Determination of f(s)/f(d) for 7 TeV pp collisions and measurement of the B0→D-K+ branching fraction.

The relative abundance of the three decay modes B(0)→D(-)K(+), B(0)→D(-)π(+), and B(s)(0)→D(s)(-)π(+) produced in 7 TeV pp collisions at the LHC is determined from data corresponding to an integrated luminosity of 35 pb(-1). The branching fraction of B(0)→D(-)K(+) is found to be B(B(0)→D(-)K(+)) = (2.01 ± 0.

Measurement of dijet angular distributions and search for quark compositeness in pp collisions at √s = 7 TeV.

Dijet angular distributions are measured over a wide range of dijet invariant masses in pp collisions at √s = 7 TeV, at the CERN LHC. The event sample, recorded with the CMS detector, corresponds to an integrated luminosity of 36 pb⁻¹. The data are found to be in good agreement with the predictions of perturbative QCD, and yield no evidence of quark compositeness.

Search for pair production of second-generation scalar leptoquarks in pp collisions at √s = 7 TeV.

A search for pair production of second-generation scalar leptoquarks in the final state with two muons and two jets is performed using proton-proton collision data at √s = 7 TeV collected by the CMS detector at the LHC. The data sample used corresponds to an integrated luminosity of 34 pb⁻¹. The number of observed events is in good agreement with the predictions from the standard model processes.

Search for pair production of first-generation scalar leptoquarks in pp collisions at √s = 7 TeV.

A search for pair production of first-generation scalar leptoquarks is performed in the final state containing two electrons and two jets using proton-proton collision data at √s = 7 TeV. The data sample used corresponds to an integrated luminosity of 33 pb⁻¹ collected with the CMS detector at the CERN LHC. The number of observed events is in good agreement with the predictions for the standard model background processes, and an upper limit is set on the leptoquark pair production cross section times β² as a function of the leptoquark mass, where β is the branching fraction of the leptoquark decay to an electron and a quark.

Dijet azimuthal decorrelations in pp collisions at √s=7 TeV.

Measurements of dijet azimuthal decorrelations in pp collisions at √s=7 TeV using the CMS detector at the CERN LHC are presented. The analysis is based on an inclusive dijet event sample corresponding to an integrated luminosity of 2.9 pb⁻¹.

Measurement of the B(+) production cross section in pp collisions at sqrt[s]=7 TeV.

Measurements of the total and differential cross sections dσ/dp(T)(B) and dσ/dy(B) for B(+) mesons produced in pp collisions at sqrt[s]=7  TeV are presented. The data correspond to an integrated luminosity of 5.8  pb(-1) collected by the CMS experiment operating at the LHC.

Measurement of the isolated prompt photon production cross section in pp collisions at √s=7 TeV.

The differential cross section for the inclusive production of isolated prompt photons has been measured as a function of the photon transverse energy E(T)(γ) in pp collisions at √s=7  TeV using data recorded by the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 2.9  pb(-1).

[Decrease in sucrose solution consumption by CBA/Lac male mice under chronic social stress].

The influence of repeated experience of social defeats in daily agonistic interactions on voluntary consumption of 1% sucrose solution supplemented with vanillin (0.2%) was studied in male mice of CBA/Lac strain with genetic predisposition to catalepsy as compared to depression-predisposed C57BL/6J mice. Intact mice of both strains prefered sucrose solution to water under conditions of two-bottle free choice.

Search for stopped Gluinos in pp collisions at square root s=7 TeV.

The results of the first search for long-lived gluinos produced in 7 TeV pp collisions at the CERN Large Hadron Collider are presented. The search looks for evidence of long-lived particles that stop in the CMS detector and decay in the quiescent periods between beam crossings. In a dataset with a peak instantaneous luminosity of 1×10(32) cm-2 s-1, an integrated luminosity of 10 pb-1, and a search interval corresponding to 62 hours of LHC operation, no significant excess above background was observed.

Search for quark compositeness with the dijet centrality ratio in pp collisions at √s=7 TeV.

A search for quark compositeness in the form of quark contact interactions, based on hadronic jet pairs (dijets) produced in proton-proton collisions at √s=7 TeV, is described. The data sample of the study corresponds to an integrated luminosity of 2.9 pb(-1) collected with the CMS detector at the LHC.

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.

Snca and Bdnf gene expression in the VTA and raphe nuclei of midbrain in chronically victorious and defeated male mice.

Background: Alpha-synuclein (α-Syn) is a small neuronal protein that has been found to be expressed throughout the brain. It has been shown that α-Syn regulates the homeostasis of monoamine neurotransmitters and is involved in various degenerative and affective disorders. There is indication that α-Syn may regulate expression of the brain-derived neurotropic factor (BDNF) which plays an important role in the mood disorders.

Modeling fighting deprivation effect in mouse repeated aggression paradigm.

Male mice with a long positive fighting history develop behavioral psychopathology, which includes abnormal aggression, hostility, hyperactivity, stereotypic reactions and other behavioral phenotypes. We also found that the "winners" (mice that had each won 20 daily encounters in succession) develop an enhanced level of aggression after a no-fight period, compared to their respective levels of aggressive behavior before the fighting deprivation. Natural hedonic stimuli (such as access to females or sweet water), supplied to the winners during this no-fight period, appear to play a minor role in triggering this phenomenon.

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.

[Effect of sodium valproate on aggressive behavior of male mice with various aggression experience].

Sector of Social Behavior Neurogenetics, Institute of Cytology and Genetics, Siberian Branch, Effects of sodium valproate on the aggressive behavior of male mice with 2- and 20-day positive fighting experience have been studied. It is established that valproate administered in a singe dose of 100 mg/kg has no effect on the behavior of male mice with a 2-day experience of aggression. The treatment of mice with 300 mg/kg of valproate significantly decreased the level of aggressive motivation and the percentage of animals demonstrating attacks and threats.

[Effect of positive and negative social experiences on sucrose solution intake by male mice].

Hedonic reactions to various rewards play a key role in various forms of motivated behavior. The influence of repeated experience of social victories or defeats in daily agonistic interactions between male mice on voluntary consumption of 1% sucrose solution supplemented with vanillin (0.2%) was studied.

Molecular implications of repeated aggression: Th, Dat1, Snca and Bdnf gene expression in the VTA of victorious male mice.

Background: It is generally recognized that recurrent aggression can be the result of various psychiatric disorders. The aim of our study was to analyze the mRNA levels, in the ventral tegmental area (VTA) of the midbrain, of the genes that may possibly be associated with aggression consistently shown by male mice in special experimental settings.

Methodology/principal Findings: The genes were Th, Dat1, Snca and Bdnf; the male mice were a group of animals that had each won 20 daily encounters in succession and a group of animals that had the same winning track record followed by a no-fight period for 14 days.

Behavioral effect of terahertz waves in male mice.

We studied the effect of terahertz waves (3.6 THz, 81.5 micro, 15 mW) on the behavior of mice.

[Influence of experimental context on the development of anhedonia in male mice exposed to chronic social stress].

Consumption of 1% sucrose solution supplemented with 0.2% vanillin was studied in two experimental contexts in male mice living under chronic social stress induced by daily experience of defeats in agonistic interactions and leading to development of depression. In the first experiment, vanillin sucrose solution was made available as an option along with water during 10 days for mice living in group home cages.

An experimental approach for the study of psychotropic drug effects under simulated clinical conditions.

The sensory contact model can induce various different psychopathological states in male mice (anxious depression, catalepsy, social withdrawal, pathological aggression, cognition disturbances, anhedonia, alcoholism etc.). Additionally, this model facilitates the screening of drugs for therapeutic properties, preventive properties and efficiency under simulated clinical conditions.

Apparatus to study crystal channeling and volume reflection phenomena at the SPS H8 beamline.

A high performance apparatus has been designed and built by the H8-RD22 collaboration for the study of channeling and volume reflection phenomena in the interaction of 400 GeV/c protons with bent silicon crystals, during the 2006 data taking in the external beamline H8 of the CERN SPS. High-quality silicon short crystals were bent by either anticlastic or quasimosaic effects. Alignment with the highly parallel (8 murad divergence) proton beam was guaranteed through a submicroradian goniometric system equipped with both rotational and translational stages.

[Development of anhedonia under negative experience of social confrontations in male mice].

Possible development of anhedonia in male mice under chronic stress produced by social confrontations was investigated. Cheese, instead of traditional sucrose solution, was used as a positive reinforcement. It has been shown that the controls, the winners with repeated experience of aggression accompanied by victories and the losers with repeated experience of social defeats, irrespective of their social status, preferred to eat cheese, but not pellets, under the free choice conditions--80% of total food.

[Choice of "control" in experimental researches of animal social interactions in mice].

The purpose of the present experiment was to clarify the individuals as an appropriate "control" in research of social interactions in animals. As it has been established for the C57BL/6J mouse strain, the best control animals are individually housed for 5 days males in contrast to males placed with females or with other males in groups of 3-10 mice. Such male mice were less anxious and had high exploratory and motor activities in the elevated plus-maze, open-field, forced swimming and exploratory-activity tests.

[Impaired social recognition in male mice with repeated experience of aggression].

Social recognition is crucial for many aspects of animal behavior in stabilized population. Preliminary data proposed impairment of social recognition in male mice with long experience of aggression. To check this hypothesis, experiments with male mice with different aggressive experience (during 2 and 20 days) were performed.