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

  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},
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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