A MEASUREMENT OF THE TAU LIFETIME

被引：17

作者：

ABREU, P

ADAM, W

ADYE, T

AGASI, E

ALEKSAN, R

ALEKSEEV, GD

ALGERI, A

ALLEN, P

ALMEHED, S

ALVSVAAG, SJ

AMALDI, U

ANASSONTZIS, EG

ANDREAZZA, A

ANTILOGUS, P

APEL, WD

APSIMON, RJ

ARNOUD, Y

ASMAN, B

AUGUSTIN, JE

AUGUSTINUS, A

BAILLON, P

BAMBADE, P

BARAO, F

BARATE, R

BARBIELLINI, G

BARDIN, DY

BARKER, GJ

BARONCELLI, A

BARRING, O

BARRIO, JA

BARTL, W

BATES, MJ

BATTAGLIA, M

BAUBILLIER, M

BECKS, KH

BEESTON, CJ

BEGALLI, M

BEILLIERE, P

BELOKOPYTOV, Y

BELTRAN, P

BENEDIC, D

BENVENUTI, AC

BERGGREN, M

BERTRAND, D

BIANCHI, F

BILENKY, MS

BILLOIR, P

BJARNE, J

BLOCH, D

BLYTH, S

机构：

[1] UNIV PARIS 07, F-75252 PARIS 5, FRANCE

[2] INFN, I-00173 ROME, ITALY

[3] UNIV BOLOGNA, DIPARTIMENTO FIS, I-40126 BOLOGNA, ITALY

[4] UNIV INSTELLING ANTWERP, DEPT PHYS, B-2610 Antwerp, BELGIUM

[5] UNIV LJUBLJANA, DEPT PHYS, YU-61000 LJUBLJANA, SLOVENIA

[6] UNIV ETAT MONS, FAC SCI, B-7000 MONS, BELGIUM

[7] INFN, I-16146 GENOA, ITALY

[8] UNIV UPPSALA, DEPT RADIAT SCI, S-75121 UPPSALA, SWEDEN

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

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

[11] UNIV WARSAW, PL-00681 WARSAW, POLAND

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

[13] NIKHEF H, 1009 DB AMSTERDAM, NETHERLANDS

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

[15] JOINT INST NUCL RES, MOSCOW 101000, RUSSIA

[16] VALENCIA CSIC, IFIC, E-46100 BURJASSOT, SPAIN

[17] UNIV VALENCIA, DFAMN, E-46100 BURJASSOT, SPAIN

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

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

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

[21] INFN, I-20133 MILAN, ITALY

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

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

[24] UNIV GRENOBLE 1, INST SCI NUCL, F-38026 GRENOBLE, FRANCE

[25] INFN, I-34127 TRIESTE, ITALY

[26] UNIV OXFORD, NUCL PHYS LAB, OXFORD OX1 3RH, ENGLAND

[27] IST NAZL FIS NUCL, IST SUPER SANITA, I-00161 ROME, ITALY

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

[29] AUSTRIAN ACAD SCI, INST HOCHENERGIEPHYS, A-1050 VIENNA, AUSTRIA

[30] UNIV PARIS VI, LPNHE, F-75252 PARIS 05, FRANCE

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

[32] PROTVINO HIGH ENERGY PHYS INST, PROTVINO 142284, RUSSIA

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

[34] ULP, CTR RECH NUCL, IN2P3, CNRS, F-67037 STRASBOURG, FRANCE

[35] INFN, I-40126 BOLOGNA, ITALY

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

[37] UNIV TURIN, DIPARTIMENTO FIS SPERIMENTALE, I-10125 TURIN, ITALY

[38] INFN, I-10125 TURIN, ITALY

[39] UNIV ROME 2, DIPARTIMENTO FIS, I-00173 ROME, ITALY

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

[41] INFN, I-35131 PADUA, ITALY

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

[43] UNIV SANTANDER, FAC CIENCIAS, E-39005 SANTANDER, SPAIN

[44] NIELS BOHR INST, DK-2100 COPENHAGEN 0, DENMARK

[45] INST NUCL STUDIES, PL-00681 WARSAW, POLAND

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

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

[48] INST NUCL PHYS, HIGH ENERGY PHYS LAB, PL-30055 KRAKOW 30, POLAND

[49] CHARLES UNIV, NUCL CTR MFF, CS-18000 PRAGUE 8, CZECHOSLOVAKIA

[50] UNIV UDINE, IST FIS, I-33100 UDINE, ITALY

来源：

PHYSICS LETTERS B | 1993年 / 302卷 / 2-3期

关键词：

D O I：

10.1016/0370-2693(93)90409-B

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The tau lepton lifetime is measured using four different methods with the DELPHI detector. Three measurements using one prong decays are combined, accounting for correlations, resulting in tau(tau) = 298 +/- 7 (stat.) +/- 4 (syst.) fs while the decay length distribution of three prong decays gives tau(tau) = 298 +/- 13 (stat.) +/- 5 (syst.) fs. The combined result is tau(tau) = 298 +/- 7 fs. The ratio of the Fermi coupling constant from tau decay relative to that from muon decay is found to be 0.985 +/- 0.013, compatible with lepton universality.

引用

页码：356 / 368

页数：13

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