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02-2-1124-2015/2020
Priority:1
Status: Extended

Search for New Physics in Experiments with High-Intensity Muon Beams


Leader:     V.V. Glagolev
Deputy:     Yu.I. Davydov
Scientific leader:             J.A. Budagov


Participating Countries and International Organizations:
Belarus, Bulgaria, Czech Republic, Georgia, Germany, United Kingdom, France, Italy, Russia, Slovakia, Switzerland, USA, Ukraine, Japan.
Scientific Programme:
The muon anomalous magnetic moment aµ can be measured and computed to high precision. The comparison between experiment and the SM therefore provides a sensitive search for New Physics (NP). At present, both measurement and theory have sub-part-per-million (ppm) uncertainties, and the ``g-2 test'' is being used to constrain SM extensions. The difference between experiment and theory, aµ(Expt-SM) = (255 ± 80) x 10 -11 (3,2 , is a highly cited result and a possible harbinger of new TeV-scale physics. Potential explanations of the deviation include: supersymmetry, lepton substructure, dark matter loop etc., all well motivated by theory and consistent with other experimental constraints. Fermilab experiment has a plan to reduce the experimental uncertainty by a factor of 4 or more. A precise g-2 test, no matter where the final value lands, will sharply discriminate among models and will enter as one of the central observables in a global analysis of any SM extensions.
The Mu2e experiment at Fermilab is a dedicated search for the CLFV process µ - N e - N, which is the coherent conversion of a muon into an electron in the vicinity of a nucleus. Once neutrinos masses are included, the process is allowed but effectively still absent since the rate is proportional to ( m 2ij/M 2W) 2 , where m 2ij is the mass difference squared between i-th and j-th neutrino mass eigenstates, and MW is the mass of the W-boson. The predicted rates for the µ -N e -N and µ + e +gamma CLFV processes are less than 10 -50 each. This makes this process a very theoretically clean place to search for NP effects. In many NP models that include a description of neutrino mass, the rates for these processes are enormously enhanced so that they occur at a level to which Mu2e experiment will have sensitivity.
Participation in the creation of and testing theoretical views in the topics. Development of
Study of CP-violation in the lepton sector with the help of neutrino.
Study of hyperfine interactions of an acceptor impurity in semiconductors with the aid of negative muons. Investigation of the behavior of positive muons in systems with magnetic nanoparticles.

Expected main results in 2018:
  • Simulation for e.m. calorimeter calibration of the Mu2e experiment.

  • Tests of the CsI e.m. calorimeter elements on the gamma sources and electron beam.

  • Creation and test of the CRV (cosmic ray veto) modules and counters on proton beam and cosmic muons.

  • Tuning and support of the final version of visualization and control software.

  • Participation in data taking runs and data analysis.

  • Participation in the radiation hardness tests of the detector elements.

  • Analysis of the experimental data on the radiative pion decay collected by the PEN experiment.

  • Participation in development of the positron tracker for the MEG-II experiment, DAQ, data analysis.

  • Participation in the construction and tests of modules of scintillator counters for the veto system. Quality control.

  • Participation in the data taking and analysis of experimental data using CERN hadron beams.

  • Software development for data processing and analysis.

  • Study of the behavior of magnetic nanoparticles with high magnetic anisotropy by the muon spin rotation technique.

  • Data taking and data processing for p+t fusion reaction using the muon catalysis method.

List of projects:
  Project Leader Priority
(period of realisation)
1. Search for new physics in experiments
with the Fermilab high-intensity muon
beams
V.V. Glagolev 1   (2015-2020)

List of Activities
  Activity or Experiment Leaders
Status
  Laboratory or other
Division of JINR
Responsible person
Main researchers
1. Experiment Mu2e V.V. Glagolev
R&D
Realization
  DLNP A.M. Artikov, N.V. Atanov, O.S. Atanova, N.S. Azaryan, V.Yu. Baranov, V.Yu. Batusov, J.A. Budagov, D.Sh. Chokheli, Yu.I. Davydov, D.L. Demin, A.V. Guskov, Yu.N. Kharzheev, V.I. Kolomoets, S.M. Kolomoets, M.V. Lyablin, Yu.A. Koultchitski, V.M. Romanov, A.V. Sazonova, A.N. Shalˇugin, A.V. Simonenko, S.N. Studenov, I.A. Suslov, I.V. Titkova, V.V. Tereschenko, S.V. Tereschenko, Z.U. Usubov
  BLTP D.I. Kazakov, G.A. Kozlov, O.V. Tarasov
  LIT V.V. Korenkov, V.V. Uzhinsky
  VBLHEP A. Galoyan
2. Experiment Muon g-2 N.V. Khomutov
R&D
Realization
  DLNP V.A. Baranov, V.N. Duginov, N.P. Kravchuk, N.A. Kuchinsky, T.N. Mamedov , A.I. Rudenko, V.P. Volnykh
  VBLHE S.A. Movchan
  LRB V.A. Krylov
3. Experiment MEG-PEN N.A. Kuchinsky
Data processing
  DLNP V.A. Baranov, N.V. Khomutov, S.M. Korenchenko, N.P. Kravchuk, E.S. Kuzmin, A.M. Rozhdestvensky, E.P. Velicheva, V.P. Volnykh, A.S. Khrykin
  VBLHEP A.O. Kolesnikov
  BLTP Yu.M. Bystritsky
4. CERN Neutrino platform B.A. Popov
Data taking
Data processing
  DLNP N. Atanov, A. Krasnoperov, V. Lyubushkin, S. Tereschenko, V. Tereschenko
5. Experiment MUSPIN V.N. Duginov
T.N. Mamedov
Data taking
Data analysis
  DLNP E.I. Bunyatova, K.I. Gritsay, A.I. Rudenko, G.D. Soboleva
  FLNP M. Balasoiu + 2 pers.
6. Experiment TRITON D.L. Demin
Data analysis
  DLNP N.A. Baranova, A.I. boguslavsky, K.I. Gritsay, V.n. Duginov, V.I.Kolomoets, A.D. Konin, A.P. Kustov, T.N. Mamedov, A.I. Rudenko, Yu.A. Polyakov, S.A. Gustov, N.A. Shakun, E.V. Kolesov, V.I. Smirnov, E.D.Gorodnichev
  FLNR S.A. Yukhimchuk
  LRB V.B. Buchnev, V.Yu. Schegolev

Collaboration
Country or International
Organization
City Institute or Laboratory
Belarus Minsk INP BSU
Bulgaria Sofia SU
Georgia Tbilisi HEPI-TSU
Italy Pisa UniPi
Frascati INFN LNF
Russia Moscow, Troitsk INR RAS
Gatchina NRC KI PNPI
Romania Bucharest IFIN-HH
Slovakia Bratislava IP SAS
CU
Switzerland Villigen PSI
Ukraine Kharkov ISMA NASU
USA Batavia, IL Fermilab
Charlottesville, VA UVa
Lexington, KY UK

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