercive. The infimum of J is denoted by J m (when J m is unknown, we set J m to a low value). Many deterministic minimization algorithms can be seen as discrete dynamical systems coming from the discretization of first or second order Cauchy problems. On the other hand,...
We report on the first results of a search for molecular hydrogen emission from protoplanetary disks using CRIRES, ESO's new VLT Adaptive Optics high resolution near-infrared spectrograph. We observed the classical T Tauri star LkHα 264 and the debris disk 49 Cet, and searched for υ = 1 − 0 S(1) H 2 emission at 2.1218 µm, υ = 1 − 0 S(0) H 2 emission at 2.2233 µm and υ = 2 − 1 S(1) H 2 emission ...
No spin-singlet bb̄ quarkonium state has yet been observed. In this paper we discuss the production of the singlet P-wave bb̄ and cc̄ P1 states hb and hc. We consider two possibilities. In the first the P1 states are produced via the electromagnetic cascades Υ(3S) → ηb(2S)+γ → hb+γγ → ηb+γγγ and ψ → η c+γ → hc+γγ → ηc+γγγ. A more promising process consists of single pion transition to the P1 state...
No spin-singlet bb̄ quarkonium state has yet been observed. In this paper we discuss the production of the singlet P-wave bb̄ and cc̄ P1 states hb and hc. We consider two possibilities. In the first the P1 states are produced via the electromagnetic cascades Υ(3S) → ηb(2S)+γ → hb+γγ → ηb+γγγ and ψ → η c+γ → hc+γγ → ηc+γγγ. A more promising process consists of single pion transition to the P1 state...
We develop easy-to-verify conditions assuring that comparative statics in a general equilibrium model where time is a real line is feasible, i.e., the implicit function theorem is applicable. Consider an equilibrium equation, Υ(k,E) = k of a model where an equilibrium variable (k) is a continuous bounded function of time, real line, and the policy parameter (E) is a locally integrable function ...
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