Monte-Carlo Generator Photon Jets for the process e+e- -> gamma gamma

Monte-Carlo generator with photon jets radiation in collinear regions for the process \eegg is described in detail. Radiative corrections in the first order of $\alpha$ are treated exactly. Large leading logarithmic corrections coming from collinear regions are taken into account in all orders of $\alpha$ by applying the Structure Function approach. Theoretical precision of the cross section with radiative corrections is estimated to be 0.2%. This process is considered as an additional tool to measure luminosity in forthcoming experiments with the CMD-3 detector at the $e^+e^-$ collider VEPP-2000.Comment: 6 pages, 5 figure

Recent result from CMD-3 detector

Since December 2010, the CMD-3 detector has collected data at the electron-positron collider VEPP- 2000. The sample of the accumulated data corresponds to about 60 pb−1 of integrated luminosity in the c.m. energy from 0.32 up to 2 GeV. Preliminary results of the analysis of various processes e+e− annihilation to hadrons are presented. It is shown the processes with multihadron events have several intermediate states which must be taken into account to correctly describe the angular and invariant mass distributions as well as cross section dependence versus energy

Synthesis and Characterization of a New Binuclear Copper(II) Complex with an Oxygen Bridge and a B−N Bonded Ligand

[[abstract]]The first ferromagnetic (2J = 1.60 cm-1) binuclear copper(II) complex, [Cu(LBPh3)]2, which contains the self-assembly O-bridged and B−N bonded ligand LBPh3 (=N-(salicylidene)-N‘-(1-BPh3)-imidazol-2-ylmethylene)-1,3-propanediamine), has been prepared. The X-ray structure of [Cu(LBPh3]2 reveals that in an unusual formation of B−N bonding the boron atom bonds to the nitrogen atom of the imidazolate moiety of the ligand. The copper(II) atoms are bridged by self-assembly of chelated oxygen atoms.[[notice]]補正完