Studies of the Response of the Prototype CMS Hadron Calorimeter, Including Magnetic Field Effects, to Pion, Electron, and Muon Beams

We report on the response of a prototype CMS hadron calorimeter module to charged particle beams of pions, muons, and electrons with momenta up to 375 GeV/c. The data were taken at the H2 and H4 beamlines at CERN in 1995 and 1996. The prototype sampling calorimeter used copper absorber plates and scintillator tiles with wavelength shifting fibers for readout. The effects of a magnetic field of up to 3 Tesla on the response of the calorimeter to muons, electrons, and pions are presented, and the effects of an upstream lead tungstate crystal electromagnetic calorimeter on the linearity and energy resolution of the combined calorimetric system to hadrons are evaluated. The results are compared with Monte Carlo simulations and are used to optimize the choice of total absorber depth, sampling frequency, and longitudinal readout segmentation.Comment: 89 pages, 41 figures, to be published in NIM, corresponding author: P de Barbaro, [email protected]

Search for the standard model Higgs boson in the H to ZZ to 2l 2nu channel in pp collisions at sqrt(s) = 7 TeV

A search for the standard model Higgs boson in the H to ZZ to 2l 2nu decay channel, where l = e or mu, in pp collisions at a center-of-mass energy of 7 TeV is presented. The data were collected at the LHC, with the CMS detector, and correspond to an integrated luminosity of 4.6 inverse femtobarns. No significant excess is observed above the background expectation, and upper limits are set on the Higgs boson production cross section. The presence of the standard model Higgs boson with a mass in the 270-440 GeV range is excluded at 95% confidence level.Comment: Submitted to JHE

Combined search for the quarks of a sequential fourth generation

Results are presented from a search for a fourth generation of quarks produced singly or in pairs in a data set corresponding to an integrated luminosity of 5 inverse femtobarns recorded by the CMS experiment at the LHC in 2011. A novel strategy has been developed for a combined search for quarks of the up and down type in decay channels with at least one isolated muon or electron. Limits on the mass of the fourth-generation quarks and the relevant Cabibbo-Kobayashi-Maskawa matrix elements are derived in the context of a simple extension of the standard model with a sequential fourth generation of fermions. The existence of mass-degenerate fourth-generation quarks with masses below 685 GeV is excluded at 95% confidence level for minimal off-diagonal mixing between the third- and the fourth-generation quarks. With a mass difference of 25 GeV between the quark masses, the obtained limit on the masses of the fourth-generation quarks shifts by about +/- 20 GeV. These results significantly reduce the allowed parameter space for a fourth generation of fermions.Comment: Replaced with published version. Added journal reference and DO

Performance of the CMS Cathode Strip Chambers with Cosmic Rays

The Cathode Strip Chambers (CSCs) constitute the primary muon tracking device in the CMS endcaps. Their performance has been evaluated using data taken during a cosmic ray run in fall 2008. Measured noise levels are low, with the number of noisy channels well below 1%. Coordinate resolution was measured for all types of chambers, and fall in the range 47 microns to 243 microns. The efficiencies for local charged track triggers, for hit and for segments reconstruction were measured, and are above 99%. The timing resolution per layer is approximately 5 ns

Performance and Operation of the CMS Electromagnetic Calorimeter

The operation and general performance of the CMS electromagnetic calorimeter using cosmic-ray muons are described. These muons were recorded after the closure of the CMS detector in late 2008. The calorimeter is made of lead tungstate crystals and the overall status of the 75848 channels corresponding to the barrel and endcap detectors is reported. The stability of crucial operational parameters, such as high voltage, temperature and electronic noise, is summarised and the performance of the light monitoring system is presented

Особенности этнокультурной идентификации украинцев в США

Стаття присвячена вивченню особливостей української еміґрації до США. Емпіричне дослідження базується на авторській теоретичній основі вивчення ідентифікаційних процесів в середовищі міжнародних мігрантів. У статті проаналізовано етнічні ідентичності та відповідні практики українців у США, які відтворюються через дотримання традицій та розвиток відповідної інфраструктури. Встановлено, зокрема, що етнічні ідентичності та відповідні практики українців у США мають як поверхневу, так і глибоку форму, оскільки втілюються в певній спільній діяльності. Виявлено особливості формування української складової культурної ідентичності українських імміґрантів у США. Крім того, встановлено подібності та відмінності етнічних та культурних ідентичностей і практик українських імміґрантів, що належать до «старої» (повоєнної) та «нової» (часів незалежності України) міґраційних хвиль. Зокрема, представники «старої» хвилі цю складову та відповідні практики будують на основі української національної та української етнічної приналежності, представники ж «нової» хвилі — на етнічній українській приналежності та на культурних практиках, пов’язаних із радянським минулим України та відтворенням елементів інших культур, що поширені в Україні часів незалежності. Крім того, виявлено, що через більшу поширеність участі в офіційних українських організаціях етнокультурні практики представників «старої» хвилі є більш інституціоналізованими, ніж у представників «нової» хвилі.The article is devoted to the issues of theoretical and empirical study of Ukrainian migration to the USA in its sociocultural dimension. It is aimed to the investigation of such ideas as migrants’ identities and corresponding practices. Namely, ethnic and cultural identities of the Ukrainians in the USA have been studied in the work. The authors’ theoretical concept is a basis for empirical survey on Ukrainian migration to the USA. The survey was conducted in 2015. 40 semi-structured interviews with Ukrainians who had experienced living in USA were collected during the research. The survey was aimed at the analysis of ethnic identities and practices, studying the cultural self-determination of the Ukrainians in the USA; detection of differences in ethnocultural identities and practices of «old» and «new» Ukrainian immigration waves. The benefits of this study are the separation of ethnic and cultural identities and practices as well as their isolation from national ones. Moreover, main points of the article have been described both in the context of «old» (postwar) and «new» (independence period) Ukrainian immigration.The main outcomes of the research are as follows. Respondents’ Ukrainian ethnic identity has superficial form (own naming) and is implemented in corresponding practices and common activities. This means that ethnic identities of the Ukrainians in the USA also have a deep form. Ethnic practices are fulfilled through maintainance of the ethnic traditions and ethnic infrastructure development. Ukrainian organizations are one of the most important types of the ethnic infrastructure objects. Though the respondents of «old» wave prefer the membership in traditional official organizations, the respondents of «new» wave prefer new, network-structured informal organization/communities. These types of Ukrainian organizations are differently significant in ethnic and socially-political dimensions. The difference in shaping of cultural identity and practices of «old» and «new» immigrants from Ukraine has also been shown in the study. Ukrainian component of «old» immigrants’ cultural identity and corresponding practices is based mainly on the Ukrainian feeling of the ethnonational belonging. At the same time, Ukrainian component of «new» immigrants’ cultural identity and corresponding practices are influenced by the Ukrainian ethnicity, soviet period of Ukrainian history and some outlandish cultural practices widespread in independent Ukraine. Summarising, the survey has shown that the ethnic identity and practices of «old» wave of Ukrainian immigrants in the USA is similar to the ones of «new» wave immigrants, and the Ukrainian conponent of cultural identities differs greatly in the studied waves of Ukrainian immigrants in the USA.Статья посвящена исследованию особенностей украинской эмиграции в США. Эмпирическое исследование основано на авторской теоретической модели исследования идентификационных процессов среди международных мигрантов. В статье проанализировано этнические идентичности и соответствующие практики украинцев в США, которые воспроизводятся через поддержание этнических традиций и развитие этнической инфраструктуры. Установлено, в частности, что этнические идентичности и соответствующие практики украинцев в США имеют как поверхностную, так и глубокую форму, поскольку воплощаются в определенной совместной деятельности. Исследуются особенности формирования украинской составляющей культурной идентичности украинских иммигрантов в США. Кроме того, установлены отличия и сходства в этнических и культурных идентичностей и практик украинских иммигрантов, которые относятся к «старой» (послевоенной) и «новой» (времен независимости) миграционным волнам. В частности, представители «старой» волны эту составляющую и соответствующие практики строят на основе украинской национальной и украинской этнической принадлежности, представители же «новой» волны — на этнической украинской принадлежности и на культурных практиках, связанных с советским прошлым Украины и воспроизведением элементов других культур, которые распространены в Украине времен независимости. Кроме того, выявлено, что из-за большей распространенности участия в официальных украинских организациях этнокультурные практики представителей «старой» волны более институционализированы, чем у представителей «новой» волны

ПОРЯДОК ФОРМУВАННЯ ІНФОРМАЦІЙНИХ ПОШУКОВИХ СИСТЕМ У СИСТЕМІ МВС

Recently, in Ukraine there is more intensive implementation of modern information technologies in the life of the state, particularly in the activities of internal affairs agencies of Ukraine in general and the National Police of Ukraine in particular. Considering the fact that modern technologies constantly progressing and this issue requires constant learning and improvement, the author of this scientific article has highlighted the relevant issues of informatization of police departments. In the light of recent tendencies the reform and modernization in the field of law enforcement activities the author emphasizes the importance of the issue of informatization of the units carrying out operative and search activities. The study also examined the latest relevant legislation, which was passed as a result of reforms in the country. The basic information subsystems of integrated information and search system of internal affairs agencies of Ukraine, which are provided with the information by criminal investigation units. Based on the conducted analysis the author has highlighted the main problems of information provision of operative units.Розглянуто актуальні питання інформатизації підрозділів ОВС. В умовах останніх тенденцій реформування та модернізації у сфері правоохоронної діяльності наголошено на значущості питання інформатизації підрозділів, що здійснюють оперативно-розшукову діяльність. Проаналізовано відповідне новітнє законодавство, яке було ухвалено в результаті проведених у державі реформ. Охарактеризовано основні інформаційні підсистеми Інтегрованої інформаційно-пошукової системи органів внутрішніх справ України, до яких підрозділи карного розшуку надають та вносять інформацію. На основі проведеного аналізу визначено основні проблеми інформаційного забезпечення оперативних підрозділів

Measurement of the sum ofWW and WZ production with W+dijet events in pp collisions at √ s = 7 TeV

A measurement of the inclusive WW+WZ diboson production cross section in proton–proton collisions is reported, based on events containing a leptonically decaying √W boson and exactly two jets. The data sample, collected at s = 7 TeV with the CMS detector at the LHC, corresponds to an integrated luminosity of 5.0 fb−1. The measured value of the sum of the inclusive WW and WZ cross sections is σ(pp → WW + WZ) = 68.9 ± 8.7 (stat.) ± 9.7 (syst.) ± 1.5 (lum.) pb, consistent with the standard model prediction of 65.6±2.2 pb. This is the first measurement of WW+WZ production in pp collisions using this signature. No evidence for anomalous triple gauge couplings is found and upper limits are set on their magnitudes

Search for Pair Production of Third-Generation Leptoquarks and Top Squarks in pp Collisions at √s=7 TeV

Results are presented from a search for the pair production of third-generation scalar and vector leptoquarks, as well as for top squarks in R-parity-violating supersymmetric models. In either scenario, the new, heavy particle decays into a τ lepton and a b quark. The search is based on a data sample of pp collisions at √s=7  TeV, which is collected by the CMS detector at the LHC and corresponds to an integrated luminosity of 4.8  fb[superscript -1]. The number of observed events is found to be in agreement with the standard model prediction, and exclusion limits on mass parameters are obtained at the 95% confidence level. Vector leptoquarks with masses below 760 GeV are excluded and, if the branching fraction of the scalar leptoquark decay to a τ lepton and a b quark is assumed to be unity, third-generation scalar leptoquarks with masses below 525 GeV are ruled out. Top squarks with masses below 453 GeV are excluded for a typical benchmark scenario, and limits on the coupling between the top squark, τ lepton, and b quark, λ333′ are obtained. These results are the most stringent for these scenarios to date