Measurement of the tau lepton lifetime

被引：4

作者：

Buskulic, D

Casper, D

DeBonis, I

Decamp, D

Ghez, P

Goy, C

Lees, JP

Lucotte, A

Minard, MN

Odier, P

Pietrzyk, B

Ariztizabal, F

Chmeissani, M

Crespo, JM

Efthymiopoulos, I

Fernandez, E

FernandezBosman, M

Gaitan, V

Garrido, L

Martinez, M

Orteu, S

Pacheco, A

Padilla, C

Palla, F

Pascual, A

Perlas, JA

Sanchez, F

Teubert, F

Colaleo, A

Creanza, D

dePalma, M

Farilla, A

Gelao, G

Girone, M

Iaselli, G

Maggi, G

Maggi, M

Marinelli, N

Natali, S

Nuzzo, S

Ranieri, A

Raso, G

Romano, F

Ruggieri, F

Selvaggi, G

Silvestris, L

Tempesta, P

Zito, G

Huang, X

Lin, J

机构：

[1] UNIV AUTONOMA BARCELONA, INST FIS ALTES ENERGIES, E-08193 BARCELONA, SPAIN

[2] IST NAZL FIS NUCL, DIPARTIMENTO FIS, SEZ BARI, I-70126 BARI, ITALY

[3] ACAD SINICA, INST HIGH ENERGY PHYS, BEIJING, PEOPLES R CHINA

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

[5] UNIV CLERMONT FERRAND, CNRS, IN2P3, PHYS CORPUSCULAIRE LAB, F-63177 CLERMONT FERRAND, FRANCE

[6] NIELS BOHR INST, DK-2100 COPENHAGEN, DENMARK

[7] DEMOCRITOS NUCL RES CTR, ATHENS, GREECE

[8] ECOLE POLYTECH, CNRS, IN2P3, PHYS NUCL & HAUTES ENERGIES LAB, F-91128 PALAISEAU, FRANCE

[9] UNIV EDINBURGH, DEPT PHYS, EDINBURGH EH9 3JZ, MIDLOTHIAN, SCOTLAND

[10] UNIV FLORENCE, DIPARTIMENTO FIS, IST NAZL FIS NUCL, SEZ FIRENZE, I-50125 FLORENCE, ITALY

[11] FLORIDA STATE UNIV, SUPERCOMP COMPUTAT RES INST, TALLAHASSEE, FL 32306 USA

[12] IST NAZL FIS NUCL, LAB NAZL FRASCATI, I-00044 FRASCATI, ITALY

[13] UNIV GLASGOW, DEPT PHYS & ASTRON, GLASGOW G12 8QQ, LANARK, SCOTLAND

[14] UNIV HEIDELBERG, INST HOCHENERGIEPHYS, D-69120 HEIDELBERG, GERMANY

[15] UNIV LONDON IMPERIAL COLL SCI & TECHNOL, DEPT PHYS, LONDON SW7 2BZ, ENGLAND

[16] UNIV INNSBRUCK, INST EXPTL PHYS, A-6020 INNSBRUCK, AUSTRIA

[17] UNIV LANCASTER, DEPT PHYS, LANCASTER LA1 4YB, ENGLAND

[18] UNIV MAINZ, INST PHYS, D-55099 MAINZ, GERMANY

[19] FAC SCI LUMINY, CTR PHYS PARTICULES, CNRS, IN2P3, F-13288 MARSEILLE, FRANCE

[20] MAX PLANCK INST PHYS & ASTROPHYS, WERNER HEISENBERG INST PHYS, D-80805 MUNICH, GERMANY

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

[22] UNIV PISA, IST NAZL FIS NUCL, DIPARTIMENTO FIS, SEZ PISA, I-56010 PISA, ITALY

[23] SCUOLA NORMALE SUPER PISA, I-56010 PISA, ITALY

[24] UNIV LONDON, ROYAL HOLLOWAY & BEDFORD NEW COLL, DEPT PHYS, SURREY TW20 0EX, ENGLAND

[25] RUTHERFORD APPLETON LAB, DEPT PARTICLE PHYS, DIDCOT OX11 0QX, OXON, ENGLAND

[26] CENS, CEA, DAPNIA, SERV PHYS PARTICULES, F-91191 GIF SUR YVETTE, FRANCE

[27] UNIV CALIF SANTA CRUZ, INST PARTICLE PHYS, SANTA CRUZ, CA 95064 USA

[28] UNIV SHEFFIELD, DEPT PHYS, SHEFFIELD S3 7RH, S YORKSHIRE, ENGLAND

[29] UNIV SIEGEN, FACHBEREICH PHYS, D-57068 SIEGEN, GERMANY

[30] UNIV TRIESTE, DIPARTMENTO FIS, I-34127 TRIESTE, ITALY

[31] IST NAZL FIS NUCL, SEZ TRIESTE, I-34127 TRIESTE, ITALY

[32] UNIV WASHINGTON, SEATTLE, WA 98195 USA

[33] UNIV WISCONSIN, DEPT PHYS, MADISON, WI 53706 USA

[34] UNIV TURIN, IST FIS GEN, TURIN, ITALY

[35] CNR, IST COSMOGEOFIS, I-10133 TURIN, ITALY

[36] UNIV BARCELONA, E-08208 BARCELONA, SPAIN

[37] KANGNUNG NATL UNIV, KANGNUNG, SOUTH KOREA

[38] UNIV SASSARI, IST MATEMAT & FIS, I-07100 SASSARI, ITALY

来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1996年 / 70卷 / 04期

关键词：

D O I：

10.1007/s002880050132

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The mean lifetime of the tau lepton is measured in a sample of 25700 tau pairs collected in 1992 with the ALEPH detector at LEP. A new analysis of the 1-1 topology events is introduced. In this analysis, the dependence of the impact parameter sum distribution on the daughter track momenta is taken into account, yielding improved precision compared to other impact parameter sum methods. Three other analyses of the one- and three-prong tau decays are updated with increased statistics. The measured lifetime is 293.5+/-3.1+/-1.7 fs. Including previous (1989-1991) ALEPH measurements, the combined tau lifetime is 293.7+/-2.7+/-1.6 fs.

引用

页码：549 / 559

页数：11

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