MEG Documents

Proposal and related

Letter of Intent (May 1998)
- Addendum to LOI (May 1999)
Proposal to PSI (May 1999)
Note on the possible use of SINDRUM II as an experiment to search for μ → eγ
Pisa note on magnet (March 2000)
Proposal to INFN [gzipped PS] [PDF] (September 2002)
Proposal for a MEG Upgrade
Report on wire instability analysis (in Italian, May 2018)
Final report on wire instability analysis (in Italian, June 2019)
Input to the European Strategy for Particle Physics – 2020 update
- Charged Lepton Flavour Violation using Intense Muon Beams at Future Facilities (Dec 2018)
Input to the European Strategy for Particle Physics – 2026 update
- Charged Lepton Flavour Violations searches with muons: present and future (Mar 2025)

Major preprints

Preprint on the analysis of 2021–2022 MEG II data (Apr 2025)
Preprint on search for X17 particle (Nov 2024)
Preprint on the analysis of the first MEG II data (Oct 2023)
Preprint on the MEG II detector (Oct 2023)
Preprint on search for μ → eX, X → γγ with the MEG data (May 2020)
Preprint on the design of the MEG II experiment (Jan 2018)
Preprint on the final results of the MEG experiment (May 2016)
Preprint on the measurement of the μ → eννγ branching ratio (Dec 2013)
Preprint on the MEG detector (Mar 2013)
Preprint on the analysis of 2009–2011 data (Mar 2013)
Preprint on the analysis of 2009 & 2010 data (Jul 2011)
Preprint on the analysis of the first MEG data (Aug 2009)

Major articles

Published Paper on the analysis of the first MEG II data (Feb 2024)
Published Paper on the MEG II detector (Feb 2024)
Published Paper on search for μ → eX, X → γγ with the MEG data (Sept 2020)
Published Paper on the design of the MEG II experiment (May 2018)
Published Paper on the final results of the MEG experiment (Aug 2016)
Pablished Paper on the measurement of the μ → eννγ branching ratio (Feb 2016)
Published Paper on the analysis of 2009–2011 data (May 2013)
Published Paper on the MEG detector (April 2013)
Published Paper on the analysis of 2009 & 2010 data (October 2011)
Published Paper on the analysis of the first MEG data (April 2010)

The full list of publications is available at ELOG/Publication List.

Theses

Reports

Talks from

Conferences
Seminars
JPS meetings (in Japanese)
Workshops in Japan (in Japanese)
Review meetings
- 15-16th July 2002
  - T. Mori, "Goals of the experiment" [PDF]
  - A. Baldini, "Status in Italy" [PowerPoint, PDF]
  - P.-R. Kettle, "Beam line" [PowerPoint, PDF]
  - W. Ootani, "COBRA magnet" [PowerPoint, PDF]
  - J. Egger, "Drift chambers" [PowerPoint, PDF]
  - A. Baldini, "Timing counters" [PowerPoint, PDF]
  - S. Mihara, "Photon detector" [PowerPoint, PDF]
  - T. Haruyama, "Photon detector cryogenics" [PowerPoint, PDF]
  - G. Signorelli, "Simulation of the final photon detector" [PowerPoint, PDF]
  - M. Grassi, "Trigger" [PowerPoint, PDF]
  - S. Ritt, "Slow control and DAQ" [PowerPoint, PDF]
  - T. Mori, "Summary talk" [PDF]
- 3rd February 2003
  - P.-R. Kettle, "Beam tests" [PowerPoint, PDF]
  - S. Mihara, "LXe part A" [PowerPoint, PDF]
  - G. Signorelli, "LXe part B" [PowerPoint, PDF]
  - W. Ootani, "COBRA magnet" [PowerPoint, PDF]
  - M. Hildebrandt, "Drift chamber" [PowerPoint, PDF]
  - G. Cecchet, "Timing counter" [PowerPoint, PDF]
  - M. Grassi, "Trigger" [PowerPoint, PDF]
  - S. Ritt, "Computing" [PowerPoint, PDF]
  - S. Ritt, "Schedule" [PowerPoint, PDF]
  - S. Mihara, "Report on the Progress for μ → eγ Experiment" [Powerpoint]
- 11th July 2003
  - A. Baldini, Summary of the experiment status, financing and schedule
  - S. Mihara, Liquid Xenon Detector and related topics
  - W. Ootani, COBRA Magnet Status
  - J. Egger, Drift Chambers and Pattern Recognition
  - G. Cecchet, Timing Counters
  - P.-R. Kettle, Beam Line and Area Layout
  - S. Ritt, Electronics
  - S. Yamada, Software Coordination
- 11th February 2004
  - T. Mori, Summary Talk and Schedule Summary
  - S. Mihara, Liquid Xenon Detector Part I
  - A. Baldini, CEX Data Analysis and related
  - P.-R. Kettle, Beam Line Studies
  - W. Ootani, COBRA Magnet Status
  - J. Egger, Drift chambers
  - F. Gatti, Timing Counter Status
  - M Grassi, Status of the electronics systems
  - S. Yamada, Software Status
- 1st July 2004
  - A. Baldini, Introduction
  - F. Cei, Neutron Background Measurements
  - S. Mihara, Xenon Detector Status
  - J. Egger, Drift Chamber
  - F. Gatti, Timing Counter Status
  - P.-R. Kettle, Beam Line Status
  - W. Ootani, COBRA Magnet Status
  - S. Ritt, Status of the electronics systems
  - S. Yamada, Software Status
  - C. Gatoo, Offline Software
  - S. Ritt, Schedules
- 9th February 2005
  - T. Mori, Introduction
  - A. Baldini, LXe Calibration, PMT Tests, Cryostat Construction
  - S. Mihara, LXe beam Test Results
  - P.-R. Kettle, Beam Line Status
  - W. Ootani, COBRA Magnet Status
  - J. Egger, Drift Chamber
  - F. Gatti, Timing Counter Status
  - S. Ritt, Status of the Electronics Systems
  - C. Gatto, Software Status
  - S. Ritt, Schedules
- 19th July 2005
  - A. Baldini, Introduction
  - P.-R. Kettle, Beam Line Status
  - W. Ootani, COBRA Magnet Status
  - S. Mihara, LXe detector status report
  - C. Bemporad, LXe calorimeter calibration
  - J. Egger, Drift Chamber
  - F. Gatti, Timing Counter Status
  - M. Grassi, Status of the Electronics Systems
  - F. Cei, Software Status
  - S. Ritt, Schedules
  - A. Baldini et al., Technical Note #27
- 15th February 2006
  - P.-R. Kettle, Beam Line Status
  - W. Ootani, COBRA Magnet Status
  - G. Signorelli, LXe calorimeter calibration
  - S. Mihara, LXe detector status report
  - J. Egger, Drift Chamber
  - F. Gatti, Timing Counter Status
  - M. Grassi, Status of the Electronics Systems
  - S. Yamada, Software Status
  - T. Mori, Open user's meeting summary talk
- 27th June 2006
  - P.-R. Kettle, Beam Line Status
  - W. Ootani, COBRA Magnet Status
  - C. Bemporad, LXe calorimeter calibration
  - S. Mihara, LXe detector status report
  - J. Egger, Drift Chamber
  - P. Cattaneo, Timing Counter Status
  - M. Grassi, Status of the Electronics Systems
  - S. Yamada, Software Status
  - A. Baldini, Summary talk
- 14th February 2007
  - T. Mori, Short Summary
  - M. Hildebrandt, Run2006 summary
  - P.-R. Kettle, Beamline Status
  - P.-R. Kettle, Cockcroft-Walton Status
  - W. Ootani, COBRA Magnet Status
  - S. Mihara, LXe detector status report
  - J. Egger, Drift Chamber
  - M. Schneebeli, Drift Chamber Analysis
  - P. Cattaneo, Timing Counter Status
  - P. Cattaneo, TC Results from Frascati beam time
  - P. Cattaneo, TC Results from PSI beam time
  - S. Ritt, Status of the Electronics Systems
  - F. Cei, Software Status
  - A. Baldini, Summary talk
- 18th July 2007
  - A. Baldini, Summary Talk
  - W. Ootani, COBRA Status
  - S. Mihara, LXe detector status
  - G. Signorelli, Cockroft-Walton accelerator
  - F. Gatti, Timing Counter Status
  - J. Egger, Drift Chamber Status
  - M. Grassi, Electronics and DAQ
  - R. Sawada, Analysis and Software Status
- 20th February 2008
  - T. Mori, Summary Talk
  - P.-R. Kettle, MEG commissioning run 2007
  - S. Mihara, Liquid Xenon Calorimeter status
  - G. Signorelli, Calibrations with CW-accelerator
  - M. Hildebrandt, Drift Chamber hardware status
  - F. Gatti, Timing Counter status
  - D. Nicolo, Trigger review
  - S. Ritt, Data Acquisition status
  - T. Mori, Drift Chamber analysis
- 18th February 2009
  - P.-R. Kettle, Run 2008 Summary
  - D. Nicolo, Trigger and DAQ Operation
  - G. Gavoto, Timing Counter Status and Analysis
  - S. Mihara, Liquid Xenon Calorimeter Status
  - G. Signorelli, Liquid Xenon Calorimeter Analysis
  - M. Hildebrandt, Drift Chamber Status
  - W. Molzon, Drift Chamber Analysis
  - W. Ootani, Physics Aalysis
  - T. Mori, Summary and Prospects
- 17th February 2010
  - A. Baldini, Summary Talk
  - P.-R. Kettle, Run Summary 2009
  - D. Nicolo, Trigger Status
  - S. Ritt, Data Acquisition Status
  - A. Papa, Detector Calibrations
  - M. Hildebrandt, Drift Chamber Hardware Status
  - W. Molzon, DC Analysis Status
  - S. Mihara, Liquid Xenon Calorimeter Status
  - R. Sawada, Liquid Xenon Calorimeter Analysis
  - F. Gatti, Timing Counter Status
  - C. Voena, Timing Counter Analysis
  - F. Cei, MEG Physics Analysis Status
- Starting from 2011, the review talks are available from the Indico site. Public review meeting minutes are listed below: