In May 2016 the MEG experiment published the world's leading upper limit on the branching ratio of this decay:
at 90% confidence level, [2] based on data collected in 2009–2013. This improved the MEG limit from the prior MEGA experiment[3] by a factor of about 28.
Apparatusedit
MEG uses a continuous muon beam (3 × 107/s) incident on a plastic target. The decay is reconstructed to look for a back-to-back positron and monochromatic photon (52.8 MeV). A liquid xenon scintillator with photomultiplier tubes measure the photon energy, and a drift chamber in a magnetic field detects the positrons.
The MEG collaboration presented upgrade plans for MEG-II at the Particles and Nuclei International Conference 2014, with one order of magnitude greater sensitivity, and increased muon production, to begin data taking in 2017.[4] More experiments are planned to explore rare muon transitions, such as Comet (experiment), Mu2e and Mu3e.
Referencesedit
^"MEG goes in search of the forbidden". CERN Courier.
^Baldini, A. M.; et al. (MEG collaboration) (May 2016). "Search for the Lepton Flavour Violating Decay μ+→e+γ with the Full Dataset of the MEG Experiment". arXiv:1605.05081 [hep-ex].
^Brooks, M. L.; et al. (MEGA Collaboration) (23 August 1999). "New limit for the lepton-family-number nonconserving decay μ+→e+γ". Physical Review Letters. 83 (8): 1521–1524. arXiv:hep-ex/9905013. Bibcode:1999PhRvL..83.1521B. doi:10.1103/PhysRevLett.83.1521. S2CID 119354296.
^Renga, F (2014). "Latest results of MEG and status of MEG-II". arXiv:1410.4705 [hep-ex].
gamma, particle, physics, experiment, dedicated, measuring, decay, muon, into, electron, photon, decay, mode, which, heavily, suppressed, standard, model, lepton, flavour, conservation, enhanced, supersymmetry, grand, unified, theories, located, paul, scherrer. The Mu to E Gamma MEG is a particle physics experiment dedicated to measuring the decay of the muon into an electron and a photon a decay mode which is heavily suppressed in the Standard Model by lepton flavour conservation but enhanced in supersymmetry and grand unified theories 1 It is located at the Paul Scherrer Institute and began taking data September 2008 Contents 1 Results 2 Apparatus 3 References 4 External linksResults editIn May 2016 the MEG experiment published the world s leading upper limit on the branching ratio of this decay B m e g lt 4 2 10 13 displaystyle mathrm B mu to e gamma lt 4 2 times 10 13 nbsp at 90 confidence level 2 based on data collected in 2009 2013 This improved the MEG limit from the prior MEGA experiment 3 by a factor of about 28 Apparatus editMEG uses a continuous muon beam 3 107 s incident on a plastic target The decay is reconstructed to look for a back to back positron and monochromatic photon 52 8 MeV A liquid xenon scintillator with photomultiplier tubes measure the photon energy and a drift chamber in a magnetic field detects the positrons The MEG collaboration presented upgrade plans for MEG II at the Particles and Nuclei International Conference 2014 with one order of magnitude greater sensitivity and increased muon production to begin data taking in 2017 4 More experiments are planned to explore rare muon transitions such as Comet experiment Mu2e and Mu3e References edit MEG goes in search of the forbidden CERN Courier Baldini A M et al MEG collaboration May 2016 Search for the Lepton Flavour Violating Decay m e g with the Full Dataset of the MEG Experiment arXiv 1605 05081 hep ex Brooks M L et al MEGA Collaboration 23 August 1999 New limit for the lepton family number nonconserving decay m e g Physical Review Letters 83 8 1521 1524 arXiv hep ex 9905013 Bibcode 1999PhRvL 83 1521B doi 10 1103 PhysRevLett 83 1521 S2CID 119354296 Renga F 2014 Latest results of MEG and status of MEG II arXiv 1410 4705 hep ex External links editMEG II experiment record on INSPIRE HEP MEG home page nbsp This particle physics related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Mu to E Gamma amp oldid 1175917110, wikipedia, wiki, book, books, library,
