In this paper we investigate mixing and transport in correspondence of a meandering jet. The large-scale flow field is a kinematically assigned streamfunction. Two basic mixing mechanisms are considered, first separately and then combined together: deterministic chaotic advection, induced by a time dependence of the flow, and turbulent diffusion, described by means of a stochastic model for par...

A deterministic cellular automaton rule is presented which simulates the Ising model. On each cell in addition to an lsing spin is a space-time parity bit and a variable playing the role of a momentum conjugate to the spin. The procedure permits study of nonequilibrium phenomena, heat flow, mixing, and time correlations. The algorithm can make full use of multispin coding, thus permitting fast ...

We derive a thermal QCD sum rule for the correlation function of two vector currents in the rho-meson channel. It takes into account the non-perturbative contributions of the additional , O(3)-invariant operators, which appear due to the breakdown of Lorentz invariance at finite temperature. The mixing of the new operators has a drastic effect on their coefficients. Also our evaluation of the t...

We review the status of the search for neutrino oscillations in the short baseline regime with experiments at accelerators. The evidence for ν̄μ→ ν̄e from the LSND experiment is compared with the negative results of the KARMEN ν̄μ→ ν̄e search and with the results from NOMAD and NuTeV in the same flavor mixing channel. We describe the upcoming MiniBooNE experiment which should be sufficiently sensit...

The flavor SU(3) group structure of pentaquark baryons which form 1, 8, 10, 10, 27, and 35 multiplets is investigated in quark model. The flavor wave functions of all the pentaquark baryons are constructed in SU(3) quark model and their Yukawa interactions with meson octet are obtained in general and in the special case of the octet-antidecuplet ideal mixing with the OZI rule. The mass sum rule...

By combining the inputs from the neutrinoless double beta decay and the fits of cosmological models of dark matter with solar and atmospheric neutrino data, we obtain constraints on two of the mixing angles of Majorana neutrinos, which become stronger when coupled with the reactor neutrino data. These constraints are strong enough to rule out Majorana neutrinos if the small angle solution of so...

Time-dependent CP asymmetries in B decays from interference of B-B 0 mixing and b → cc̄s, uūd, sqq̄, and direct asymmetries from interference of b → cūs and b → uc̄s are studied, improving errors in the weak phases β and γ to ±1◦ and ±7◦, respectively. Two kinds of tests for New Physics are discussed: 1. Deviations of asymmetries in b → sqq̄ decays from sin 2β sin∆mt. 2. Violation of a sum rule for...

The transition form factors of Ds → f0lν, D → f0lν and Bu → f0lν decays are calculated in 3–point QCD sum rule method, assuming that f0 is a quark–antiquark state with a mixture of strange and light quarks. The branching ratios of these decays are calculated in terms of the mixing angle. e-mail: [email protected] permanent address:Institute of Physics,Baku,Azerbaijan e-mail: [email protected]

An analytical model of composites made of a dielectric base and randomly oriented metal inclusions in the form of nanorods is presented. This model is based on the generalized Maxwell Garnett (MG) mixing rule. In this model, the nanorod particles are modeled as prolate spheroids with a statistically normal distribution of their aspect ratios. It is shown that parameters of the distribution laws...