A limit for the μ → eγ decay from the MEG experiment

被引：87

作者：

Adam, J. ^{[14
,15
]}

Bai, X. ^{[11
]}

Baldini, A. ^{[1
]}

Baracchini, E. ^{[12
]}

Barchiesi, A. ^{[7
,8
]}

Bemporad, C. ^{[1
,2
]}

Boca, G. ^{[6
]}

Cattaneo, P. W. ^{[5
]}

Cavoto, G. ^{[7
]}

Cecchet, G. ^{[5
]}

Cei, F. ^{[1
,2
]}

Cerri, C. ^{[1
]}

De Bari, A. ^{[5
]}

De Gerone, M. ^{[3
,4
]}

Doke, T. ^{[16
]}

Dussoni, S. ^{[3
,4
]}

Egger, J. ^{[12
,14
]}

Galli, L. ^{[1
,2
,14
]}

Gallucci, G. ^{[1
,2
,14
]}

Gatti, F. ^{[3
,4
]}

Golden, B. ^{[12
]}

Grassi, M. ^{[1
]}

Grigoriev, D. N. ^{[17
]}

Haruyama, T. ^{[13
]}

Hildebrandt, M. ^{[14
]}

Hisamatsu, Y. ^{[11
,14
]}

Ignatov, F. ^{[17
]}

Iwamoto, T. ^{[11
]}

Kaneko, D. ^{[11
]}

Kettle, P. -R. ^{[14
]}

Khazin, B. I. ^{[17
]}

Kiselev, O. ^{[14
]}

Korenchenko, A. ^{[18
]}

Kravchuk, N. ^{[18
]}

Maki, A. ^{[13
]}

Mihara, S. ^{[13
]}

Molzon, W. ^{[12
]}

Mori, T. ^{[11
]}

Mzavia, D. ^{[18
]}

Natori, H. ^{[11
,14
]}

Nardo, R. ^{[5
,6
]}

Nicolo, D. ^{[1
,2
]}

Nishiguchi, H. ^{[13
]}

Nishimura, Y. ^{[11
]}

Ootani, W. ^{[11
]}

Panareo, M. ^{[9
,10
]}

Papa, A. ^{[1
,2
]}

Pazzi, R. ^{[1
,2
]}

Piredda, G. ^{[7
]}

Popov, A. ^{[17
]}

机构：

[1] Ist Nazl Fis Nucl, Sez Piza, I-56127 Pisa, Italy

[2] Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy

[3] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy

[4] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy

[5] Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy

[6] Univ Pavia, Dipartimento Fis, I-27100 Pavia, Italy

[7] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy

[8] Univ Rome, Dipartimento Fis, I-00185 Rome, Italy

[9] Ist Nazl Fis Nucl, Sez Lecce, I-73100 Lecce, Italy

[10] Univ Lecce, Dipartimento Fis, I-73100 Lecce, Italy

[11] Univ Tokyo, ICEPP, Bunkyo Ku, Tokyo 1130033, Japan

[12] Univ Calif Irvine, Irvine, CA 92697 USA

[13] High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki 3050801, Japan

[14] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[15] ETH, Swiss Fed Inst Technol, CH-8093 Zurich, Switzerland

[16] Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan

[17] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[18] Joint Inst Nucl Res, Dubna 141980, Russia

来源：

NUCLEAR PHYSICS B | 2010年 / 834卷 / 1-2期

关键词：

Muon decay; Lepton flavour violation; LEPTON-FLAVOR VIOLATION;

D O I：

10.1016/j.nuclphysb.2010.03.030

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

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 similar to 10(14) stopped mu(+)-decays by means of a superconducting positron spectrometer and a 900 litre liquid xenon photon detector. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1 / 12

页数：12

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