The impact of the Solar magnetic field on Be activity concentration in aerosols.

In this paper the impact of the Solar magnetic field on Be activity concentration in aerosols was investigated. The changes in the Be activity in aerosols in the period from the second part of 22nd to the second part of 24th Solar cycle were mathematically processed using the Fourier analysis and the 22 years period was pointed out. It corresponds to the most intense period of the Solar polar field strength for the same observed period.

Search for dijet resonances in 7 TeV pp collisions at CMS.

A search for narrow resonances in the dijet mass spectrum is performed using data corresponding to an integrated luminosity of 2.9 pb⁻¹ collected by the CMS experiment at the Large Hadron Collider. Upper limits at the 95% confidence level are presented on the product of the resonance cross section, branching fraction into dijets, and acceptance, separately for decays into quark-quark, quark-gluon, or gluon-gluon pairs.

Transverse-momentum and pseudorapidity distributions of charged hadrons in pp collisions at square root of s = 7 TeV.

Charged-hadron transverse-momentum and pseudorapidity distributions in proton-proton collisions at square root of s = 7  TeV are measured with the inner tracking system of the CMS detector at the LHC. The charged-hadron yield is obtained by counting the number of reconstructed hits, hit pairs, and fully reconstructed charged-particle tracks. The combination of the three methods gives a charged-particle multiplicity per unit of pseudorapidity dN(ch)/dη|(|η|<0.

Digital ratemeter with fast response.

Digital ratemeter that operates according to a self-adjusting algorithm, which at low rates automatically switches from a preset count to the preset time method, is proposed. It combines the good properties of both methods concerning the accuracy of the measured average counting rate and the response time to sudden changes of rate.