The Search for μ+ → e+γ with 10–14 Sensitivity: The Upgrade of the MEG Experiment

@article{Baldini2021TheSF,
  title={The Search for $\mu$+ → e+$\gamma$ with 10–14 Sensitivity: The Upgrade of the MEG Experiment},
  author={Alessandro M. Baldini and Vladimir Baranov and Michele Biasotti and Gianluigi Boca and Paolo Walter Cattaneo and Gianluca Cavoto and Fabrizio Cei and Marco Chiappini and Gianluigi Chiarello and Alessandro Corvaglia and Federica Cuna and Giovanni dal Maso and Antonio de Bari and Matteo De Gerone and Marco Francesconi and Luca Galli and Giovanni Gallucci and Flavio Gatti and Francesco Grancagnolo and Marco Grassi and Dmitry Grigoriev and Malte Hildebrandt and Keiko Ieki and Fedor Ignatov and Toshiyuki Iwamoto and P. R. Kettle and Nikolay Khomutov and Satoru Kobayashi and Alexander Kolesnikov and Nikolay Kravchuk and Victor A. Krylov and N. A. Kuchinskiy and William Kyle and Terence Libeiro and Vladimir L Malyshev and M Meucci and Satoshi Mihara and William Richard 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 Marco Panareo and Angela Papa and Valerio Pettinacci and Alexander Popov and Francesco Renga and Stefan Ritt and Massimo Rossella and A. M. Rozhdestvensky and Patrick Schwendimann and Kohei Shimada and Giovanni Signorelli and Alexey Stoykov and Giovanni F. Tassielli and Kazuki Toyoda and Yusuke Uchiyama and Masashi Usami and Cecilia Voena and Kosuke Yanai and Kensuke Yamamoto and Takuya Yonemoto and Yu.V. Yudin},
  journal={Symmetry},
  year={2021}
}
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… Expand

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References

SHOWING 1-10 OF 35 REFERENCES
Calibration and monitoring of the MEG experiment by a proton beam from a Cockcroft–Walton accelerator
Abstract The MEG experiment at PSI searches for the decay μ → e γ at a level of ≈ 10 − 13 on the branching ratio BR ( μ → e γ / μ → tot ), well beyond the present experimental limit ( BR ≤ 1.2 × 10 −Expand
A Call for New Physics : The Muon Anomalous Magnetic Moment and Lepton Flavor Violation
Abstract We review how the muon anomalous magnetic moment ( g − 2 ) and the quest for lepton flavor violation are intimately correlated. Indeed the decay μ → e γ is induced by the same amplitude forExpand
Search for the lepton flavour violating decay μ+→ e +γ with the full dataset of the MEG experiment: MEG Collaboration
The final results of the search for the lepton flavour violating decay based on the full dataset collected by the MEG experiment at the Paul Scherrer Institut in the period 2009–2013 and totallingExpand
The MEG detector for μ+→e+γ decay search
The MEG (Mu to Electron Gamma) experiment has been running at the Paul Scherrer Institut (PSI), Switzerland since 2008 to search for the decay μ+→e+γ by using one of the most intense continuous μ+Expand
Charged Lepton Flavour Violation: An Experimental and Theoretical Introduction
Charged lepton flavour violating transitions would be a clear signal of new physics beyond the Standard Model. Their search has been carried out in a variety of channels, the most sensitive beingExpand
Implications of the Muon g-2 result on the flavour structure of the lepton mass matrix
The confirmation of the discrepancy with the Standard Model predictions in the anomalous magnetic moment by the Muon g-2 experiment at Fermilab points to a low scale of new physics. FlavourExpand
COMET Phase-I technical design report
The Technical Design for the COMET Phase-I experiment is presented in this paper. COMET is an experiment at J-PARC, Japan, which will search for neutrinoless conversion of muons into electrons in theExpand
Search for the decay μ+→e++e−+e+
SummaryA search for μ+→e++e−+e+ was conducted using counter techniques. The number of mesons stopped was 109; when multiplied by the efficiency for detecting a three-electron decay, the number becameExpand
Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm.
TLDR
The first results of the Fermilab National Accelerator Laboratory (FNAL) Muon g-2 Experiment for the positive muon magnetic anomaly are presented and the new experimental average of a_{μ}(Exp) increases the tension between experiment and theory to 4.2 standard deviations. Expand
The design of the MEG II experiment
The MEG experiment, designed to search for the $${\mu ^+ \rightarrow \hbox {e}^+ \gamma }$$μ+→e+γ decay, completed data-taking in 2013 reaching a sensitivity level of $${5.3\timesExpand
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