نتایج جستجو برای: ν
تعداد نتایج: 7851 فیلتر نتایج به سال:
We report measurements of oscillation parameters from ν(μ) and ν(μ) disappearance using beam and atmospheric data from MINOS. The data comprise exposures of 10.71×10(20) protons on target in the ν(μ)-dominated beam, 3.36×10(20) protons on target in the ν(μ)-enhanced beam, and 37.88 kton yr of atmospheric neutrinos. Assuming identical ν and ν oscillation parameters, we measure |Δm2| = (2.41(-0.1...
1 Distance en variation 1 2 Collectionneur de coupons 3 3 Une marche aléatoire sur le groupe symétrique Σr 7 1 Distance en variation Dans toute cette section, E est un ensemble au plus dénombrable. L'ensemble des lois sur E est un espace métrique pour la distance en variation (on dit aussi variation totale) d V (µ, ν) = sup A⊂E |µ(A) − ν(A)|. On a 0 ≤ d V (µ, ν) ≤ 1 et d V (µ, ν) = 1 si µ et ν ...
Flavor changing neutral current processes in B and K decays in the supergravity model 1 * Abstract Flavor changing neutral current processes such as b → s γ, b → s l + l − , b → s ν ν, ǫ K , ∆m B , K + → π + ν ν and K L → π 0 ν ν are calculated in the supersymmetric standard model based on supergravity. We consider two assumptions for the soft supersym-metry breaking terms. In the minimal case ...
In the context of neutrino scenarios characterized by four (three active plus one sterile) neutrino species and by mass spectra with two separated doublets, we analyze solutions to the atmospheric neutrino anomaly which smoothly interpolate between ν µ → ν τ and ν µ → ν s oscillations. We show that, although the Super-Kamiokande data disfavor the pure ν µ → ν s channel, they do not exclude its ...
The recent massive measurements of pulsar frequency second derivatives have shown that they are 100-1000 times larger than expected for standard pulsar slowdown low. Moreover, the second derivatives as well as braking indices are even negative for about half of pulsars. We explain these paradoxical results on the basis of the statistical analysis of the rotational parameters ν, ˙ ν and¨ν of the...
Let jν,k denote the k-th positive zero of the Bessel function Jν(x). In this paper, we prove that for ν > 0 and k = 1, 2, 3, . . . , ν − ak 21/3 ν < jν,k < ν − ak 21/3 ν + 3 20 ak 21/3 ν1/3 . These bounds coincide with the first few terms of the well-known asymptotic expansion jν,k ∼ ν − ak 21/3 ν + 3 20 ak 21/3 ν1/3 + · · · as ν →∞, k being fixed, where ak is the k-th negative zero of the Airy...
It is shown that recent results from the Super-Kamiokande detector constrain the tau neutrino diagonal magnetic moment to µ ντ < 1.3 × 10 −7 µ B for the case of ν µ → ν τ interpretation of the atmospheric neutrino anomaly. It is pointed out that the large magnetic moment of the tau neutrino could affect further understanding of the origin of the anomaly. Recent results from the Super-Kamiokande...
This Article contains typographical errors where the flux unit 'ν e /100 cm 2 /s' was incorrectly given as 'ν e / cm 2 /s' In the legend of Figs 1, 2 and 5, " Flux units are ν e /cm 2 /s at the Earth's surface " should read: " Flux units are ν e /100 cm 2 /s at the Earth's surface " In the legend of Fig. 3, " AGM2015 ν e flux (ν e /cm 2 /s/keV) " should read: " AGM2015 ν e flux (ν e /100 cm 2 /...
The effect of the overlap of γγ → hadrons to Hνν̄ events has been studied for the case of the Tesla e+e− linear collider at √ s = 350 GeV. It was found that, due to the significant bunch length and the track extrapolation accuracy provided by the Vertex Tracker, the γγ background to physics events can be substantially reduced, with moderate loss in reconstruction efficiency, by a combination of ...
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