Results obtained in pi(-) Be interactions at 27, 36.6 and 41 GeV/c are presented. Decay f(1)(1285) -> pi(+)pi(-)pi(0) is observed; the dominant mechanism of the isospin symmetry violation in this decay is the a(0)(980) - f(0)(980) mixing. The intensity of this mixing is measured. An upper limit on possible f(1)(1285) - a(1)(1260) mixing is obtained. Preliminary results of a study of (omega phi) system are shown. Plans for coming upgrade of the detector are presented.

ATLAS is one of the largest collaborations ever undertaken in the physical sciences. This paper explains how the software infrastructure is organized to manage collaborative code development by around 300 developers with varying degrees of expertise and situated in 30 different countries. ATLAS offline software currently consists of about 2 million source lines of code contained in 6800 C ++ classes, organized in more than 1000 packages. We will describe how releases of the offline ATLAS software are built, validated and subsequently deployed to remote sites. Several software management tools have been used, the majority of which are not ATLAS specific; we will show how they have been integrated. (c) 2007 Elsevier B.V. All rights reserved.

The isospin-violating decay f 1 (1285) → π + π - π 0 has been studied at the VES facility. This study is based on the statistics acquired in π - Be interactions at 27, 36.6 and 41 GeV/ c in the diffractive reaction π - N → ( f 1 π - ) N . The f 1 (1285) → π + π - π 0 decay is observed. The preliminary ratio of decay probabilities BR ( f 1 (1285) → π + π - π 0 ) to BR ( f 1 (1285) → ηπ + π - ) . BR (η → γγ) is ∼ 2% .

The Dalitz plot of the η′→ηπ+π− decay is studied using the data collected with the VES spectrometer in two different exclusive reactions, π−p→η′n (charge-exchange) and π−N→η′π−N (diffractive-like production). The η mesons from η′ decays were detected in the η→γγ mode. The coefficients for the matrix element squared decomposition are measured on the largest statistics of η′ decays reported so far; there are ∼13.6×103 and ∼6.5×103 decays after background subtraction in charge-exchange and diffractive-like production, respectively.

Measurements of Dalitz plot parameters for η′ → ηπ+π− decay are presented. The data sample of ∼15000 events originates from charge‐exchange reaction π−p → η′N* at beam momentum of 28 GeV/c. Comparison with results from diffractive‐like reaction, π−A → η′π−A* and with theoretical expectations is given. Also a limit of Br(η′ → (π+π−π0)) is estimated.

The concept of a very long baseline neutrino experiment with quasi monochromatic neutrino beam and very large area underground detector is discussed. The detector could be placed in the existing 20 km tunnel at IHEP, Protvino. The High Intensity Proton Accelerators (HIPA) which are planned to be built in Japan (JAERI-KEK, baseline of 7000 km) and Germany (GSI, baseline of 2000 km) as well as the Main Injector at Fermilab (7600 km) are considered as possible sources of neutrino beams. The oscillations are analysed in the three-neutrino scheme taking into account terrestrial matter effects. In the proposed experiment it is feasible to observe the oscillation pattern as an unique proof of the existence of neutrino oscillations. Precise measurements of disappearance oscillation parameters of the muon neutrinos and antineutrinos can be done within a reasonable time.