The simulation software for the ATLAS Experiment at the Large Hadron Collider is being used for largescale production of events on the LHC Computing Grid. This simulation requires many components, from the generators that simulate particle collisions, through packages simulating the response of the various detectors and triggers. All of these components come together under the AT-LAS simulation infrastructure. In this paper, that infrastructure is discussed, including that supporting the detector description, interfacing the event generation, and combining the GEANT4 simulation of the response of the individual detectors. Also described are the tools allowing the software validation, performance testing, and the validation of the simulated output against known physics processes.

The review of experimental results obtained with SND detector at VEPP-2M e + e − collider in the energy region √ s = 0.36 -1.38 GeV is given. The presented results include the following items: studies of the light vector mesons radiative decays, OZI-rule and G-parity suppressed φ-meson rare decays, φ-meson parameters measurements, studies of e + e − → π + π − π 0 process dynamics, η and KS mesons rare decays, η and φ mesons conversion decays, and study of the e + e − annihilation into hadrons.The Spherical Neutral Detector (SND) operated since 1995 up to 2000 at VEPP-2M [1] e + e − collider in the energy range from 0.36 to 1.38 GeV. SND was described in detail in Ref. [2]. During six experimental years SND had collected data with integrated luminosity about 30 pb −1 . Radiative decays of the φ, ω, ρ mesonsElectric dipole transitions of the φ meson. Till recently φ meson electric dipole transitions were not observed. A search for such decays was first performed with ND detector at VEPP-2M and the upper limits of about 10 −3 were obtained [3]. About the same time the theoretical proposal of the φ → f 0 γ,

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Using 116.1 fb(-1) of data collected by the BABAR detector, we present an analysis of xi(c)(0) production in B decays and from the cc continuum, with the xi(c)(0) decaying into omega- K+ and xi- pi+ final states. We measure the ratio of branching fractions B(xi(c)(0) --> omega- K+)/B(xi(c)(0) --> xi- pi+) spectrum is measured on and 40 MeV below the upsilon(4S) resonance. From these spectra the branching fraction product B(B --> xi(c)(0)X) x B(xi(c)(0) --> xi- pi+) is measured to be (2.11 +/- 0.19 +/- 0.25) x 10(-4), and the cross-section product sigma(e+ e- --> xi(c)(0)X) x B(xi(c)(0) --> xi- pi+) from the continuum is measured to be (388 +/- 39 +/- 41) fb at a center-of-mass energy of 10.58 GeV.