ATLAS Sensitivity to the Flavour-Changing Neutral Current Decay t→Zqt \to Zq

The sensitivity of the ATLAS experiment to the top-quark rare decay via flavor-changing neutral currents $t \rightarrow Zq$ ($q$ represents $c$ and $u$ quarks) has been studied at $\sqrt{s}$=14 TeV in two decay modes: 1.The pure leptonic decay of gauge bosons: $t\bar{t} \rightarrow ZqWb \rightarrow l^{+} l^{-} j l^{\pm} \nu b$ , (l=e, $\mu$). 2.The leptonic decay of Z bosons and hadronic decay of W bosons: $t\bar{t} \rightarrow ZqWb \rightarrow l^{+} l^{-} jjjb$ , (l=e, $\mu$). The dominant backgrounds $Z+jets$, $WZ$ and $t\bar{t}$ have been analysed. The signal and backgrounds were generated via PYTHIA 5.7, and simulated and analysed using ATLFAST 2.14. A branching ratio for $t \rightarrow Zq$ as low as 2.0x10$^{-4}$ for the leptonic mode and 5.9x10$^{-4}$ for hadronic mode could be discovered at the 5$\sigma$ level with an integrated luminosity of 100 fb$^{-1}$.Comment: 15 pages, 8 figure

Development of Structure of Expert System on the Basis of Solution of Conflicts Among Production Rules

Article considers the structure of expert system for effective management of normal daily regimes of Georgian power system. In contrast to existing structure, this structure includes the block of solution of conflicts among production rules. This block with blocks of logical output and calculation forms one big block. Advantage of such method is that solution of conflicts among rules takes place in the process of logical output. Therefore, process of making effective decisions is faster.expert system, power system, technologist, production rules

The Universal Rituals and their Function in Stratis Myrivilis’ Prose

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Grigol Robakidze’s Novel, "Megi - A Georgian Maiden", and the Interpretation of Medea’s Image in Modern Greek Literature

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The Interpretation of the Asia Minor Disaster in "The Story of One Captive" by Stratis Doukas

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Study of ATLAS Sensitivity to FCNC TOP Quark Decay t→Zqt \to Zq

The sensitivity of ATLAS experiment to the top-quark rare decay via flavor- changing neutral currents t \to Zq (q represents c and u quarks) have been studied at \sqrt{s}= 14 TeV in two decay modes: 1. The pure leptonic decay of gauge bosons: t\bar{t} \to ZqWb \to l^{+} l^{-} j l^{+-} nu j_{b} (l=e, mu) 2. The leptonic decay of Z bosons and hadronic decay of W bosons t\bar{t} \to ZqWb \to l^{+} l^{-} jjjj_{b} (l=e, mu) The dominant backgrounds Z-jets, Zw and t\bar{t} has been analysed. The signal and backgrounds were generated via PYTHIA 5.7, simulated and analysed using ATLFAST 2.14. A branching ratio for t \to Zq as low as 1.1x1-^{4} for the leptonic mode and 2.3x10^{4} for hadronic mode could be discovered at the 5\sigma level with an integrated luminosity of 10^{5} pb^{-1}

HYDROCHEMICAL EXAMINATION OF MUASHI AND LENTEKHI MINERAL WATER OF LENTEKHI DISTRICT

Our object of study was the mineral water of Lentekhi, a small town in the village of Muashi, Lentekhi district. Hydrochemical analysis of mineral water of Lentekhi, Muashi, was carried out by us for the first time. The content of Ca2+, Mg2+, ions, oxidation, dissolved oxygen, dry residue, and carbon dioxide has been studied by chemical methods