https://doi.org/10.1140/epjc/s10052-024-12415-3
Regular Article - Experimental Physics
Operation and performance of the MEG II detector
1
Joint Institute for Nuclear Research, 141980, Dubna, Russia
2
INFN Sezione di Pisa, Pisa, Italy
3
Dipartimento di Fisica dell’Università, Largo B. Pontecorvo 3, 56127, Pisa, Italy
4
ICEPP, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan
5
INFN Sezione di Genova, Genoa, Italy
6
Dipartimento di Fisica dell’Università, Via Dodecaneso 33, 16146, Genoa, Italy
7
INFN Sezione di Pavia, Pavia, Italy
8
Dipartimento di Fisica dell’Università, Via Bassi 6, 27100, Pavia, Italy
9
INFN Sezione di Roma, Rome, Italy
10
Dipartimento di Fisica dell’Università “Sapienza”, Piazzale A. Moro, 00185, Rome, Italy
11
INFN Sezione di Lecce, Lecce, Italy
12
Dipartimento di Matematica e Fisica dell’Università del Salento, Via per Arnesano, 73100, Lecce, Italy
13
Paul Scherrer Institut PSI, 5232, Villigen, Switzerland
14
Institute for Particle Physics and Astrophysics, ETH Zürich, Otto-Stern-Weg 5, 8093, Zurich, Switzerland
15
INFN Sezione di Napoli, Via Cintia, 80126, Naples, Italy
16
Budker Institute of Nuclear Physics of Siberian Branch of Russian Academy of Sciences, 630090, Novosibirsk, Russia
17
Novosibirsk State Technical University, 630092, Novosibirsk, Russia
18
Novosibirsk State University, 630090, Novosibirsk, Russia
19
Oliver Lodge Laboratory, University of Liverpool, L69 7ZE, Liverpool, UK
20
University of California, 92697, Irvine, CA, USA
21
KEK, High Energy Accelerator Research Organization, 1-1 Oho, 305-0801, Tsukuba, Ibaraki, Japan
22
Kobe University, 1-1 Rokkodai-cho, Nada-ku, 657-8501, Kobe, Hyogo, Japan
23
Department of Engineering, University of Palermo, Viale delle Scienze, Building 9, 90128, Palermo, Italy
24
INFN Sezione di Bari, Via Giovanni Amendola, 173, 70126, Bari, Italy
25
Dipartimento di Medicina e Chirurgia, Università LUM “Giuseppe Degennaro”, 70010, Casamassima, Bari, Italy
26
INFN Sezione di Pavia dell’Università, Via Bassi 6, 27100, Pavia, Italy
Received:
18
October
2023
Accepted:
5
January
2024
Published online:
26
February
2024
The MEG II experiment, located at the Paul Scherrer Institut (PSI) in Switzerland, is the successor to the MEG experiment, which completed data taking in 2013. MEG II started fully operational data taking in 2021, with the goal of improving the sensitivity of the 
decay down to 
almost an order of magnitude better than the current limit. In this paper, we describe the operation and performance of the experiment and give a new estimate of its sensitivity versus data acquisition time.
V. Baranov: Deceased.
© The Author(s) 2024
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Funded by SCOAP3.
