A precise measurement of the tau lepton lifetime

被引：22

作者：

Abreu, P

Adam, W

Adye, T

Agasi, E

Ajinenko, I

Aleksan, R

Alekseev, GD

Allport, PP

Almehed, S

Alvsvaag, SJ

Amaldi, U

Amato, S

Andreazza, A

Andrieux, ML

Antilogus, P

Apel, WD

Arnoud, Y

Asman, B

Augustin, JE

Augustinus, A

Baillon, P

Bambade, P

Barao, F

Barate, R

Bardin, DY

Barker, GJ

Baroncelli, A

Barring, O

Barrio, JA

Bartl, W

Bates, MJ

Battaglia, M

Baubillier, M

Baudot, J

Becks, KH

Begalli, M

Beilliere, P

Belokopytov, Y

Benvenuti, AC

Berggren, M

Bertrand, D

Bianchi, F

Bigi, M

Bilenky, MS

Billoir, P

Bloch, D

Blume, M

Blyth, S

Bocci, V

Bolognese, T

机构：

[1] IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA

[2] IOWA STATE UNIV SCI & TECHNOL, DEPT PHYS, AMES, IA 50011 USA

[3] UNIV INSTELLING ANTWERP, DEPT PHYS, B-2610 WILRIJK, BELGIUM

[4] VUB, ULB, IIHE, B-1050 BRUSSELS, BELGIUM

[5] UNIV MONS, FAC SCI, B-7000 MONS, BELGIUM

[6] UNIV ATHENS, PHYS LAB, GR-10680 ATHENS, GREECE

[7] UNIV BERGEN, DEPT PHYS, N-5007 BERGEN, NORWAY

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

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

[10] CTR BRASILEIRO PESQUISAS FIS, BR-22290 RIO DE JANEIRO, BRAZIL

[11] PONTIFICIA UNIV CATOLICA RIO DE JANEIRO, DEPT FIS, BR-22453 RIO DE JANEIRO, BRAZIL

[12] UNIV ESTADUAL RIO DE JANEIRO, INST FIS, RIO DE JANEIRO, BRAZIL

[13] COMENIUS UNIV, FAC MATH & PHYS, BRATISLAVA 84215, SLOVAKIA

[14] COLL FRANCE, PHYS CORPUSCULAIRE LAB, IN2P3, CNRS, F-75231 PARIS 05, FRANCE

[15] CERN, CH-1211 GENEVA, SWITZERLAND

[16] UNIV STRASBOURG 1, CNRS, IN2P3, CTR RECH NUCL, F-67037 STRASBOURG, FRANCE

[17] NCSR DEMOKRITOS, INST PHYS NUCL, GR-15310 ATHENS, GREECE

[18] FZU, CAS, INST PHYS, DIV HIGH ENERGY PHYS, CR-18040 PRAGUE 8, CZECH REPUBLIC

[19] UNIV GENOA, DIPARTIMENTO FIS, I-16146 GENOA, ITALY

[20] IST NAZL FIS NUCL, I-16146 GENOA, ITALY

[21] UNIV GRENOBLE 1, IN2P3, CNRS, INST NUCL SCI, F-38026 GRENOBLE, FRANCE

[22] SEFT, RES INST HIGH ENERGY PHYS, SF-00014 HELSINKI, FINLAND

[23] JOINT INST NUCL RES, DUBNA 101000, RUSSIA

[24] UNIV KARLSRUHE, INST EXPTL KERNPHYS, D-76128 KARLSRUHE, GERMANY

[25] INST NUCL PHYS, PL-30055 KRAKOW, POLAND

[26] UNIV MIN & MET KRAKOW, PL-30055 KRAKOW, POLAND

[27] UNIV PARIS 11, ACCELERATEUR LINEAIRE LAB, IN2P3, CNRS, F-91405 ORSAY, FRANCE

[28] UNIV LANCASTER, SCH PHYS & MAT, LANCASTER LA1 4YB, ENGLAND

[29] UNIV LIVERPOOL, DEPT PHYS, LIVERPOOL L69 3BX, MERSEYSIDE, ENGLAND

[30] UNIV PARIS 06, LPNHE, IN2P3, CNRS, F-75252 PARIS 05, FRANCE

[31] UNIV PARIS 07, LPNHE, IN2P3, CNRS, F-75252 PARIS 05, FRANCE

[32] LUND UNIV, DEPT PHYS, S-22363 LUND, SWEDEN

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

[34] UNIV COMPLUTENSE MADRID, E-28040 MADRID, SPAIN

[35] UNIV AIX MARSEILLE 2, CPP, IN2P3, CNRS, F-13288 MARSEILLE 09, FRANCE

[36] UNIV MILAN, DIPARTIMENTO FIS, I-20133 MILAN, ITALY

[37] IST NAZL FIS NUCL, I-20133 MILAN, ITALY

[38] NIELS BOHR INST, DK-2100 COPENHAGEN O, DENMARK

[39] CHARLES UNIV, NUCLEAR CTR MFF, CR-18000 PRAGUE 8, CZECH REPUBLIC

[40] NIKHEF H, 1009 DB AMSTERDAM, NETHERLANDS

[41] NATL TECH UNIV ATHENS, DEPT PHYS, GR-15773 ATHENS, GREECE

[42] UNIV OSLO, DEPT PHYS, N-1000 OSLO 3, NORWAY

[43] UNIV OVIEDO, DEPT FIS, E-33006 OVIEDO, SPAIN

[44] UNIV OXFORD, DEPT PHYS, OXFORD OX1 3RH, ENGLAND

[45] UNIV PADUA, DIPARTIMENTO FIS, I-35131 PADUA, ITALY

[46] IST NAZL FIS NUCL, I-35131 PADUA, ITALY

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

[48] UNIV ROMA TOR VERGATA, DIPARTIMENTO FIS, I-00173 ROME, ITALY

[49] IST NAZL FIS NUCL, I-00173 ROME, ITALY

[50] CTR ETUD SACLAY, DAPNIA, DSM, F-91191 GIF SUR YVETTE, FRANCE

来源：

PHYSICS LETTERS B | 1996年 / 365卷 / 1-4期

关键词：

D O I：

10.1016/0370-2693(95)01434-9

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 three different methods with the DELPHI detector. Two measurements of one-prong decays are combined, accounting for correlations, giving a result of tau(tau) = 291.8 +/- 3.3 (stat.) +/- 2.0(sys.) fs while the decay length distribution of three-prong decays gives the result tau(tau) = 286.7 +/- 4.9 (stat.) +/- 3.3 (sys.) fs. Combining the results presented here with previous DELPHI measurements, we get tau(tau) = 291.4 +/- 3.0 fs and find that the ratio of the coupling constant for tau decay relative to that for muon decay is 0.990 +/- 0.009, compatible with lepton universality.

引用

页码：448 / 460

页数：13

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