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Status: Extended

Experiment COMET at J-PARC

Leader:     Z. Tsamalaidze

Participating countries and international organizations:
Belarus, Czech Republic, Georgia, Germany, France, Kazakhstan, Russia, United Kingdom, Japan.

Issues addressed and main goals of research:
The goal of the COMET experiment at the J-PARC accelerator is the search for the neutrinoless muon-electron conversion µ - N e - N, in which the lepton number in the charged sector does not conserve. Within the SM modified with allowance for the neutrino oscillations, the expected rate is less than 10 -50, and therefore any observation of the conversion would be a clear signal of new physics beyond the SM. 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 -+ Au e - + Au) < 7·10 -13 from SINDRUM-II at PSI.

Expected results in the current year:
  • 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.

List of Activities
  Activity or Experiment Leaders
      Laboratory or other
    Division of JINR
Responsible person
Main researchers
1. Experiment COMET Z. Tsamalaidze
  DLNP K. Abylay, V.N. Duginov, P.G. Evtukhovich, I.L. Evtukhovich, K.I. Gritsai, V.A. Kalinnikov, Kh. Khubashvili, E.S. Kaneva, M.D. Kravchenko, A.S. Moiseenko, A.V. Pavlov, B.M. Sabirov, A.G. Samartsev, N. Tsverava, E.P. Velicheva, A.D. Volkov
  LIT G. Adamov, D. Goderidze, Yu.L. Kalinovsky, A. Khvedelidze
  BLTP D. Aznabaev, A. Issadykov, G.A. Kozlov
  VBLHEP D. Baigarashev, V.V. Elsha, T.L. Enik, S.A. Movchan, S.N. Shkarovsky

Country or International
City Institute or Laboratory
Belarus Minsk BSU
Czech Republic Prague CU
France Paris IN2P3
Georgia Tbilisi GTU
Germany Dresden TU Dresden
Japan Fukuoka Kyushu Univ.
Osaka Osaka Univ.
Tsukuba KEK
Kazakhstan Almaty INP
Russia Moscow ITEP
Novosibirsk BINP SB RAS
United Kingdom London Imperial College
Didcot RAL

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