New Limit on the Lepton-Flavor-Violating Decay μ+ → e+γ

被引：210

作者：

Adam, J. ^{[1
,2
]}

Bai, X. ^{[3
]}

Baldini, A. M. ^{[4
]}

Baracchini, E. ^{[6
]}

Bemporad, C. ^{[4
,5
]}

Boca, G. ^{[7
,8
]}

Cattaneo, P. W. ^{[7
]}

Cavoto, G. ^{[9
]}

Cei, F. ^{[4
,5
]}

Cerri, C. ^{[4
]}

de Bari, A. ^{[7
,8
]}

De Gerone, M. ^{[10
,11
]}

Doke, T. ^{[12
]}

Dussoni, S. ^{[10
,11
]}

Egger, J. ^{[1
]}

Fratini, K. ^{[10
,11
]}

Fujii, Y. ^{[3
]}

Galli, L. ^{[4
,5
]}

Gallucci, G. ^{[4
,5
]}

Gatti, F. ^{[10
,11
]}

Golden, B. ^{[6
]}

Grassi, M. ^{[4
]}

Grigoriev, D. N. ^{[13
]}

Haruyama, T. ^{[14
]}

Hildebrandt, M. ^{[1
]}

Hisamatsu, Y. ^{[3
]}

Ignatov, F. ^{[13
]}

Iwamoto, T. ^{[3
]}

Kettle, P. -R. ^{[1
]}

Khazin, B. I. ^{[13
]}

Kiselev, O. ^{[1
]}

Korenchenko, A. ^{[15
]}

Kravchuk, N. ^{[15
]}

Maki, A. ^{[14
]}

Mihara, S. ^{[14
]}

Molzon, W. ^{[6
]}

Mori, T. ^{[3
]}

Mzavia, D. ^{[15
]}

Natori, H. ^{[1
,3
]}

Nicolo, D. ^{[4
,5
]}

Nishiguchi, H. ^{[14
]}

Nishimura, Y. ^{[3
]}

Ootani, W. ^{[3
]}

Panareo, M. ^{[16
,17
]}

Papa, A. ^{[1
]}

Pazzi, R. ^{[4
,5
]}

Piredda, G. ^{[9
]}

Popov, A. ^{[13
]}

Renga, F. ^{[1
,9
]}

Ritt, S. ^{[1
]}

机构：

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

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

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

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

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

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

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

[8] Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy

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

[10] Ist Nazl Fis Nucl, Sez Genovaa, I-16146 Genoa, Italy

[11] Univ Genoa, Dipartimento Fisicab, I-16146 Genoa, Italy

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

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

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

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

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

[17] Univ Lecce, Dipartimento Fisicab, I-73100 Lecce, Italy

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.107.171801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a new result based on an analysis of the data collected by the MEG detector at the Paul Scherrer Institut in 2009 and 2010, in search of the lepton-flavor-violating decay mu(+) -> e(+)gamma. The likelihood analysis of the combined data sample, which corresponds to a total of 1.8 x 10(14) muon decays, gives a 90% C. L. upper limit of 2.4 x 10(-12) on the branching ratio of the mu(+) -> e(+)gamma decay, constituting the most stringent limit on the existence of this decay to date.

引用

页数：5

共 19 条

[1] Calibration and monitoring of the MEG experiment by a proton beam from a Cockcroft-Walton accelerator
Adam, J.
Bai, X.
Baldini, A.
Baracchini, E.
Bemporad, C.
Boca, G.
Cattaneo, P. W.
Cavoto, G.
Cei, F.
Cerri, C.
Corbo, M.
Curalli, N.
de Bari, A.
De Gerone, M.
Doke, T.
Dussoni, S.
Egger, J.
Fratini, K.
Fujii, Y.
Galli, L.
Gallucci, G.
Gatti, F.
Golden, B.
Grassi, M.
Grigoriev, D. N.
Haruyama, T.
Hildebrandt, M.
Ignatov, F.
Iwamoto, T.
Kettle, P. -R.
Khazin, B. I.
Kiselev, O.
Korenchenko, A.
Kravchuk, N.
Maki, A.
Mihara, S.
Molzon, W.
Mori, T.
Mzavia, D.
Natori, H.
Nicolo, D.
Nishiguchi, H.
Nishimura, Y.
Ootani, W.
Panareo, M.
Papa, A.
Pazzi, R.
Piredda, G.
Popov, A.
Renga, F.
[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2011, 641 (01) : 19 - 32
[2] A limit for the μ → eγ decay from the MEG experiment
Adam, J.
Bai, X.
Baldini, A.
Baracchini, E.
Barchiesi, A.
Bemporad, C.
Boca, G.
Cattaneo, P. W.
Cavoto, G.
Cecchet, G.
Cei, F.
Cerri, C.
De Bari, A.
De Gerone, M.
Doke, T.
Dussoni, S.
Egger, J.
Galli, L.
Gallucci, G.
Gatti, F.
Golden, B.
Grassi, M.
Grigoriev, D. N.
Haruyama, T.
Hildebrandt, M.
Hisamatsu, Y.
Ignatov, F.
Iwamoto, T.
Kaneko, D.
Kettle, P. -R.
Khazin, B. I.
Kiselev, O.
Korenchenko, A.
Kravchuk, N.
Maki, A.
Mihara, S.
Molzon, W.
Mori, T.
Mzavia, D.
Natori, H.
Nardo, R.
Nicolo, D.
Nishiguchi, H.
Nishimura, Y.
Ootani, W.
Panareo, M.
Papa, A.
Pazzi, R.
Piredda, G.
Popov, A.
[J]. NUCLEAR PHYSICS B, 2010, 834 (1-2) : 1 - 12
[3] [Anonymous], POS ICHEP2010
[4] A radioactive point-source lattice for calibrating and monitoring the liquid xenon calorimeter of the MEG experiment
Baldini, A.
Bemporad, C.
Cei, F.
Dussoni, S.
Gatti, F.
Grassi, M.
Haruyama, T.
Hisamatsu, Y.
Iwamoto, T.
Mihara, S.
Mori, T.
Nicolo, D.
Nishiguchi, H.
Ootani, W.
Papa, A.
Pazzi, R.
Sawada, R.
Sergiampietri, F.
Signorelli, G.
Valle, R.
Yamada, S.
[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2006, 565 (02) : 589 - 598
[5] Baldini A., 2010, P SCI ICHEP2010, P528
[6] BALDINI A, MEG EXPT SEARCH MU E
[7] VIOLATIONS OF LEPTON FLAVOR AND CP IN SUPERSYMMETRIC UNIFIED THEORIES
BARBIERI, R
HALL, L
STRUMIA, A
[J]. NUCLEAR PHYSICS B, 1995, 445 (2-3) : 219 - 251
[8] New limit for the lepton-family-number nonconserving decay μ+ → e+γ
Brooks, ML
Chen, YK
Cooper, MD
Cooper, PS
Dzemidzic, M
Empl, A
Gagliardi, CA
Hogan, GE
Hughes, EB
Hungerford, EV
Jui, CCH
Knott, JE
Koetke, DD
Kroupa, MA
Lan, KA
Manweiler, R
Mayes, BW
Mischke, RE
Piilonen, LE
Stanislaus, TDS
Stantz, KM
Szymanski, JJ
Tribble, RE
Tu, XL
Van Ausdeln, LA
von Witsch, WH
Wright, SC
Ziock, KOH
[J]. PHYSICAL REVIEW LETTERS, 1999, 83 (08) : 1521 - 1524
[9] Alignment of the CMS silicon tracker during commissioning with cosmic rays
Chatrchyan, S.
Khachatryan, V.
Sirunyan, A. M.
Adam, W.
Arnold, B.
Bergauer, H.
Bergauer, T.
Dragicevic, M.
Eichberger, M.
Eroe, J.
Friedl, M.
Fruehwirth, R.
Ghete, V. M.
Hammer, J.
Haensel, S.
Hoch, M.
Hoermann, N.
Hrubec, J.
Jeitler, M.
Kasieczka, G.
Kastner, K.
Krammer, M.
Liko, D.
de Abril, I. Magrans
Mikulec, I.
Mittermayr, F.
Neuherz, B.
Oberegger, M.
Padrta, M.
Pernicka, M.
Rohringer, H.
Schmid, S.
Schoefbeck, R.
Schreiner, T.
Stark, R.
Steininger, H.
Strauss, J.
Taurok, A.
Teischinger, F.
Themel, T.
Uhl, D.
Wagner, P.
Waltenberger, W.
Walzel, G.
Widl, E.
Wulz, C. -E.
Chekhovsky, V.
Dvornikov, O.
Emeliantchik, I.
Litomin, A.
[J]. JOURNAL OF INSTRUMENTATION, 2010, 5
[10] The MEG timing counter calibration and performance
De Gerone, M.
Dussoni, S.
Fratini, K.
Gatti, F.
Valle, R.
Boca, G.
Cattaneo, P. W.
Rossella, M.
Nardo, R.
Papa, A.
Signorelli, G.
Cavoto, G.
Piredda, G.
Renga, F.
Voena, C.
Uchiyama, Y.
[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2011, 638 (01) : 41 - 46

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