The design of the MEG II experiment: MEG II Collaboration

Baldini, A. M.; Baracchini, E.; Bemporad, C.; Berg, F.; Biasotti, M.; Boca, G.; Cattaneo, P. W.; Cavoto, G.; Cei, F.; Chiappini, M.; Chiarello, G.; Chiri, C.; Cocciolo, G.; Corvaglia, A.; de Bari, A.; De Gerone, M.; D’Onofrio, A.; Francesconi, M.; Fujii, Y.; Galli, L.; Gatti, F.; Grancagnolo, F.; Grassi, M.; Grigoriev, D. N.; Hildebrandt, M.; Hodge, Z.; Ieki, K.; Ignatov, F.; Iwai, R.; Iwamoto, T.; Kaneko, D.; Kasami, K.; Kettle, P. -R.; Khazin, B. I.; Khomutov, N.; Korenchenko, A.; Kravchuk, N.; Libeiro, T.; Maki, M.; Matsuzawa, N.; Mihara, S.; Milgie, M.; Molzon, W.; Mori, Toshinori; Morsani, F.; Mtchedilishvili, A.; Nakao, M.; Nakaura, S.; Nicolò, D.; Nishiguchi, H.; Nishimura, M.; Ogawa, S.; Ootani, W.; Panareo, M.; Papa, A.; Pepino, A.; Piredda, G.; Popov, A.; Raffaelli, F.; Renga, F.; Ripiccini, E.; Ritt, S.; Rossella, M.; Rutar, G.; Sawada, R.; Signorelli, G.; Simonetta, M.; Tassielli, G. F.; Uchiyama, Y.; Usami, M.; Venturini, M.; Voena, C.; Yoshida, K.; Yudin, Yu. V.; Zhang, Y.

doi:10.1140/epjc/s10052-018-5845-6

The MEG experiment, designed to search for the μ+→ e+γ decay, completed data-taking in 2013 reaching a sensitivity level of 5.3 × 10- 13for the branching ratio. In order to increase the sensitivity reach of the experiment by an order of magnitude to the level of 6 × 10- 14, a total upgrade, involving substantial changes to the experiment, has been undertaken, known as MEG II. We present both the motivation for the upgrade and a detailed overview of the design of the experiment and of the expected detector performance.

The design of the MEG II experiment: MEG II Collaboration

Baldini, A. M.;Baracchini, E.;Bemporad, C.;Berg, F.;Biasotti, M.;Boca, G.;Cattaneo, P. W.;Cavoto, G.;Cei, F.;Chiappini, M.;Chiarello, G.;Chiri, C.;Cocciolo, G.;Corvaglia, A.;de Bari, A.;De Gerone, M.;D’Onofrio, A.;Francesconi, M.;Fujii, Y.;Galli, L.;Gatti, F.;Grancagnolo, F.;Grassi, M.;Grigoriev, D. N.;Hildebrandt, M.;Hodge, Z.;Ieki, K.;Ignatov, F.;Iwai, R.;Iwamoto, T.;Kaneko, D.;Kasami, K.;Kettle, P. -R.;Khazin, B. I.;Khomutov, N.;Korenchenko, A.;Kravchuk, N.;Libeiro, T.;Maki, M.;Matsuzawa, N.;Mihara, S.;Milgie, M.;Molzon, W.;Mori, Toshinori;Morsani, F.;Mtchedilishvili, A.;Nakao, M.;Nakaura, S.;Nicolò, D.;Nishiguchi, H.;Nishimura, M.;Ogawa, S.;Ootani, W.;Panareo, M.;Papa, A.;Pepino, A.;Piredda, G.;Popov, A.;Raffaelli, F.;Renga, F.;Ripiccini, E.;Ritt, S.;Rossella, M.;Rutar, G.;Sawada, R.;Signorelli, G.;Simonetta, M.;Tassielli, G. F.;Uchiyama, Y.;Usami, M.;Venturini, M.;Voena, C.;Yoshida, K.;Yudin, Yu. V.;Zhang, Y.

2018-01-01

Abstract

The MEG experiment, designed to search for the μ+→ e+γ decay, completed data-taking in 2013 reaching a sensitivity level of 5.3 × 10- 13for the branching ratio. In order to increase the sensitivity reach of the experiment by an order of magnitude to the level of 6 × 10- 14, a total upgrade, involving substantial changes to the experiment, has been undertaken, known as MEG II. We present both the motivation for the upgrade and a detailed overview of the design of the experiment and of the expected detector performance.