The search for µ+ → e+γ with 10−14 sensitivity: The upgrade of the meg experiment

Standard

The search for µ⁺ → e⁺γ with 10⁻¹⁴ sensitivity: The upgrade of the meg experiment. / MEG experiment.

In: Symmetry, Vol. 13, No. 9, 1591, 09.2021.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{18d69fc1478f41ab9e9561931ee57155,

title = "The search for µ+ → e+γ with 10−14 sensitivity: The upgrade of the meg experiment",

abstract = "The MEG experiment took data at the Paul Scherrer Institute in the years 2009–2013 to test the violation of the lepton flavor conservation law, which originates from an accidental symmetry that the Standard Model of elementary particle physics has, and published the most stringent limit on the charged lepton flavor violating decay µ+ → e+γ: BR(µ+ → e+γ) < 4.2 × 10−13 at 90% confidence level. The MEG detector has been upgraded in order to reach a sensitivity of 6 × 10−14 . The basic principle of MEG II is to achieve the highest possible sensitivity using the full muon beam intensity at the Paul Scherrer Institute (7 × 107 muons/s) with an upgraded detector. The main improvements are better rate capability of all sub-detectors and improved resolutions while keeping the same detector concept. In this paper, we present the current status of the preparation, integration and commissioning of the MEG II detector in the recent engineering runs.",

keywords = "High intensity experiment, Lepton flavor violation, Particle detector, Physics beyond the Standard Model, Rare muon decay",

author = "{MEG experiment} and Baldini, {Alessandro M.} and Vladimir Baranov and Michele Biasotti and Gianluigi Boca and Cattaneo, {Paolo W.} and Gianluca Cavoto and Fabrizio Cei and Marco Chiappini and Gianluigi Chiarello and Alessandro Corvaglia and Federica Cuna and {Dal Maso}, Giovanni and {de Bari}, Antonio and {De Gerone}, Matteo and Marco Francesconi and Luca Galli and Giovanni Gallucci and Flavio Gatti and Francesco Grancagnolo and Marco Grassi and Grigoriev, {Dmitry N.} and Malte Hildebrandt and Kei Ieki and Fedor Ignatov and Toshiyuki Iwamoto and Kettle, {Peter Raymond} and Nikolay Khomutov and Satoru Kobayashi and Alexander Kolesnikov and Nikolay Kravchuk and Victor Krylov and Nikolay Kuchinskiy and William Kyle and Terence Libeiro and Vladimir Malyshev and Manuel Meucci and Satoshi Mihara and William Molzon and Toshinori Mori and Alexander Mtchedlishvili and Mitsutaka Nakao and Donato Nicol{\`o} and Hajime Nishiguchi and Shinji Ogawa and Rina Onda and Wataru Ootani and Atsushi Oya and Dylan Palo and Alexander Popov and Yudin, {Yury V.}",

note = "Funding Information: This research was funded by DOE DEFG02-91ER40679 (USA), INFN, MIUR Montalcini D.M. 2014 n. 975 (Italy), JSPS Core-to-Core Program, A. Advanced Research Networks JPJSCCA20180004, JSPS KAKENHI Grant Numbers JP26000004, JP18K13557, JP19J13635, JP19J21535, JP19J21730, JP20H00154, JP21H00065 (Japan), the Russian Federation Ministry of Science and Higher Education (Russia), and Schweizerischer Nationalfonds (SNF) Grant 200020_172706 and Grant 206021_177038 (Switzerland). Acknowledgments: We are grateful for the support and co-operation provided by PSI as the host laboratory and to the technical and engineering staff of our institutes. Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2021",

month = sep,

doi = "10.3390/sym13091591",

language = "English",

volume = "13",

journal = "Symmetry",

issn = "2073-8994",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "9",

}

RIS

TY - JOUR

T1 - The search for µ+ → e+γ with 10−14 sensitivity: The upgrade of the meg experiment

AU - MEG experiment

AU - Baldini, Alessandro M.

AU - Baranov, Vladimir

AU - Biasotti, Michele

AU - Boca, Gianluigi

AU - Cattaneo, Paolo W.

AU - Cavoto, Gianluca

AU - Cei, Fabrizio

AU - Chiappini, Marco

AU - Chiarello, Gianluigi

AU - Corvaglia, Alessandro

AU - Cuna, Federica

AU - Dal Maso, Giovanni

AU - de Bari, Antonio

AU - De Gerone, Matteo

AU - Francesconi, Marco

AU - Galli, Luca

AU - Gallucci, Giovanni

AU - Gatti, Flavio

AU - Grancagnolo, Francesco

AU - Grassi, Marco

AU - Grigoriev, Dmitry N.

AU - Hildebrandt, Malte

AU - Ieki, Kei

AU - Ignatov, Fedor

AU - Iwamoto, Toshiyuki

AU - Kettle, Peter Raymond

AU - Khomutov, Nikolay

AU - Kobayashi, Satoru

AU - Kolesnikov, Alexander

AU - Kravchuk, Nikolay

AU - Krylov, Victor

AU - Kuchinskiy, Nikolay

AU - Kyle, William

AU - Libeiro, Terence

AU - Malyshev, Vladimir

AU - Meucci, Manuel

AU - Mihara, Satoshi

AU - Molzon, William

AU - Mori, Toshinori

AU - Mtchedlishvili, Alexander

AU - Nakao, Mitsutaka

AU - Nicolò, Donato

AU - Nishiguchi, Hajime

AU - Ogawa, Shinji

AU - Onda, Rina

AU - Ootani, Wataru

AU - Oya, Atsushi

AU - Palo, Dylan

AU - Popov, Alexander

AU - Yudin, Yury V.

N1 - Funding Information: This research was funded by DOE DEFG02-91ER40679 (USA), INFN, MIUR Montalcini D.M. 2014 n. 975 (Italy), JSPS Core-to-Core Program, A. Advanced Research Networks JPJSCCA20180004, JSPS KAKENHI Grant Numbers JP26000004, JP18K13557, JP19J13635, JP19J21535, JP19J21730, JP20H00154, JP21H00065 (Japan), the Russian Federation Ministry of Science and Higher Education (Russia), and Schweizerischer Nationalfonds (SNF) Grant 200020_172706 and Grant 206021_177038 (Switzerland). Acknowledgments: We are grateful for the support and co-operation provided by PSI as the host laboratory and to the technical and engineering staff of our institutes. Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2021/9

Y1 - 2021/9

N2 - The MEG experiment took data at the Paul Scherrer Institute in the years 2009–2013 to test the violation of the lepton flavor conservation law, which originates from an accidental symmetry that the Standard Model of elementary particle physics has, and published the most stringent limit on the charged lepton flavor violating decay µ+ → e+γ: BR(µ+ → e+γ) < 4.2 × 10−13 at 90% confidence level. The MEG detector has been upgraded in order to reach a sensitivity of 6 × 10−14 . The basic principle of MEG II is to achieve the highest possible sensitivity using the full muon beam intensity at the Paul Scherrer Institute (7 × 107 muons/s) with an upgraded detector. The main improvements are better rate capability of all sub-detectors and improved resolutions while keeping the same detector concept. In this paper, we present the current status of the preparation, integration and commissioning of the MEG II detector in the recent engineering runs.

AB - The MEG experiment took data at the Paul Scherrer Institute in the years 2009–2013 to test the violation of the lepton flavor conservation law, which originates from an accidental symmetry that the Standard Model of elementary particle physics has, and published the most stringent limit on the charged lepton flavor violating decay µ+ → e+γ: BR(µ+ → e+γ) < 4.2 × 10−13 at 90% confidence level. The MEG detector has been upgraded in order to reach a sensitivity of 6 × 10−14 . The basic principle of MEG II is to achieve the highest possible sensitivity using the full muon beam intensity at the Paul Scherrer Institute (7 × 107 muons/s) with an upgraded detector. The main improvements are better rate capability of all sub-detectors and improved resolutions while keeping the same detector concept. In this paper, we present the current status of the preparation, integration and commissioning of the MEG II detector in the recent engineering runs.

KW - High intensity experiment

KW - Lepton flavor violation

KW - Particle detector

KW - Physics beyond the Standard Model

KW - Rare muon decay

UR - http://www.scopus.com/inward/record.url?scp=85114316715&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/bf19d2d1-8fa8-327d-8288-94ec0c6223c5/

U2 - 10.3390/sym13091591

DO - 10.3390/sym13091591

M3 - Article

AN - SCOPUS:85114316715

VL - 13

JO - Symmetry

JF - Symmetry

SN - 2073-8994

IS - 9

M1 - 1591

ER -

ID: 35329865