A MEASUREMENT OF TAU POLARIZATION IN Z0 DECAYS

被引：35

作者：

ADRIANI, O

AGUILARBENITEZ, M

AHLEN, S

AKBARI, H

ALCARAZ, J

ALOISIO, A

ALVERSON, G

ALVIGGI, MG

AMBROSI, G

AN, Q

ANDERHUB, H

ANDERSON, AL

ANDREEV, VP

ANGELOV, T

ANTONOV, L

ANTREASYAN, D

ARCE, P

AREFIEV, A

ATAMANCHUK, A

AZEMOON, T

AZIZ, T

BABA, PVKS

BAGNAIA, P

BAKKEN, JA

BAKSAY, L

BALL, RC

BANERJEE, S

BAO, J

BARILLERE, R

BARONE, L

BASCHIROTTO, A

BATTISTON, R

BAY, A

BECATTINI, F

BECKER, U

BEHNER, F

BEHRENS, J

BEINGESSNER, S

BENCZE, GL

BERDUGO, J

BERGES, P

BERTUCCI, B

BETEV, BL

BIASINI, M

BILAND, A

BILEI, GM

BIZZARRI, R

BLAISING, JJ

BLUMENFELD, B

BOBBINK, GJ

机构：

[1] UNIV FLORENCE, I-50125 FLORENCE, ITALY

[2] CTR INVEST ENERGET MEDIOAMBIENTALES & TECHNOL, E-28040 MADRID, SPAIN

[3] BOSTON UNIV, BOSTON, MA 02215 USA

[4] JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA

[5] CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND

[6] INFN, SEZ NAPOLI, I-80125 NAPLES, ITALY

[7] NAPLES UNIV, I-80125 NAPLES, ITALY

[8] NORTHEASTERN UNIV, BOSTON, MA 02115 USA

[9] INFN, SEZ PERUGIA, I-06100 PERUGIA, ITALY

[10] UNIV PERUGIA, I-06100 PERUGIA, ITALY

[11] WORLD LAB, FBLJA PROJECT, CH-1211 GENEVA 23, SWITZERLAND

[12] SWISS FED INST TECHNOL, EIDGENOSS TECH HSCH, CH-8093 ZURICH, SWITZERLAND

[13] MIT, CAMBRIDGE, MA 02139 USA

[14] NUCL PHYS INST, ST PETERSBURG, USSR

[15] BULGARIAN ACAD SCI, INST MECHATRON, BU-1113 SOFIA, BULGARIA

[16] INFN, SEZ BOLOGNA, I-40126 BOLOGNA, ITALY

[17] ITEP, MOSCOW 117259, USSR

[18] UNIV MICHIGAN, ANN ARBOR, MI 48109 USA

[19] TATA INST FUNDAMENTAL RES, BOMBAY 400005, INDIA

[20] RHEIN WESTFAL TH AACHEN, INST PHYS 1, W-5100 AACHEN, GERMANY

[21] RHEIN WESTFAL TH AACHEN, INST PHYS 3, W-5100 AACHEN, GERMANY

[22] INFN, SEZ ROMA, I-00185 ROME, ITALY

[23] UNIV ROME LA SAPIENZA, I-00185 ROME, ITALY

[24] PRINCETON UNIV, PRINCETON, NJ 08544 USA

[25] UNIV ALABAMA, TUSCALOOSA, AL 35486 USA

[26] INFN, SEZ MILANO, I-20133 MILAN, ITALY

[27] UNIV GENEVA, CH-1211 GENEVA 4, SWITZERLAND

[28] LAPP, CNRS, IN2P3, F-74941 ANNECY LE VIEUX, FRANCE

[29] HUNGARIAN ACAD SCI, CENT RES INST PHYS, H-1525 BUDAPEST 114, HUNGARY

[30] NIKHEF, NATL INST HIGH ENERGY PHYS, 1009 DB AMSTERDAM, NETHERLANDS

[31] CATHOLIC UNIV NIJMEGEN, 6525 ED NIJMEGEN, NETHERLANDS

[32] NIKHEF NIJMEGEN, 6525 ED NIJMEGEN, NETHERLANDS

[33] UNIV CALIF, SAN DIEGO, CA 92182 USA

[34] CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA

[35] LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA

[36] UNIV LYON 1, CNRS, IN2P3, F-69622 VILLEURBANNE, FRANCE

[37] PURDUE UNIV, W LAFAYETTE, IN 47907 USA

[38] LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA

[39] IHEP, BEIJING, PEOPLES R CHINA

[40] USTC, ANHUI 230029, PEOPLES R CHINA

[41] KOREA ADV INST SCI & TECHNOL, CTR HIGH ENERGY PHYS, TAEJON 305701, SOUTH KOREA

[42] OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA

[43] UNIV SANTIAGO, DEPT FIS PARTICULAS ELEMENTALES, E-15706 SANTIAGO, SPAIN

[44] PAUL SCHERRER INST, CH-5232 VILLIGEN, SWITZERLAND

[45] SIC, SHANGHAI, PEOPLES R CHINA

[46] DESY, INST HOCHENERGIEPHYS, O-1615 ZEUTHEN, GERMANY

[47] UNIV LAUSANNE, CH-1015 LAUSANNE, SWITZERLAND

[48] CALTECH, PASADENA, CA 91125 USA

[49] HARVARD UNIV, CAMBRIDGE, MA 02139 USA

[50] UNIV CYPRUS, DEPT NAT SCI, NICOSIA, CYPRUS

来源：

PHYSICS LETTERS B | 1992年 / 294卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(92)91549-O

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The polarization of tau leptons produced in e+e- --> tau+tau- (gamma) is measured using a sample of 8977 tau+tau- pairs collected near the peak of the Z0 resonance. A polarization of -0.132 +/- 0.026 (stat.) +/- 0.021 (syst.) is determined. This corresponds to a ratio of the vector to the axial-vector coupling constants of the tau lepton to the weak neutral current of g(V)tau/g(Aeff)tau = 0.069 +/- 0.017. This leads to a value of the effective sin2theta(w) at the Z0 resonance of sin2theta(eff) = 0.2326 +/- 0.0043.

引用

页码：466 / 478

页数：13

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