Non-universal gaugino masses: a signal-based analysis for the Large Hadron Collider

We discuss the signals at the Large Hadron Collider (LHC) for scenarios with non-universal gaugino masses in supersymmetric (SUSY) theories. We perform a multichannel analysis, and consider the ratios of event rates in different channels such as $jets + {E}_T/$, $same$ - and $opposite$-$sign dileptons$ $+jets+ {E}_T/$, as well as $single-lepton$ and $trilepton$ final states together with $jets + {E}_T/$ . Low-energy SUSY spectra corresponding to high-scale gaugino non-universality arising from different breaking schemes of SU(5) as well as SO(10) Grand Unified (GUT) SUSY models are considered, with both degenerate low-energy sfermion masses and those arising from a supergravity scenario. We present the numerical predictions over a wide range of the parameter space using the event generator {\tt Pythia}, specifying the event selection criteria and pointing out regions where signals are likely to be beset with backgrounds. Certain broad features emerge from the study, which may be useful in identifying the signatures of different GUT breaking schemes and distinguishing them from a situation with a universal gaugino mass at high scale. The absolute values of the predicted event rates for different scenarios are presented together with the various event ratios, so that these can also be used whenever necessary.Comment: 54 pages, 18 figure

Statistical Mechanics of Horizontal Gene Transfer in Evolutionary Ecology

The biological world, especially its majority microbial component, is strongly interacting and may be dominated by collective effects. In this review, we provide a brief introduction for statistical physicists of the way in which living cells communicate genetically through transferred genes, as well as the ways in which they can reorganize their genomes in response to environmental pressure. We discuss how genome evolution can be thought of as related to the physical phenomenon of annealing, and describe the sense in which genomes can be said to exhibit an analogue of information entropy. As a direct application of these ideas, we analyze the variation with ocean depth of transposons in marine microbial genomes, predicting trends that are consistent with recent observations using metagenomic surveys.Comment: Accepted by Journal of Statistical Physic

Krasnoyarsk Water Reservoir: Monitoring, Biota, Water Quality(review)

This joint work generalizes the results of the Krasnoyarsk water reservoir ecological monitoring held by the faculty, researchers and students of Krasnoyarsk State Universityа (at the moment Siberian Federal University) in 1977-2005. For the first time during the existence of the Krasnoyarsk water reservoir the many years monitoring survey resulted in the analysis of synchronously gained hydrological, hydro-chemical and hydro-biological materials; species compositions of phyto-, zooplankton, zoobenthos, periphyton have been listed; fish physiological biochemical characteristics have been given. Biota structural functioning organization, its productive-destructive dynamics have been shown. Regression equations have been calculated by quantitative link between average-vegetation and august values of the biota components’ density, production and destruction. The complex evaluation of the water quality by its chemical and biological (bio-indication, bio-testing) descriptors has been done for the first time; the following systems modified for the Krasnoyarsk water reservoir have been developed: «system of saprotaxob analysis», «Woodiviss biotic index system», «Unified classifier of water quality assessment by chemical and biological values»; the ecosystem condition has been evaluated by many-year monitoring survey of phyto-, and zooplankton has been done and its ecological modifications have been determined. The mathematical aspects of the biota and water quality analysis and the computer model of the water reservoir ecosystem condition have been described for the first time. The monograph is aimed at professionals and students majoring in hydro-ecology, fish breeding industry, experts in environmental protection and use of water resources