MEASUREMENT OF ALPHA-S IN HADRONIC Z-DECAYS USING ALL-ORDERS RESUMMED PREDICTIONS

被引：71

作者：

DECAMP, D

DESCHIZEAUX, B

GOY, C

LEES, JP

MINARD, MN

ALEMANY, R

ARIZTIZABAL, F

COMAS, P

CRESPO, JM

DELFINO, M

FERNANDEZ, E

GAITAN, V

GARRIDO, L

MIR, LM

PACHECO, A

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

GAO, Y

HU, H

HUANG, D

HUANG, X

LIN, J

LOU, J

QIAO, C

WANG, T

XIE, Y

XU, D

XU, R

ZHANG, J

ZHAO, W

ATWOOD, WB

BAUERDICK, LAT

BLUCHER, E

BONVICINI, G

机构：

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

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

[3] UNIV FLORENCE,INFN,SEZ FIRENZE,DIPARTIMENTO FIS,I-50125 FLORENCE,ITALY

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

[5] UNIV GLASGOW,GLASGOW G12 8QQ,SCOTLAND

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

[7] UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706

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

[9] SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY

[10] UNIV LONDON,ROYAL HOLLOWAY & BEDFORD NEW COLL,EGHAM TW20 0EX,SURREY,ENGLAND

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

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

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

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

[15] UNIV INNSBRUCK,INST DAIRY RES,A-6020 INNSBRUCK,AUSTRIA

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

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

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

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

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

[21] INFN,I-70126 BARI,ITALY

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

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

[24] UNIV CLERMONT FERRAND,CNRS,IN2P3,PHYS CORPUSC LAB,F-63177 CLERMONT FERRAND,FRANCE

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

[26] DEMOCRITOS NUCL RES CTR,ATHENS,GREECE

[27] CENS,DEPT PHYS PARTICULES ELEMENTAIRES,F-91191 GIF SUR YVETTE,FRANCE

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

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

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

[31] UNIV PISA,INFN,DIPARTIMENTO PHYS,I-56100 PISA,ITALY

[32] MAX PLANCK INST PHYS & ASTROPHYS,WERNER HEISENBERG,INST PHYS,W-8000 MUNICH 40,GERMANY

来源：

PHYSICS LETTERS B | 1992年 / 284卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(92)91942-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using 109 000 hadronic events obtained with the ALEPH detector at LEP at energies close to the Z resonance peak, the strong coupling constant alpha(s) (M(Z)2) is determined from an analysis of the global event shape variables thrust, heavy jet mass and the differential two-jet rate based on the k(T)-clustering scheme. The analysis uses improved theoretical predictions in which leading and next-to-leading logarithms, resummed to all orders, supplement second order expressions. After combining the results from all variables, alpha(s) (M(Z)2) is measured to be 0. 12 5 +/- 0.005, where the error is the quadratic sum of experimental and theoretical uncertainties, and is dominated by the latter.

引用

页码：163 / 176

页数：14

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