A5029134410- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Biochemical effects in animals
- Particle Accelerators and Free-Electron Lasers
- Diet and metabolism studies
- Pharmacological Effects of Natural Compounds
- Quantum Chromodynamics and Particle Interactions
- Neutrino Physics Research
- Eicosanoids and Hypertension Pharmacology
- Neuropeptides and Animal Physiology
- Liver Disease Diagnosis and Treatment
- Adipose Tissue and Metabolism
- Neurological Disorders and Treatments
- Circadian rhythm and melatonin
- Astrophysics and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- Chromatography in Natural Products
- Particle accelerators and beam dynamics
- Pain Management and Opioid Use
- Boron Compounds in Chemistry
- Pharmacological Receptor Mechanisms and Effects
- Astronomical Observations and Instrumentation
- Synthesis and Characterization of Heterocyclic Compounds
Belgorod National Research University
2023-2024
Kursk State Medical University
2012-2019
Ministry of Health of the Russian Federation
2014-2017
Belarusian State University
2007-2010
Results are presented from searches for the standard model Higgs boson in proton-proton collisions at sqrt(s) = 7 and 8 TeV Compact Muon Solenoid experiment LHC, using data samples corresponding to integrated luminosities of up 5.1 inverse femtobarns 5.3 TeV. The search is performed five decay modes: gamma gamma, ZZ, WW, tau tau, b b-bar. An excess events observed above expected background, with a local significance 5.0 deviations, mass near 125 GeV, signalling production new particle. that...
The Compact Muon Solenoid (CMS) detector is described. operates at the Large Hadron Collider (LHC) CERN. It was conceived to study proton-proton (and lead-lead) collisions a centre-of-mass energy of 14 TeV (5.5 nucleon-nucleon) and luminosities up 1034 cm−2 s−1 (1027 s−1). At core CMS sits high-magnetic-field large-bore superconducting solenoid surrounding an all-silicon pixel strip tracker, lead-tungstate scintillating-crystals electromagnetic calorimeter, brass-scintillator sampling hadron...
CMS is a general purpose experiment, designed to study the physics of pp collisions at 14 TeV Large Hadron Collider (LHC). It currently involves more than 2000 physicists from 150 institutes and 37 countries. The LHC will provide extraordinary opportunities for particle based on its unprecedented collision energy luminosity when it begins operation in 2007.
This report presents the capabilities of CMS experiment to explore rich heavy-ion physics programme offered by CERN Large Hadron Collider (LHC). The collisions lead nuclei at energies , will probe quark and gluon matter unprecedented values energy density. prime goal this research is study fundamental theory strong interaction — Quantum Chromodynamics (QCD) in extreme conditions temperature, density parton momentum fraction (low-x).
The CMS silicon tracker, consisting of 1440 pixel and 15 148 strip detector modules, has been aligned using more than three million cosmic ray charged particles, with additional information from optical surveys. positions the modules were determined respect to trajectories an average precision 3–4 microns RMS in barrel 3–14 endcap most sensitive coordinate. results have validated by several studies, including laser beam cross-checks, track fit self-consistency, residuals overlapping module...
The performance of muon reconstruction in CMS is evaluated using a large data sample cosmic-ray muons recorded 2008. Efficiencies various high-level trigger, identification, and algorithms have been measured for broad range momenta, were found to be good agreement with expectations from Monte Carlo simulation. relative momentum resolution crossing the barrel part detector better than 1% at 10 GeV/c about 8% 500 GeV/c, latter being only factor two worse expected ideal alignment conditions....
The operation and general performance of the CMS electromagnetic calorimeter using cosmic-ray muons are described. These were recorded after closure detector in late 2008. is made lead tungstate crystals overall status 75848 channels corresponding to barrel endcap detectors reported. stability crucial operational parameters, such as high voltage, temperature electronic noise, summarised light monitoring system presented.
Commissioning studies of the CMS hadron calorimeter have identified sporadic uncharacteristic noise and a small number malfunctioning channels. Algorithms been developed to identify address these problems in data. The methods tested on cosmic ray muon data, single beam data collected with 2008. rejection algorithms can be applied LHC collision at trigger level or offline analysis. application is shown remove 90% events fake missing transverse energy above 100 GeV, which sufficient for...
The resolution and the linearity of time measurements made with CMS electromagnetic calorimeter are studied samples data from test beam electrons, cosmic rays, beam-produced muons. resulting measured by lead tungstate crystals is better than 100 ps for energy deposits larger 10 GeV. Crystal-to-crystal synchronization a precision 500 performed using muons produced first LHC beams in 2008.
The CMS Hadron Calorimeter in the barrel, endcap and forward regions is fully commissioned. Cosmic ray data were taken with without magnetic field at surface hall after installation experimental hall, hundred meters underground. Various measurements also performed during few days of beam LHC September 2008. Calibration parameters extracted, energy response HCAL determined from test has been checked.
The pixel detector of the Compact Muon Solenoid experiment consists three barrel layers and two disks for each endcap. was installed in summer 2008, commissioned with charge injections, operated 3.8 T magnetic field during cosmic ray data taking. This paper reports on first running experience presents results tracker performance, which are found to be line design specifications this detector. transverse impact parameter resolution measured a sample high momentum muons is 18 microns.
During autumn 2008, the Silicon Strip Tracker was operated with full CMS experiment in a comprehensive test, presence of 3.8 T magnetic field produced by superconducting solenoid. Cosmic ray muons were detected muon chambers and used to trigger readout all sub-detectors. About 15 million events tracker collected. The efficiency hit track reconstruction measured be higher than 99% consistent expectations from Monte Carlo simulation. This article details commissioning performance cosmic muons.
The CMS Level-1 trigger was used to select cosmic ray muons and LHC beam events during data-taking runs in 2008, estimate the level of detector noise. This paper describes components used, algorithms that were executed, synchronisation. Using data from extended runs, muon, electron/photon, jet triggers have been validated, their performance evaluated. Efficiencies found be high, resolutions good, rates as expected.
Studies of the performance CMS drift tube barrel muon system are described, with results based on data collected during Cosmic Run at Four Tesla. For most these data, solenoidal magnet was operated a central field 3.8 T. The analysis from 246 out total 250 chambers indicates very good reconstruction capability, coordinate resolution for single hit about 260 μm, and nearly 100% efficiency cells. track direction measured in bending plane is 1.8 mrad, to reconstruct segment chamber higher than...
In October and November 2008, the CMS collaboration conducted a programme of cosmic ray data taking, which has recorded about 270 million events. The Resistive Plate Chamber system, is part muon detection was successfully operated in full barrel. More than 98% channels were operational during exercise with typical efficiency 90%. this paper, performance detector these dedicated runs reported.
The alignment system for the muon spectrometer of CMS detector comprises three independent subsystems optical and analog position sensors. It aligns chambers with respect to each other central silicon tracker. System commissioning at full magnetic field began in 2008 during an extended cosmic ray run. succeeded tracking movements up 18 mm rotations several milliradians under forces. Depending on coordinate subsystem, achieved chamber precisions 140–350 μm 30–200 μrad, close precision...
The performance of the Local Trigger based on drift-tube system CMS experiment has been studied using muons from cosmic ray events collected during commissioning detector in 2008. properties are extensively tested and compared with simulation. effect random arrival time rays trigger is reported, results design expectations for proton-proton collisions previous measurements obtained muon beams.
The CMS Collaboration conducted a month-long data taking exercise, the Cosmic Run At Four Tesla, during October-November 2008, with goal of commissioning experiment for extended operation. With all installed detector systems participating, recorded 270 million cosmic ray events solenoid at magnetic field strength 3.8 T. This paper describes flow from through various online and offline computing systems, as well workflows used recording data, aligning calibrating detector, analysis data.
This paper describes the calibration procedure for drift tubes of CMS barrel muon system and reports main results obtained with data collected during a high statistics cosmic ray data-taking period. The goal is to determine, each cell, minimum time delay signals relative trigger, accounting velocity within cell. accuracy influenced by random arrival muons LHC clock cycle. A more refined analysis was performed offline reconstruction phase, which takes into account this feature events.
The CMS experiment uses self-triggering arrays of drift tubes in the barrel muon trigger to perform identification correct bunch crossing. is unique only if chain correctly synchronized. In this paper, synchronization performed during an extended cosmic ray run described and results are reported. random arrival time muons allowed several aspects be studied a simple method for fine Drift Tube Local Trigger at LHC developed.
The CMS High-Level Trigger (HLT) is responsible for ensuring that data samples with potentially interesting events are recorded high efficiency and good quality. This paper gives an overview of the HLT focuses on its commissioning using cosmic rays. selection triggers were deployed presented online grouping triggered into streams primary datasets discussed. Tools offline quality monitoring described, operational performance muon algorithms reviewed. average time taken dependence detector...