TREK experimental project at J-PARC

by Prof. Jun Imazato (KEK Japan)

Monday 21 Mar 2011, 14:15 → 15:45 Europe/Berlin

Seminar room 3344 (TUM - Physics Department - Garching)

J-PARC is the high intentity proton accelerator facility in Japan, which is since two years in operation. In addition to the long-baseline neutrino oscillation experiment, T2K, several experiments are performed in the field of particle and nuclear physics. We plan to perform a series of kaon decay experiments as the TREK experimental project by using a stopped kaon beam and the Superconducting Toroidal Spectrometer.The final goal is the search for time reversal invariance violation in K+ -> pi0 mu+ nu decay to investigate new physics beyond the Standard Model. We also plan to test the lepton universality in the kaon two body decays K+ -> mu+ nu and K + ->e+ nu, during the period of low accelerator power. A heavy sterile neutrino can be also looked for in the K+ -> mu+ Nu decay. For these experiments we have recently completed a low-momentum kaon beam line in the Hadron Hall of J-PARC. The detector system will be constructed by upgrading the E246 detector used in a KEK proton synchrotron experiment. Now we are doing R&D for new detector elements. In the seminar talk, physics of these experiments, the principle of measurements and the status of detector preparation will be presented.