MEASUREMENT OF THE STRONG-COUPLING CONSTANT USING TAU-DECAYS

被引：80

作者：

BUSKULIC, D

DECAMP, D

GOY, C

LEES, JP

MINARD, MN

MOURS, B

PIETRZYK, B

ALEMANY, R

ARIZTIZABAL, F

COMAS, P

CRESPO, JM

DELFINO, M

FERNANDEZ, E

FERNANDEZBOSMAN, M

GAITAN, V

GARRIDO, L

MATTISON, T

PACHECO, A

PADILLA, C

PASCUAL, A

CREANZA, D

DEPALMA, M

FARILLA, A

IASELLI, G

MAGGI, G

MAGGI, M

NATALI, S

NUZZO, S

QUATTROMINI, M

RANIERI, A

RASO, G

ROMANO, F

RUGGIERI, F

SELVAGGI, G

SILVESTRIS, L

TEMPESTA, P

ZITO, G

CHAI, Y

HU, H

HUANG, D

HUANG, X

LIN, J

WANG, T

XIE, Y

XU, D

XU, R

ZHANG, J

ZHANG, L

ZHAO, W

BAUERDICK, LAT

机构：

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

[2] UNIV BARI, DIPARTIMENTO FIS, I-70126 BARI, ITALY

[3] INFN, I-70126 BARI, ITALY

[4] CHINESE ACAD SCI, INST HIGH ENERGY PHYS, BEIJING, PEOPLES R CHINA

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

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

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

[8] DEMOKRITOS NATL CTR SCI RES, ATHENS, GREECE

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

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

[11] UNIV FLORENCE, DIPARTIMENTO FIS, INFN, I-50125 FLORENCE, ITALY

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

[13] FLORIDA STATE UNIV, DEPT PHYS, TALLAHASSEE, FL 32306 USA

[14] INFN, LAB NAZL, I-00044 FRASCATI, ITALY

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

[16] UNIV HEIDELBERG, INST HOCHENERGIEPHYS, W-6900 HEIDELBERG, GERMANY

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

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

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

[20] UNIV MAINZ, INST PHYS, W-6500 MAINZ, GERMANY

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

[22] MAX PLANCK INST PHYS & ASTROPHYS, WERNER HEISENBERG INST, W-8000 MUNICH, GERMANY

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

[24] INFN, DIPARTIMENTO FIS, I-56010 PISA, ITALY

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

[26] UNIV LONDON, ROYAL HOLLOWAY & BEDFORD NEW COLL, DEPT PHYS, SURREY TW2 0EX, ENGLAND

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

[28] CTR ETUD SACLAY, DAPNIA, SERV PHYS PARTICULES, F-91191 GIF SUR YVETTE, FRANCE

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

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

[31] UNIV SIEGEN, FACHBEREICH PHYS, W-5900 SIEGEN, GERMANY

[32] UNIV TRIESTE, DIPARTIMENTO FIS, I-34127 TRIESTE, ITALY

[33] INFN, I-34127 TRIESTE, ITALY

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

[35] UNIV WASHINGTON, SEATTLE, WA 98195 USA

[36] UNIV TURIN, IST FIS GEN, I-10124 TURIN, ITALY

[37] CNR, IST COSMO GEOFIS, TURIN, ITALY

[38] LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA

[39] CERN, DIV PPE, CH-1211 GENEVA 23, SWITZERLAND

来源：

PHYSICS LETTERS B | 1993年 / 307卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0370-2693(93)90212-Z

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The strong coupling constant is determined from the leptonic branching ratios, the lifetime, and the invariant mass distribution of the hadronic final state of the tau lepton, using data accumulated at LEP with the ALEPH detector. The strong coupling constant measurement, alpha(s), (m(tau)2) = 0.330 +/-0.046, evolved to the Z mass, yields alpha(s)(M(Z)2) = 0. 1 18 +/- 0.005. The error includes experimental and theoretical uncertainties, the latter evaluated in the framework of the Shifman, Vainshtein and Zakharov (SVZ) approach. The method allows the non-perturbative contribution to the hadronic decay rate to be determined to be 0.3 +/- 0.5% .

引用

页码：209 / 220

页数：12

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