Measurement of the weak dipole moments of the τ lepton

被引：23

作者：

Acciarri, M

Adriani, O

Aguilar-Benitez, M

Ahlen, S

Alcaraz, J

Alemanni, G

Allaby, J

Aloisio, A

Alviggi, MG

Ambrosi, G

Anderhub, H

Andreev, VP

Angelescu, T

Anselmo, F

Arefiev, A

Azemoon, T

Aziz, T

Bagnaia, P

Baksay, L

Ball, RC

Banerjee, S

Banicz, K

Barczyk, A

Barillere, R

Barone, L

Bartalini, P

Baschirotto, A

Basile, M

Battiston, R

Bay, A

Becattini, F

Becker, U

Behner, F

Berdugo, J

Berges, P

Bertucci, B

Betev, BL

Bhattacharya, S

Biasini, M

Biland, A

Bilei, GM

Blaising, JJ

Blyth, SC

Bobbink, GJ

Bock, R

Bohm, A

Boldizsar, L

Borgia, B

Bourilkov, D

机构：

[1] Ist Nazl Fis Nucl, Sezione Milano, I-20133 Milan, Italy

[2] Chinese Univ Sci & Technol, USTC, Hefei 230029, Anhui, Peoples R China

[3] Res Inst High Energy Phys, SEFT, SF-00014 Helsinki, Finland

[4] Univ Lausanne, CH-1015 Lausanne, Switzerland

[5] Ist Nazl Fis Nucl, Sezione Lecce, I-73100 Lecce, Italy

[6] Univ Lecce, I-73100 Lecce, Italy

[7] Los Alamos Natl Lab, Los Alamos, NM 87544 USA

[8] Univ Lyon 1, Inst Phys Nucl Lyon, IN2P3, CNRS, F-69622 Villeurbanne, France

[9] CIEMAT, Ctr Invest Energet Medioambientales & Tecnolog, E-28040 Madrid, Spain

[10] ITEP, Inst Theoret & Expt Phys, Moscow, Russia

[11] Ist Nazl Fis Nucl, Sezione Napoli, I-80125 Naples, Italy

[12] Univ Naples Federico II, I-80125 Naples, Italy

[13] Univ Cyprus, Dept Nat Sci, Nicosia, Cyprus

[14] Catholic Univ Nijmegen, NL-6525 ED Nijmegen, Netherlands

[15] Natl Inst Nucl Phys & High Energy Phys, NL-6525 ED Nijmegen, Netherlands

[16] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[17] CALTECH, Pasadena, CA 91125 USA

[18] Ist Nazl Fis Nucl, Sezione Perugia, I-06100 Perugia, Italy

[19] Univ Perugia, I-06100 Perugia, Italy

[20] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[21] Princeton Univ, Princeton, NJ 08544 USA

[22] Ist Nazl Fis Nucl, Sezione Rome, I-00185 Rome, Italy

[23] Univ Roma La Sapienza, I-00185 Rome, Italy

[24] Russian Acad Sci, Inst Nucl Phys, St Petersburg, Russia

[25] Univ Salerno, I-84100 Salerno, Italy

[26] INFN, I-84100 Salerno, Italy

[27] Univ Calif San Diego, La Jolla, CA 92093 USA

[28] Univ Santiago, Dept Fis Particulas Elementales, E-15706 Santiago, Spain

[29] Bulgarian Acad Sci, Cent Lab Mechatron & Instrumentat, BU-1113 Sofia, Bulgaria

[30] Korea Adv Inst Sci & Technol, Ctr High Energy Phys, Taejon 305701, South Korea

[31] Univ Alabama, University, AL 35486 USA

[32] Univ Utrecht, NL-3584 CB Utrecht, Netherlands

[33] NIKHEF, NL-3584 CB Utrecht, Netherlands

[34] Purdue Univ, W Lafayette, IN 47907 USA

[35] Paul Scherrer Inst, PSI, CH-5232 Villigen, Switzerland

[36] DESY, Inst Hochenergiephys, D-15738 Zeuthen, Germany

[37] Swiss Fed Inst Technol, Eidgenoss TH, CH-8093 Zurich, Switzerland

[38] Univ Hamburg, D-22761 Hamburg, Germany

[39] Natl Cent Univ, Chungli 32054, Taiwan

[40] Natl Tsing Hua Univ, Dept Phys, Hsinchu, Taiwan

[41] Rhein Westfal TH Aachen, Inst Phys 1, D-52056 Aachen, Germany

[42] Rhein Westfal TH Aachen, Inst Phys 3, D-52056 Aachen, Germany

[43] NIKHEF, Natl Inst High Energy Phys, NL-1009 DB Amsterdam, Netherlands

[44] Univ Amsterdam, NL-1009 DB Amsterdam, Netherlands

[45] Univ Michigan, Ann Arbor, MI 48109 USA

[46] IN2P3, Lab Annecy Le Vieux Phys Particules, LAPP, CNRS, F-74941 Annecy Le Vieux, France

[47] Johns Hopkins Univ, Baltimore, MD 21218 USA

[48] Univ Basel, Inst Phys, CH-4056 Basel, Switzerland

[49] Inst High Energy Phys, IHEP, Beijing 100039, Peoples R China

[50] Humboldt Univ, D-10099 Berlin, Germany

来源：

PHYSICS LETTERS B | 1998年 / 426卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(98)00290-1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using the data collected by the L3 experiment at LEP from 1991 to 1995 at energies around the Z mass, a measurement of the weak anomalous magnetic dipole moment, a(tau)(w), and of the weak electric dipole moment, d(tau)(w), of the tau lepton is performed. These quantities are obtained from angular distributions in e(+)e(-)--> tau(+)tau(-)--> h(+)<(nu)over bar>(tau)h(-)nu(tau), where h is a pi or a rho. The results are: Re(a(tau)(w)) = (0.0 +/- 1.6 +/- 2.3) X 10(-3), Im(a(tau)(w)) = (-1.0 +/- 3.6 +/- 4.3) X 10(-3) and Re(d(tau)(w)) = (-0.44 +/- 0.88 +/- 1.33)X 10(-17)e.cm. This is the first direct measurement of a(tau)(w). (C) 1998 Elsevier Science B,V. All rights reserved.

引用

页码：207 / 216

页数：10

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