A limit for the mu -> e gamma decay from the MEG experiment
High Energy Physics - Experiment
2010-04-21 v2 High Energy Physics - Phenomenology
Abstract
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 on the branching ratio of BR(mu -> e gamma) < 2.8 x 10**-11 (90% C.L.). This corresponds to the measurement of positrons and photons from ~ 10**14 stopped mu-decays by means of a superconducting positron spectrometer and a 900 litre liquid xenon photon detector.
Cite
@article{arxiv.0908.2594,
title = {A limit for the mu -> e gamma decay from the MEG experiment},
author = {MEG collaboration and J. Adam and X. Bai and A. Baldini and E. Baracchini and A. Barchiesi and C. Bemporad and G. Boca and P. W. Cattaneo and G. Cavoto and G. Cecchet and F. Cei and C. Cerri and A. De Bari and M. De Gerone and T. Doke and S. Dussoni and J. Egger and L. Galli and G. Gallucci and F. Gatti and B. Golden and M. Grassi and D. N. Grigoriev and T. Haruyama and M. Hildebrandt and Y. Hisamatsu and F. Ignatov and T. Iwamoto and D. Kaneko and P. -R. Kettle and B. I. Khazin and O. Kiselev and A. Korenchenko and N. Kravchuk and A. Maki and S. Mihara and W. Molzon and T. Mori and D. Mzavia and H. Natori and R. Nardò and D. Nicolò and H. Nishiguchi and Y. Nishimura and W. Ootani and M. Panareo and A. Papa and R. Pazzi and G. Piredda and A. Popov and F. Renga and S. Ritt and M. Rossella and R. Sawada and M. Schneebeli and F. Sergiampietri and G. Signorelli and S. Suzuki and C. Topchyan and V. Tumakov and Y. Uchiyama and R. Valle and C. Voena and F. Xiao and S. Yamada and A. Yamamoto and S. Yamashita and Yu. V. Yudin and D. Zanello},
journal= {arXiv preprint arXiv:0908.2594},
year = {2010}
}
Comments
13 pages, 9 figures. v2: improved estimate of photon reconstruction efficiency