نتایج جستجو برای: ψ
تعداد نتایج: 8567 فیلتر نتایج به سال:
for given non-zero polynomials G,Ψ, S. A polynomial trio (σ, η, ω) satisfying (1) may be referred to as a minimal solution of the key equation if σ is monic; deg(σΨ) > deg(ω); and deg(σ) is minimum. Let A(G,Ψ, S) denote the set of all minimal solutions of key equation (1). The problem of finding, from a known element of A(G,Ψ, S), one element each of: (a) A(G,Ψ/(x− β1), S); (b) A(G, (x− β2)Ψ, S...
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A search for J/ψ radiative decay to weakly interacting neutral final states was performed using the CLEO-c detector at CESR. J/ψ events were selected by observing the hadronic decay ψ(2S) → π+π−J/ψ. A total of 3.7 × 106 J/ψ events was used to study the decay J/ψ → γ + X, where X is a narrow state that is invisible to the detector. No significant signal was observed and upper limits on the branc...
We calculate the direct production rate of J/ψ in top quark decays. The color-octet J/ψ production via t → WbJ/ψ is shown to have a large branching ratio of order 1.5× 10−4, which is over an order of magnitude higher than that of the color-singlet J/ψ production via t → WbJ/ψ g g or t → Wb χcJ g followed by χcJ → J/ψ γ. This result can be used as a powerful tool to test the importance of the co...
The non-DD̄ decays of the ψ′′ = ψ(3770) resonance are discussed and possibilities for further measurements are noted. These decays can shed light on S–D mixing, the “missing” ψ′ = ψ(3686) decays, a possible discrepancy between the total and DD̄ cross sections at the ψ′′, and rescattering effects contributing to enhanced b → s penguin amplitudes in B meson decays. The importance is stressed of mea...
Any charged particle moving faster than light through a medium emits Cherenkov radiation. We show that charged particles moving faster than light through the vacuum emit Cherenkov radiation. How can a particle move faster than light? The weak speed of a charged particle can exceed the speed of light. By definition, the weak velocity v w is Ψ f in |v|Ψ in /Ψ f in |Ψ in , where v is the velocity ...
State reconstruction for quantum spins is reviewed. Emphasis is on nontomographic approaches which are based on measurements performed with a Stern-Gerlach apparatus. Two consequences of successfully implemented state reconstruction are pointed out. First, it allows one to determine experimentally the expectation value of an arbitrary operator Ô without a device measuring it. Second, state reco...
In this paper, we introduce the notion of generalized (α, φ, ψ)- Geraghty contractive type mappings in setup Sb-metric spaces and α-orbital admissible with respect to φ. Furthermore, fixed-point theorems for such complete are proven without assuming subadditivity ψ. Some examples provided supporting our main results. Also, gave an application integral equations as well Homotopy.
A sample of 3.79 million ψ(2S) events is used to study the decays of charmonium to axialvector plus pseudoscalar mesons. The branching fraction for the decay ψ(2S) → b±1 (1235)π agrees with expectations based on scaling the corresponding J/ψ branching fraction. Flavor-SU(3)-violating K1(1270)K1(1400) asymmetries with opposite character for ψ(2S) and J/ψ decays are observed. This contrasting beh...
respectively, where F : [0,T]×D→ (Rn) is amultivaluedmap,D = {ψ : [−r,0]→Rn; ψ is continuous everywhere except for a finite number of points t̃ at which ψ(t̃−) and ψ(t̃+) exist with ψ(t̃−)= ψ(t̃)}, φ ∈D, p : [0,T]→R+ is continuous, η ∈Rn, (Rn) is the family of all nonempty subsets of Rn, 0 < r < ∞, 0 = t0 < t1 < ··· < tm < tm+1 = T , Ik, Jk : Rn → Rnk = 1, . . . ,m are continuous functions. y(t− k )...
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