Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2014

Идентификатор DOI: 10.1016/j.nuclphysbps.2014.02.019

Аннотация: A muon decay accompanied by a photon through the inner Bremmstrahlung process (?>e??-?, radiative muon decay) produces a time-correlated pair of positron and photon which becomes one of the main backgrounds in the search for ?>. e? decay. This channel is also an important probe of timing calibration and cross-check of whole the experiment. We identified a large sample (~ 13000) of radiative muon decays in MEG data sample. The measured branching ratio in a region of interest in the ?>. e? search is consistent with the standard model prediction. It is also the first measurement of the decay from polarized muons. The precision measurement of this mode enables us to use it as one of the normalization channels of ?>. e? decay successfully reducing its uncertainty to less than 5%. © 2014 Elsevier B.V.

Журнал: Nuclear Physics B - Proceedings Supplements

Выпуск журнала: Vol. 248-250

Номера страниц: 108-111

• Adam J. (Paul Scherrer Institut PSI, CH-5232 Villigen, Switzerland, Swiss Federal Institute of Technology ETH, CH-8093 Z?rich, Switzerland)
• Bai X. (ICEPP, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan)
• Baldini A.M. (INFN Sezione di Pisa, Largo B. Pontecorvo 3, 56127 Pisa, Italy)
• Baracchini E. (ICEPP, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, University of California, Irvine, CA 92697, United States, KEK, High Energy Accelerator Research Organization 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan)
• Bemporad C. (INFN Sezione di Pisa, Largo B. Pontecorvo 3, 56127 Pisa, Italy, Pisa, Dipartimento di Fisica dell'Universit?, Largo B. Pontecorvo 3, 56127 Pisa, Italy)
• Boca G. (INFN Sezione di Pavia, Via Bassi 6, 27100 Pavia, Italy, Pavia, Dipartimento di Fisica dell'Universit?, Via Bassi 6, 27100, Pavia, Italy)
• Cattaneo P.W. (INFN Sezione di Pavia, Via Bassi 6, 27100 Pavia, Italy)
• Cavoto G. (INFN Sezione di Roma, Piazzale A. Moro, 00185 Roma, Italy)
• Cei F. (INFN Sezione di Pisa, Largo B. Pontecorvo 3, 56127 Pisa, Italy, Pisa, Dipartimento di Fisica dell'Universit?, Largo B. Pontecorvo 3, 56127 Pisa, Italy)
• Cerri C. (INFN Sezione di Pisa, Largo B. Pontecorvo 3, 56127 Pisa, Italy)
• de Bari A. (INFN Sezione di Pavia, Via Bassi 6, 27100 Pavia, Italy, Pavia, Dipartimento di Fisica dell'Universit?, Via Bassi 6, 27100, Pavia, Italy)
• De Gerone M. (Paul Scherrer Institut PSI, CH-5232 Villigen, Switzerland, INFN Sezione di Roma, Piazzale A. Moro, 00185 Roma, Italy, INFN Sezione di Genova, Via Dodecaneso 33, 16146 Genova, Italy, INFN Sezione di Lecce, Via per Arnesano, 73100 Lecce, Ital)
• Doke T. (Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, wsShinjuku-ku, Tokyo 169-8555, Japan)
• Dussoni S. (INFN Sezione di Genova, Via Dodecaneso 33, 16146 Genova, Italy, INFN Sezione di Lecce, Via per Arnesano, 73100 Lecce, Italy)
• Egger J. (Paul Scherrer Institut PSI, CH-5232 Villigen, Switzerland)
• Fratini K. (INFN Sezione di Genova, Via Dodecaneso 33, 16146 Genova, Italy, INFN Sezione di Lecce, Via per Arnesano, 73100 Lecce, Italy)
• Fujii Y. (ICEPP, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan)
• Galli G. (Paul Scherrer Institut PSI, CH-5232 Villigen, Switzerland, INFN Sezione di Pisa, Largo B. Pontecorvo 3, 56127 Pisa, Italy, Pisa, Dipartimento di Fisica dell'Universit?, Largo B. Pontecorvo 3, 56127 Pisa, Italy)
• Gallucci L. (INFN Sezione di Pisa, Largo B. Pontecorvo 3, 56127 Pisa, Italy, Pisa, Dipartimento di Fisica dell'Universit?, Largo B. Pontecorvo 3, 56127 Pisa, Italy)
• Gatti F. (INFN Sezione di Genova, Via Dodecaneso 33, 16146 Genova, Italy, INFN Sezione di Lecce, Via per Arnesano, 73100 Lecce, Italy)
• Golden B. (University of California, Irvine, CA 92697, United States)
• Grassi M. (INFN Sezione di Pisa, Largo B. Pontecorvo 3, 56127 Pisa, Italy)
• Grigoriev D.N. (Budker Institute of Nuclear Physics of Siberian Branch of Russian Academy of Sciences, 630090, Novosibirsk, Russian Federation)
• Haruyama T. (KEK, High Energy Accelerator Research Organization 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan)
• Hildebrandt M. (Paul Scherrer Institut PSI, CH-5232 Villigen, Switzerland)
• Hisamatsu Y. (ICEPP, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan)
• Ignatov F. (Budker Institute of Nuclear Physics of Siberian Branch of Russian Academy of Sciences, 630090, Novosibirsk, Russian Federation)
• Iwamoto T. (ICEPP, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan)
• Kettle P.-R. (Paul Scherrer Institut PSI, CH-5232 Villigen, Switzerland)
• Khazin B.I. (Budker Institute of Nuclear Physics of Siberian Branch of Russian Academy of Sciences, 630090, Novosibirsk, Russian Federation)
• Kiselev O. (Paul Scherrer Institut PSI, CH-5232 Villigen, Switzerland)
• Korenchenko A. (Joint Institute for Nuclear Research, 141980, Dubna, Russian Federation)
• Kravchuk N. (Joint Institute for Nuclear Research, 141980, Dubna, Russian Federation)
• Maki A. (KEK, High Energy Accelerator Research Organization 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan)
• Mihara S. (KEK, High Energy Accelerator Research Organization 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan)
• Molzon W. (University of California, Irvine, CA 92697, United States)
• Mori T. (ICEPP, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan)
• Mzavia D. (Joint Institute for Nuclear Research, 141980, Dubna, Russian Federation)
• Natori H. (ICEPP, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, KEK, High Energy Accelerator Research Organization 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan)
• Nishiguchi H. (KEK, High Energy Accelerator Research Organization 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan)
• Nishimura Y. (ICEPP, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan)
• Ootani W. (ICEPP, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan)
• Panareo M. (INFN Sezione di Lecce, Via per Arnesano, 73100 Lecce, Italy, Lecce, Dipartimento di Fisica dell'Universit?, Via per Arnesano, 73100 Lecce, Italy)
• Papa A. (Paul Scherrer Institut PSI, CH-5232 Villigen, Switzerland, INFN Sezione di Pisa, Largo B. Pontecorvo 3, 56127 Pisa, Italy, Pisa, Dipartimento di Fisica dell'Universit?, Largo B. Pontecorvo 3, 56127 Pisa, Italy)
• Pazzi R. (INFN Sezione di Pisa, Largo B. Pontecorvo 3, 56127 Pisa, Italy, Pisa, Dipartimento di Fisica dell'Universit?, Largo B. Pontecorvo 3, 56127 Pisa, Italy)
• Piredda G. (INFN Sezione di Roma, Piazzale A. Moro, 00185 Roma, Italy)
• Popov A. (Budker Institute of Nuclear Physics of Siberian Branch of Russian Academy of Sciences, 630090, Novosibirsk, Russian Federation)
• Renga F. (Paul Scherrer Institut PSI, CH-5232 Villigen, Switzerland, INFN Sezione di Roma, Piazzale A. Moro, 00185 Roma, Italy)
• Ritt S. (Paul Scherrer Institut PSI, CH-5232 Villigen, Switzerland)
• Rossella M. (INFN Sezione di Pavia, Via Bassi 6, 27100 Pavia, Italy)
• Sawada R. (ICEPP, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan)
• Sergiampietri F. (INFN Sezione di Pisa, Largo B. Pontecorvo 3, 56127 Pisa, Italy)
• Signorelli G. (INFN Sezione di Pisa, Largo B. Pontecorvo 3, 56127 Pisa, Italy)
• Suzuki S. (Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, wsShinjuku-ku, Tokyo 169-8555, Japan)
• Tenchini F. (INFN Sezione di Pisa, Largo B. Pontecorvo 3, 56127 Pisa, Italy, Pisa, Dipartimento di Fisica dell'Universit?, Largo B. Pontecorvo 3, 56127 Pisa, Italy)
• Topchyan C. (University of California, Irvine, CA 92697, United States)
• Uchiyama Y. (Paul Scherrer Institut PSI, CH-5232 Villigen, Switzerland, ICEPP, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan)
• Valle R. (INFN Sezione di Genova, Via Dodecaneso 33, 16146 Genova, Italy, INFN Sezione di Lecce, Via per Arnesano, 73100 Lecce, Italy)
• Voena C. (INFN Sezione di Roma, Piazzale A. Moro, 00185 Roma, Italy)
• Xiao F. (University of California, Irvine, CA 92697, United States)
• Yamada S. (KEK, High Energy Accelerator Research Organization 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan)
• Yamamoto A. (KEK, High Energy Accelerator Research Organization 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan)
• Yamashita S. (ICEPP, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan)
• Yudin Y. (Budker Institute of Nuclear Physics of Siberian Branch of Russian Academy of Sciences, 630090, Novosibirsk, Russian Federation)
• Zanello D. (INFN Sezione di Roma, Piazzale A. Moro, 00185 Roma, Italy)
• Adam J. (Paul Scherrer Institut PSI, CH-5232 Villigen, Switzerland, Swiss Federal Institute of Technology ETH, CH-8093 Z?rich, Switzerland)

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