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| 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.
Issues addressed and main goals of research:
The muon anomalous magnetic moment aµ can be measured and computed to a high precision. The comparison between experiment and the SM 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. The 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 and the MEG II experiment at PSI are a dedicated search for the CLFV processes µ - N
e - N, µ + e +
. Once neutrinos masses are included, the process is allowed but still effectively absent since the rate is proportional to (m 2ij/M 2W) 2 , where m 2ij is the mass difference squared between ith and jth neutrino mass eigenstates, and MW is the mass of the W boson. The predicted rates for the µ -N e -N and µ + e + 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 and tests of the theoretical views in the topics. Study of CP-violation in the lepton sector with the help of neutrinos. 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 results in the current year:
- Simulation for e.m. calorimeter calibration of the Mu2e experiment.
- Tests of the CsI and BaF2 e.m. calorimeter elements with the gamma sources and electron beam.
- Participation in the construction and tests of modules of scintillator counters for the veto system. Quality control.
- Maintenance of the final version of the visualization and control software.
- Development and tests of the Mu2e e.m. calorimeter preamplifiers at JINR.
- 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 the development of the positron tracker for the MEG-II experiment, DAQ, data ana-lysis.
- Participation in the data taking and analysis of experimental data obtained with 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 ro-tation technique.
- Data analysis of the p+t synthesis using the muon catalysis method.
| List of projects: | |||
| Project | Leader | Priority (period of realisation) |
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| 1. | Search for new physics in experiments with high-intensity muon beams |
V.V. Glagolev | 1 (2015-2020) |
| List of Activities | |||||
| Activity or Experiment | Leaders | ||||
| Laboratory or other Division of JINR Responsible person |
Main researchers | ||||
| 1. | Experiment Mu2e | V.V. Glagolev |
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| 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, Yu.A. Koultchitski, M.V. Lyablin, V.M. Romanov, A.V. Sazonova, A.N. Shalóugin, A.V. Simonenko, S.N. Studenov, I.A. Suslov, I.V. Titkova, V.V. Tereschenko, S.V. Tereschenko, Z.U. Usubov, I.K. Zimin | ||||
| BLTP | D.I. Kazakov, G.A. Kozlov, O.V. Tarasov | ||||
| LIT | V.V. Korenkov, V.V. Uzhinsky | ||||
| VBLHEP | A.S. Galoyan | ||||
| 2. | Experiment Muon g-2 | N.V. Khomutov |
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| DLNP | V.A. Baranov, V.N. Duginov, N.A. Kuchinsky, N.P. Kravchuk, A.I. Rudenko, V.P. Volnykh | ||||
| VBLHE | S.A. Movchan | ||||
| LRB | V.A. Krylov | ||||
| 3. | Experiment MEG II | N.V. Khomutov |
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| DLNP | V.A. Baranov, V.V. Glagolev, Yu.I. Davydov, N.A. Kuchinsky, N.P. Kravchuk, A.V. Krasnoperov, V.L. Malyshev, A.M. Rozhdestvensky, A.V. Simonenko, I.V. Titkova | ||||
| VBLHEP | A.O. Kolesnikov | ||||
| LRB | V.A. Krylov | ||||
| 4. | Experiment PEN | N.A. Kuchinsky |
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| DLNP | V.A. Baranov, N.V. Khomutov, S.M. Korenchenko, A.S. Khrykin, E.S. Kuzmin, A.M. Rozhdestvensky, E.P. Velicheva, V.P. Volnykh | ||||
| BLTP | Yu.M. Bystritsky | ||||
| 5. | CERN Neutrino platform | B.A. Popov |
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| DLNP | N.V. Atanov, A. V. Krasnoperov, V.V. Lyubushkin, S.V. Tereschenko, V.V. Tereschenko | ||||
| 6. | Experiment MUSPIN | V.N. Duginov |
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| DLNP | E.I. Bunyatova, K.I. Gritsay, A.I. Rudenko, G.D. Soboleva | ||||
| FLNP | M. Balasoiu + 2 pers. | ||||
| 7. | Experiment TRITON | D.L. Demin |
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| DLNP | N.A. Baranova, A.I. Boguslavsky, V.N. Duginov, E.D. Gorodnichev, K.I. Gritsay, S.A. Gustov, V.I. Kolomoets, E.V. Kolesov, A.D. Konin, A.P. Kustov, A.I. Rudenko, Yu.A. Polyakov, N.A. Shakun, V.I. Smirnov, Z.U. Usubov | ||||
| 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 | Frascati | INFN LNF | |
| Pisa | UniPi | ||
| Russia | Moscow, Troitsk | INR RAS | |
| Gatchina | NRC KI PNPI | ||
| Romania | Bucharest | IFIN-HH | |
| Slovakia | Bratislava | CU | |
| IP SAS | |||
| Switzerland | Villigen | PSI | |
| Ukraine | Kharkov | ISMA NASU | |
| USA | Batavia, IL | Fermilab | |
| Charlottesville, VA | UVa | ||
| Lexington, KY | UK |
