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  Main directions of HEPD PNPI

H i g h    E n e r g y   P h y s i c s

HEPD participation in the LHC projects:

Overall view of the LHC experiments A new stage in high energy physics is related with the construction of Large Hadron Collider (LHC) at CERN for proton-proton collisions (6,5 TeV+6,5 TeV). LHC has been launched at 2009. HEP Division participated in the design and construction of the all 4 major detectors for LHC: ATLAS,CMS, ALICE, LHCb. HEPD physicists are involved into data taking and data analysis at LHC.
(For more detail review see PNPI HEPD Report "Participation in LHC experiments" (.pdf - 4Mb), in report "Main scientific activities of High Energy Physics Division in 2007-2012" - pages 24-73) und in report "HEPD in 2013-2018. The main directions of scientific activity - pages 22-133.
( .pdf = 45 Mb).

CMS project

3d view of the CMS detector PNPI project leader: A.A.Vorobyov, V.T.Kim, Yu.M.Ivanov

HEP Division participates in construction of the End Cap Muon System of the CMS Detector. PNPI should build 120 six-plane Muon Chamberscontaining about 500000 anode wires.
Also, HEPD is involved in development of the chamber electronics, the multi-channel high voltage system, and the muon trigger system.
(For more detail review see article "CMS EXPERIMENT" in PNPI HEPD Report " Participation in LHC experiments" -
page 6), article "CMS EXPERIMENT" in report "HEPD in 2007-2012" - pages 24-35) and article "Experiment CMS in LHC" in report "HEPD in 2013-2018" - pages 22-31).
Publications see here.

ATLAS project

Overall layout of the Atlas Detector PNPI project leader: O.L.Fedin

ATLAS is a general purpose collider detector at LHC.
HEP Division participates in construction of the Transition Radiation Tracker (TRT) which is a part of the ATLAS Inner Detector. The main contribution of PNPI will be construction of 50 four-plane End Cap TRT modules containing 150000 straw tubes.
(For more detail review see article "TRANSITION RADIATION TRACKER FOR ATLAS PROJECT" in PNPI HEPD Report " Participation in LHC experiments" - page 15), article "ATLAS EXPERIMENT" in report "HEPD in PNPI 2007-2012" - pages 36-48) and article "Experiment ATLAS in LHC" in report "HEPD in PNPI 2013-2018" - pages 32-39).
Publications see here.

LHCb project

LHCb PNPI project leader: A.A. Dzyuba (former project leader A.A. Vorobyev)

LHCb is an international collaboration of more than 800 physicists from 62 institutions, who have designed, built and operated a collider detector at the CERN Large Hadron Collider (LHC).
      Main physics goals are precision tests of the Standard Model (SM) in the heavy quark sector via: measurements of the parameters of the rare decays of heavy hadrons and over constraining measurements of the parameters of the quark mixing matrix (Cabibbo-Kobayashi-Maskawa). Another goal of the LHCb experiment is the precision spectroscopy of heavy hadrons to understand the Quantum Chromodynamics the theory of the strong interaction.
      During Run I, the LHC was operated at an pp centre-of-mass energy of 7 and 8 TeV, and the LHCb experiment has collected an experimental data samples corresponding to 1 fb-1 and 2 fb-1 of an integrated luminosity respectively. The second LHC Run was finished at the end of 2018. During Run II LHC was operated at an pp centre-of-mass energy of 13 TeV and allowed LHCb to collect the data sample corresponding to more than 6 fb-1 of an integrated luminosity.
      PNPI was involved in the LHCb project through the design, production, commissioning and operation of the LHCb muon system. PNPI physicists took part in the data analysis, including QCD, charm and b-physics studies. Among main LHCb physics results are the discovery of new heavy particles including one, which have an exotic nature (so-called pentaquarks and tetraquarks), the precise measurements of the parameters of the elements of the CKM matrix, search for the rare decays of the heavy hadrons, as well as QCD production and spectroscopy studies. This report presents several main LHCb results obtained in 2012-2018 years.
      For more detail review see article "LHCb EXPERIMENT" in PNPI HEPD Report "Participation in LHC experiments" - page 22), and article "LHCb Experiment" in report "Main scientific activities of High Energy Physics Division in 2007-2012" - pages 49-60), and article "Experiment LHCb in LHC" in PNPI HEPD Report "HEPD in PNPI 2013-2018" - pages 40-48).
      LHCb publications are available at the website of experiment.
Publications see here.

ALICE project

The general view of the ALICE detector PNPI project leader: V.M.Samsonov

ALICE detector is dedicated for search of quark-gluon plasma in heavy-ion collisions at LHC. HEPD is involved in R&D and construction of proportional chambers with cathode readout for End Cap Muon System of ALICE detector.
(For more detail review see article "PNPI IN ALICE" in PNPI HEPD Report " Participation in LHC experiments" - page 30) and article "ALICE Experiment" in report "Main scientific activities of High Energy Physics Division in 2007-2012" - pages 61-73), and article "Experiment ALICE in LHC" in PNPI HEPD Report " 2013-2018" - pages 49-57).
Publications see here.

UA9 project

 experiment UA9 PNPI project leader: Yu.M.Ivanov

The experiment UA9 proved the possibility of halting proton beams in the LHC using crystal optics developed at PNPI (pdf). This can be of great importance in the planned increase in the luminosity of the LHC. It was decided to install an experimental collimation station directly in the LHC ring.
(For more detail review see article UA9 in article in page 22 "Scientific environments"- the newspaper for all - "From the physics of nucleus and particles to the production of ultrahigh-energy beams - laboratory history")
News from CERN: "Crystal cleans the LHC bundle" ,
and article "COLLIMATION OF THE LARGE HADRON COLLIDER BEAMS WITH CRYSTALS" in PNPI HEPD Report " 2013-2018" - pages 124-133).

 experiment SHiP PNPI project leader:   V.Kim

Since 2015, the HEEP NRC KI - PNPI has been actively involved in the preparation of the SHiP (Search for Hidden Particles) experiment to search for neutral weakly interacting leptons, which may be dark matter particles, on the beam of the modernized SPS accelerator at CERN. The spectrometric track detector of the SHiP experiment (SHiP spectrometer tracker, SST tracker) is one of the key subdetectors and is designed to measure the momentum and coordinates of the decay vertex of new particles - candidates for the role of dark matter. It is proposed to measure the coordinates of tracks of charged daughter particles using thin-walled drift tubes (straw).
      The PNPI group is actively developing the design of the SST central tracker, its readout electronics, studying the characteristics of drift tube prototypes and developing their manufacturing technology, as well as developing software for realistic modeling of detector signals.
      (For more information about the participation of PNPI in the SHiP experiment, see the article "SHiP: SEARCH FOR HIDDEN PARTICLES" : SEARCH FOR HIDDEN PARTICLES" in the collection "HEPD in 2013-2018" - pages 326-336).


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