IFAE 2006 pp 339-343 | Cite as

The Liquid Xenon calorimeter of the MEG experiment

  • Fabrizio Cei
Conference paper


In the Standard Model (SM) of electroweak interactions the Lepton Flavour Violating (LFV) processes are forbidden at all; however almost all SM extensions predict processes which do not conserve the lepton number. In particular the supersymmetric models predict branching ratios for LFV reactions at level of 10−(13÷16), which should be experimentally observable. The µ → e γ process is one of the golden channels for the LFV observation [1, 6]. The present limit for the branching ratio (µ → )/(µ → ALL) is 1.2 × 10−11 [6] and the aim of the MEG experiment at Paul Scherrer Institute (PSI) is to improve this limit by a factor ∼ 100. This challenging goal requires refined and innovative detection techniques in order to reach very high resolutions in the measurement of γ and e + energy, momentum and timing. One of the key elements is the Liquid Xenon (LXe) e.m. calorimeter, the main subject of this paper.


Lepton Number Beam Test Lepton Flavour Violate Paul Scherrer Institute Muon Beam 
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  1. 1.
    E.P. Hincks and B. Pontecorvo: Can. J. Res. A 28, 29, (1950)Google Scholar
  2. 2.
    A. Van der Schaaf et al.: Nucl. Phys. A 340, 249, (1980)CrossRefADSGoogle Scholar
  3. 3.
    P. Depommier et al.: Phys. Rev. Lett. 39, 1113, (1977)CrossRefADSGoogle Scholar
  4. 4.
    R.D. Bolton et al.: Phys. Rev. D 38, 2077, (1988)CrossRefADSGoogle Scholar
  5. 5.
    W.W. Kinnison et al.: Phys. Rev. D 25, 2846, (1982)CrossRefADSGoogle Scholar
  6. 6.
    M. Ahmed et al.: Phys. Rev. D 65, 112002, (2002)CrossRefADSGoogle Scholar
  7. 7.
    MEG proposal to INFN, available at http://meg/ Scholar
  8. 8.
    A. Baldini et al.: approved by NIM, (2006)Google Scholar
  9. 9.
    A. Baldini et al.: Nucl. Inst. and Meth. A 545, 753, (2005)CrossRefADSGoogle Scholar

Copyright information

© Springer-Verlag Italia 2007

Authors and Affiliations

  • Fabrizio Cei
    • 1
  1. 1.INFN and University of PisaPisaItaly

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