|
|
||||||
|
| Leader: | V.V. Glagolev Z. Tsamalaidze |
| Deputy: | Yu.I. Davydov N.V. Khomutov |
| Scientific leader: | J.A. Budagov |
Participating countries and international organizations:
Belarus, Bulgaria, Czech Republic, France, Georgia, Germany, Italy, Japan, Kazakhstan, Russia, Slovakia, Switzerland, Ukraine, United Kingdom, USA.
Issues addressed and main goals of research:
The Mu2e experiment at Fermilab, COMET experiment at J-PARC 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. Conversion measurement at the level of 10 -17, which is the COMET goal, is a factor of 10000 better than the current experimental limit B(µ -+ Auµ e - + Au) < 7·10 -13 from SINDRUM-II at PSI. 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
Expected results in the current year
- 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.
- Filling the batch of Mu2e scintillation counters with CKIN and testing them for leakage.
- Maintenance 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.
- Рarticipation in the creation of an active scintillation target of a new type with a volume of about 2 cubic meters for the T2K experiment.
- R&D of thin-wall straw tubes for COMET. Development, production and tests of the straw detector and electromagnetic calorimeter prototype.
- Calibration of LYSO crystals.
- R&D of muon veto system 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) |
|
| 1. | Search for new physics in the charged lepton sector |
V.V. Glagolev Z. Tsamalaidze |
1 (2021-2021) |
| List of Activities | |||||
| Activity or Experiment | Leaders | ||||
| Laboratory or other Division of JINR Responsible person |
Main researchers | ||||
| 1. | Experiment Mu2e | V.V. Glagolev |
|
||
| DLNP | A.M. Artikov, N.V. Atanov, O.S. Atanova, V.Yu. Baranov, J.A. Budagov, Yu.I. Davydov, D.L. Demin, Yu.N. Kharzheev, V.I. Kolomoets, S.M. Kolomoets, A.V. Sazonova, A.N. Shalóugin, A.V. Simonenko, 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.S. Galoyan | ||||
| 2. | Experiment COMET | Z. Tsamalaidze |
|
||
| DLNP |
|
||||
| LIT | D. Goderidze, Yu.L. Kalinovsky, A. Khvedelidze | ||||
| BLTP | D. Aznabaev, A. Issadykov, G.A. Kozlov | ||||
| VBLHEP |
|
||||
| 3. | Experiment MEG II | N.V. Khomutov |
|
||
| DLNP | V.A. Baranov, V.V. Glagolev, Yu.I. Davydov, N.A. Kuchinsky, N.P. Kravchuk, V.L. Malyshev, A.M. Rozhdestvensky, A.O. Kolesnikov, V.A. Krylov | ||||
| 4. | Experiment PEN | N.A. Kuchinsky |
|
||
| 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 |
|
||
| DLNP | N.V. Atanov, A.O. Kolesnikov, A. V. Krasnoperov, V.V. Lyubushkin, V.L. Malyshev, S.V. Tereschenko, V.V. Tereschenko | ||||
| 6. | Experiment MUSPIN | V.N. Duginov |
|
||
| DLNP | E.I. Bunyatova, K.I. Gritsay, A.I. Rudenko, G.D. Soboleva | ||||
| FLNP | M. Balasoiu + 2 pers. | ||||
| 7. | Experiment TRITON | D.L. Demin |
|
||
| 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 | BSU |
| INP BSU | ||
| IP NASB | ||
| Bulgaria | Sofia | SU |
| Czech Republic | Prague | CTU |
| CU | ||
| France | Paris | IN2P3 |
| Georgia | Tbilisi | GTU |
| HEPI-TSU | ||
| UG | ||
| Italy | Frascati | INFN LNF |
| Pisa | UniPi | |
| Japan | Fukuoka | Kyushu Univ. |
| Osaka | Osaka Univ. | |
| Tsukuba | KEK | |
| Kazakhstan | Almaty | INP |
| Romania | Bucharest | IFIN-HH |
| Russia | Gatchina | NRC KI PNPI |
| Irkutsk | ISU | |
| Moscow | ITEP | |
| NNRU "MEPhI" | ||
| Moscow, Troitsk | INR RAS | |
| Novosibirsk | BINP SB RAS | |
| NSU | ||
| Slovakia | Bratislava | CU |
| IP SAS | ||
| Switzerland | Villigen | PSI |
| Ukraine | Kharkov | ISMA NASU |
| United Kingdom | Didcot | RAL |
| London | Imperial College | |
| USA | Batavia, IL | Fermilab |
| Charlottesville, VA | UVa | |
| Lexington, KY | UK |
