6 research outputs found
Study of KS KL Coupled Decays and KL -Be Interactions with the CMD-2 Detector at VEPP-2M Collider
The integrated luminosity about 4000 inverse nanobarn of around phi meson
mass ( 5 millions of phi mesons) has been collected with the CMD-2 detector at
the VEPP-2M collider. A latest analysis of the KS KL coupled decays based on 30
% of available data is presented in this paper.
The KS KL pairs from phi meson decays were reconstructed in the drift chamber
when both kaons decayed into two charged particles. From a sample of 1423
coupled decays a selection of candidates to the CP violating KL into pi+ pi-
decay was performed. CP violating decays were not identified because of the
domination of events with a KL regenerating at the Be beam pipe into KS and a
background from KL semileptonic decays.
The regeneration cross section of 110 MeV/c KL mesons was found to be 53 +-
17 mb in agreement with theoretical expectations. The angular distribution of
KS mesons after regeneration and the total cross section of KL for Be have been
measured.Comment: 14 pages, 8 figure
Measurement of the meson parameters with CMD-2 detector at VEPP-2M Collider
About 300 000 events in the center of mass
energy range from 984 to 1040 MeV were used for the measurement of the
meson parameters. The following results have been obtained: MeV.Comment: 13 pages, 5 figures, 5 table
Inter-regional Population Migration in Russia: Using an Origin-to-Destination Matrix
This study examines regional economic conditions and their effects on inter-regional population redistribution patterns in Russia. After reviewing striking changes in population flows before and after the collapse of the former Soviet Union, an application of the gravity model to population migration in Russia in 2003 is presented using a newly obtained inter-regional in- and out-migration flow matrix supplied by Rosstat (formerly Goskomstat). Gross migration patterns since the year 2000, when large transformational population flows ceased, have not been investigated so far in the existing literature. The analysis conducted focuses on geographical factors, which have been basically omitted in existing literature on migration patterns in post-Soviet Russia, and the attractiveness of Moscow and surrounding regions and resource-mining areas is clearly presented.