نتایج جستجو برای: ψ
تعداد نتایج: 8567 فیلتر نتایج به سال:
Using (448.1±2.9)×106 ψ(3686) events collected with the BESIII detector and a single-baryon tagging technique, we present first observation of decays ψ(3686)→Ξ(1530)0Ξ¯(1530)0 Ξ(1530)0Ξ¯0. The branching fractions are measured to be B(ψ(3686)→Ξ(1530)0Ξ¯(1530)0)=(6.77±0.14±0.39)×10−5 B(ψ(3686)→Ξ(1530)0Ξ¯0)=(0.53±0.04±0.03)×10−5. Here, second uncertainties statistical systematic, respectively. In ...
In this study, thin layers of titanium nitride (TiN) were deposited on H13 steel substrates at different duty cycles and temperature of 520 ˚C using plasma assisted chemical vapor deposition (PACVD). Uniaxial residual stress was calculated by X-ray diffraction (XRD) and Sin2 Ψ method. Then the residual stress of the samples were measured by Grazing Incidence X-ray Diffraction (GIXRD) method and...
Color-suppressed decays of B mesons to final states with ψ(2S) mesons have been observed with the CLEO detector. The branching fractions for the decays B+ → ψ(2S)K+, B+ → ψ(2S)K∗(892)+, B0 → ψ(2S)K0, and B0 → ψ(2S)K∗(892)0 are measured to be (7.8±0.7±0.9)×10−4 , (9.2±1.9± 1.2)× 10−4, (5.0± 1.1± 0.6)× 10−4, and (7.6± 1.1± 1.0)× 10−4, respectively, where the first uncertainty is statistical and t...
Steingrimsson (2009) outlined Luce’s (2002, 2004) proposed psychophysical theory and tested, for brightness, behavioral properties that, separately, gave rise to two psychophysical functions, Ψ⊕ and Ψ◦p . The function Ψ⊕ maps pairs of physical intensities onto the positive real numbers and represents subjective summation, and the function Ψ◦p represents a form of ratio production. This article ...
Using data collected with the CLEO detector operating at the CESR e+e− collider at √ s = 3.974.26GeV, we investigate 15 charmonium decay modes of the ψ(4040), ψ(4160), and Y (4260) resonances. We confirm, at 11σ significance, the BaBar Y (4260)→ π+π−J/ψ discovery, make the first observation of Y (4260) → π0π0J/ψ (5.1σ), and find the first evidence for Y (4260) → K+K−J/ψ (3.7σ). We measure e+e− ...
It is is explained why physical consistency requires substituting linear observables by nonlinear ones for quantum systems with nonlinear time evolution of pure states. The exact meaning and the concrete physical interpretation are described in full detail for a special case of the nonlinear Doebner-Goldin equation. 1 Schrödinger dynamics By Schrödinger dynamics we mean a strongly continuous tw...
The electromagnetic decay contributions to J/ψ(ψ′) → V P , where V and P stand for vector and pseudoscalar meson, respectively, are investigated in a vector meson dominance (VMD) model. We show that J/ψ(ψ′) → γ∗ → V P can be constrained well with the available experimental information. We find that this process has significant contributions in ψ′ → V P and may play a key role in understanding t...
We present a microscopic calculation of the breakup cross sections of J/ψ and ψ on pions and nucleons as a function of the kinetic energy. These cross sections are used for the investigation of the J/ψ to continuum and ψ/J/ψ ratios in ultrarelativistic heavy ion collisions. The contribution of produced comoving pions to the ψ/J/ψ signal is calculated. While this model can account for the data, ...
T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, S. Z. Li, R. Poling, A. W. Scott, A. Smith, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, J. Ernst, H. Severini, D. M. Asner, S. A. Dytman, W. Love, S. Mehrabyan, J. A. Mueller, V. Savinov, Z. Li, A. Lopez, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi,...
Thermodynamic data are reported revealing that pseudouridine (Ψ) can stabilize RNA duplexes when replacing U and forming Ψ-A, Ψ-G, Ψ-U and Ψ-C pairs. Stabilization is dependent on type of base pair, position of Ψ within the RNA duplex, and type and orientation of adjacent Watson-Crick pairs. NMR spectra demonstrate that for internal Ψ-A, Ψ-G and Ψ-U pairs, the N3 imino proton is hydrogen bonded...
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