INR RAS - international collaborations

European Organization for Nuclear Research - CERN

The Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC) is the one of four large experimental facilities. LHC program will address the fundamental questions in high energy particle physics, namely that of origin of the spontaneous symmetry breaking mechanism, testing grand unification models, search for supersymmetry (SUSY), new gauge bosons, etc.

The CMS detector is one of the largest international scientific collaborations in history. There are 2300 people working for CMS, 1940 of which are scientists and engineers. These people come from 179 institutes in 40 countries, spanning Europe, Asia, the Americas and Australia. The members from RUSSIA AND DUBNA MEMBER STATES (RDMS) created an organizational structure providing the necessary strength to take responsibility for the construction of detectors for CMS and appear as a single scientific body called RDMS CMS.
Institute for Nuclear Research as one of the RDMS CMS institutions plays an active role in CMS project. Main systems of electromagnetic calorimeter are developed and constructed by the INR members, including unique alveolar structures and vacuum phototriods. The researchers from Laboratory for physical processes modelling have investigated the possibility to search for lepton flavour violation processes using the CMS detector.

A Large Ion Collider Experiment at the LHC - project ALICE. An idea of possibility of quark-gluon plasma existance in nature attracted significant interes of scientific society and in late 1990-th a new generation experimental setup development has started for the ALICE experiment at European Center of Nuclear Research [CERN]. The Laboratory of Meson-Nuclear Interactions INR RAS participates in production of start-time detector [T0] for the ALICE experiment.
ALICE is a heavy-ion detector on the Large Hadron Collider (LHC) ring. It is designed to study the physics of strongly interacting matter at extreme energy densities, where a phase of matter called quark-gluon plasma forms.
The ALICE collaboration studies the quark-gluon plasma as it expands and cools, observing how it progressively gives rise to the particles that constitute the matter of our universe today.

Precision studies of CP asymmetries and rare decays in the B -
meson systems - project LHCb

Hadrons are particles that take part in the strong interactions – the force that binds quarks together and keeps atomic nuclei from falling apart. The SPS Heavy Ion and Neutrino Experiment NA61/SHINE studies the properties of the production of hadrons in collisions of beam particles (pions, and protons, beryllium, argon and xenon) with a variety of fixed nuclear targets.
NA61 is a large acceptance hadron spectometer with excellent capabilities for momentum, charge and mass measurements. The experimental facility consists of Time Projection Chambers, Time of Flight and Projectile Spectator Detectors.Physics goals:

  • Search for the critical point of strongly interacting matter.
  • Detailed study of the onset of deconfinement.
  • Hadron production reference measurements for neutrino (T2K) and cosmic-ray (Pierre Auger Observatory, KASCADE-Grande and KASCADE) experiments.
  • Study of high transverse momentum phenomena in proton-nucleus and proton-proton interactions.

The main aim of the NA62 experiment is to study rare kaon decays. Understanding these decays will help physicists to check some of the predictions the Standard Model makes about short-distance interactions. Specifically, NA62 will measure the rate at which the charged kaon decays into a charged pion and a neutrino-antineutrino pair.
The new, ultra-rare kaon decay experiment relies essentially on the following factors to achieve the required level of background rejection with respect to the signal channel

  • high-resolution timing - to support a high-rate environment;
  • kinematic rejection – involving cutting on the square of the missing mass of the observed particles in the decay with respect to the incident kaon vector;
  • particle identification of kaons, pions, muons, electrons and photons;
  • hermetic vetoing of photons out to large angles and of muons within the acceptance;
  • redundancy of information.

The CERN Axion Solar Telescope (CAST) aims to shed light on a 30 year old riddle of particle physics by detecting axions originating from the 15 million degree plasma in the Sun's core.

AEGIS - Antimatter Experiment Gravity Interferometry Spectroscopy is a physics experiment that takes place at the european laboratory CERN, using the antiprotons delivered by the AD accelerator.

The primary scientific goal of the AEGIS experiment is the direct measurement of the Earth’s gravitational acceleration g on antihydrogen. In the first phase of the experiment, a gravity measurement with 1% precision will be carried out by sending an antihydrogen beam through a classical Moire deflectometer coupled to a position sensitive detector. This will represent the first direct measurement of a gravitational effect on an antimatter system.

The ICARUS program concerns the usage of Liquid Argon (LAr) detector for studies of neutrinos from CNGS beam. The ICARUS detector filled with 600 tons of liquid argon, T600, has started data taking in 2010. The detector is placed at the undeground laboratory in Gran Sasso. The advantage of the LAr detector is its excellent spatial and calorimetric resolution which makes possible a perfect visualization of tracks of the charged particles.

В настоящее время в ЦЕРН в рамках программы модернизации Большого адронного коллайдера начато сооружение линейного ускорителя отрицательных ионов водорода Linac-4.

The CERN Neutrinos to Gran Sasso (CNGS) project. Appearance experiment to search for neutrino oscillation in the CERN neutrino beam in the Gran Sasso Laboratory - experiment OPERA

The central hadron calorimeter (HCAL) upgrades its photodetectors changing from HPD to SiPM - Silicon Photomultiplier. It offers a higher photon-detection efficiency and signal gain.

The experiment NA64 at the SPS CERN aims at the searches for new physics beyond the Standard model, The main focus is on the searches for new light, < 1 GeV particles from dark sectors which interact very weakly with the our matter. An example of such particle is the, so-called, dark photon, A', mixing with the ordinary photons. Interestingly, the existence of the A' could explain the discrepancy between the measured and predicted values of the muon anomalous magnetic moment. The search for the A' decaying invisible into the lighter dark sector particles is the main goal of NA64 in 2016. The experiment was prepared with the active participation of the INR team.

The LHC employs a novel computing system, a distributed computing and data storage infrastructure called the Worldwide LHC Computing Grid (WLCG). In ‘The Grid’, tens of thousands of standard PCs collaborate worldwide to have much more processing capacity than could be achieved by a single supercomputer, giving access to data to thousands of scientists all over the world.
The Worldwide LHC Computing Grid (WLCG) project is a global collaboration of more than 150 computing centres in nearly 40 countries, linking up national and international grid infrastructures.
The mission of the WLCG project is to provide global computing resources to store, distribute and analyse the ~25 Petabytes (25 million Gigabytes) of data annually generated by the Large Hadron Collider (LHC) at CERN on the Franco-Swiss border.

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