Physics
Scientific paper
Mar 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aps..apr.b2001i&link_type=abstract
American Physical Society, APS April Meeting 2012, March 31-Apr 3, 2012, abstract #B2.001
Physics
Scientific paper
The MEG experiment, which searches for a lepton flavor violating muon decay, +circ;->e^+ γ, to explore new physics like supersymmetric grand unification, has started physics run since 2008 at Paul Scherrer Institute in Switzerland. Its innovative detector system, which consists of a 900 liter liquid xenon scintillation photon detector with 846 2 inch photomultiplier tubes and a positron spectrometer with a superconducting magnet, drift chamber, and timing counter, enables orders of magnitude better sensitivity than previous experiments. By using physics data collected in 2009 and 2010, we set a new 90% C.L. upper limit of 2.4x10-12 on the branching ratio of the +circ;->e^+ γ decay, which is the most stringent limit on the existence of this decay to date. The current status of the experiment as well as the latest results will be presented.
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