MEASUREMENT OF THE TAU LEPTON LIFETIME

被引：19

作者：

ACTON, PD

ALEXANDER, G

ALLISON, J

ALLPORT, PP

ANDERSON, KJ

ARCELLI, S

ASHTON, P

ASTBURY, A

AXEN, D

AZUELOS, G

BAHAN, GA

BAINES, JTM

BALL, AH

BANKS, J

BARKER, GJ

BARLOW, RJ

BATLEY, JR

BEAUDOIN, G

BECK, A

BECKER, J

BEHNKE, T

BELL, KW

BELLA, G

BERLICH, P

BETHKE, S

BIEBEL, O

BINDER, U

BLOODWORTH, IJ

BOCK, P

BODEN, B

BOSCH, HM

BOUGEROLLE, S

BRABSON, BB

BREUKER, H

BROWN, RM

BRUN, R

BUIJS, A

BURCKHART, HJ

CAPILUPPI, P

CARNEGIE, RK

CARTER, AA

CARTER, JR

CHANG, CY

CHARLTON, DG

CLARKE, PEL

COHEN, I

COLLINS, WJ

CONBOY, JE

COOPER, M

COUCH, M

机构：

[1] TEL AVIV UNIV,DEPT PHYS & ASTRON,IL-69978 TEL AVIV,ISRAEL

[2] UNIV MANCHESTER,SCHUSTER LAB,DEPT PHYS,MANCHESTER M13 9PL,LANCS,ENGLAND

[3] UNIV CAMBRIDGE,CAVENDISH LAB,CAMBRIDGE CB3 0HE,ENGLAND

[4] UNIV CHICAGO,ENRICO FERMI INST,CHICAGO,IL 60637

[5] UNIV CHICAGO,DEPT PHYS,CHICAGO,IL 60637

[6] UNIV BOLOGNA,DIPARTMENTO FIS,I-40126 BOLOGNA,ITALY

[7] IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY

[8] UNIV MONTREAL,PHYS NUCL LAB,MONTREAL H3C 3J7,QUEBEC,CANADA

[9] UNIV MARYLAND,DEPT PHYS & ASTRON,COLLEGE PK,MD 20742

[10] UNIV LONDON,QUEEN MARY & WESTFIELD COLL,LONDON E1 4NS,ENGLAND

[11] UNIV FREIBURG,FAK PHYS,W-7800 FREIBURG,GERMANY

[12] UNIV HAMBURG,DESY 2,INST EXPTL PHYS,W-2000 HAMBURG 52,GERMANY

[13] RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND

[14] UNIV TOKYO,DEPT PHYS,TOKYO 113,JAPAN

[15] KOBE UNIV,KOBE 657,JAPAN

[16] NATL RES COUNCIL CANADA,HERZBERG INST ASTROPHYS,OTTAWA K1A 0R6,ONTARIO,CANADA

[17] UNIV VICTORIA,DEPT PHYS,VICTORIA V8W 3P6,BC,CANADA

[18] TRIUMF,VANCOUVER V6T 2A3,BC,CANADA

[19] UNIV HEIDELBERG,INST PHYS,W-6900 HEIDELBERG,GERMANY

[20] UNIV BONN,INST PHYS,W-5300 BONN 1,GERMANY

[21] UNIV BIRMINGHAM,SCH PHYS & SPACE RES,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND

[22] INDIANA UNIV,DEPT PHYS,BLOOMINGTON,IN 47405

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

[24] CARLETON UNIV,DEPT PHYS,OTTAWA K1S 5B6,ONTARIO,CANADA

[25] UNIV LONDON UNIV COLL,LONDON WC1E 6BT,ENGLAND

[26] TECHNION ISRAEL INST TECHNOL,DEPT PHYS,IL-32000 HAIFA,ISRAEL

[27] BIRBECK COLL,LONDON WC1E 7HV,ENGLAND

[28] CENS,DPHPE,F-91191 GIF SUR YVETTE,FRANCE

[29] UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521

[30] CARLETON UNIV,CTR RES PARTICLE PHYS,OTTAWA K1S 5B6,ONTARIO,CANADA

[31] WEIZMANN INST SCI,DEPT NUCL PHYS,IL-76100 REHOVOT,ISRAEL

[32] UNIV TOKYO,INT CTR ELEMENTARY PARTICLE PHYS,TOKYO 113,JAPAN

[33] UNIV VICTORIA,DEPT PHYS,VICTORIA V8W 2Y2,BC,CANADA

[34] UNIV BRITISH COLUMBIA,DEPT PHYS,VANCOUVER V6T 1Z1,BC,CANADA

[35] UNIV BRITISH COLUMBIA,DEPT PHYS,VANCOUVER V6T 2A6,BC,CANADA

[36] MCGILL UNIV,DEPT HIGH ENERGY PHYS,IPP,MONTREAL H3A 2T8,QUEBEC,CANADA

来源：

PHYSICS LETTERS B | 1991年 / 273卷 / 03期

关键词：

D O I：

10.1016/0370-2693(91)91695-R

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The tau lepton lifetime has been measured using two independent techniques; an impact parameter analysis of the 1-prong decays and a decay length analysis of the 3-prong decays. Approximately 5 000 Z0 decays to tau+ tau- have been selected from the data collected with the OPAL detector at LEP during 1990. The results of the two statistically independent measurements are, respectively, tau(1) = 0.293 +/- 0.013 (stat.) +/- 0.013 (syst.) ps and tau(3) = 0.327 +/- 0.017 (stat.) +/- 0.011 (syst.) ps. After combining the statistical and systematic errors for each analysis in quadrature, the weighted average lifetime is calculated to be tau(tau) = 0.308 +/- 0.013 ps.

引用

页码：355 / 366

页数：12

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