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Message ID: 72 Entry time: Tue Sep 8 16:20:54 2009

Type:	Article
Authors:	MEG collaboration: J. Adam, X. Bai, A. Baldini, E. Baracchini, A. Barchiesi, C. Bemporad, G. Boca, P. W. Cattaneo, G. Cavoto, G. Cecchet, F. Cei, C. Cerri, A. De Bari, M. De Gerone, T. Doke, S. Dussoni, J. Egger, L. Galli, G. Gallucci, F. Gatti, B. Golden, M. Grassi, D. N. Grigoriev, T. Haruyama, M. Hildebrandt, Y. Hisamatsu, F. Ignatov, T. Iwamoto, D. Kaneko, P.-R. Kettle, B. I. Khazin, O. Kiselev, A. Korenchenko, N. Kravchuk, A. Maki, S. Mihara, W. Molzon, T. Mori, D. Mzavia, H. Natori, R. Nard\`o, D. Nicol\`o, H. Nishiguchi, Y. Nishimura, W. Ootani, M. Panareo, A. Papa, R. Pazzi, G. Piredda, A. Popov, F. Renga, S. Ritt, M. Rossella, R. Sawada, M. Schneebeli, F. Sergiampietri, G. Signorelli, S. Suzuki, C. Topchyan, V. Tumakov, Y. Uchiyama, R. Valle, C. Voena, F. Xiao, S. Yamada, A. Yamamoto, S. Yamashita, Yu. V. Yudin, D. Zanello
Title:	A limit for the mu -> e gamma decay from the MEG experiment
Conference:
Location and Date of Conference:
Journal:	Nuclear Physics B
Volume:	834
Page:	1-12
Year:	2010
Year of proceedings:
Link:	http://dx.doi.org/10.1016/j.nuclphysb.2010.03.030

A search for the decay mu -> e gamma, performed at PSI and

based on data from the initial three months of operation of the MEG

experiment, yields an upper limit

BR(mu -> e gamma) < 2.8 x 10**-11 (90% C.L.).

Positrons and photons from ~ 10**14 stopped mu-decays

were measured by a superconducting positron spectrometer and a

900 litre liquid xenon photon detector.