EVIDENCE FOR THE TRIPLE-GLUON VERTEX FROM MEASUREMENTS OF THE QCD COLOR FACTORS IN Z-DECAY INTO 4 JETS

被引：35

作者：

DECAMP, D

DESCHIZEAUX, B

GOY, C

LEES, JP

MINARD, MN

ALEMANY, R

ARIZTIZABAL, F

COMASILLAS, 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] UNIV HEIDELBERG,INST HOCHENERGIEPHYS,W-6900 HEIDELBERG,GERMANY

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

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

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

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

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

[7] UNIV PISA,INFN,DIPARTIMENTO FIS,I-56010 PISA,ITALY

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

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

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

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

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

[13] UNIV FLORENCE,INFN,SE2 FIRENZE,DIPARTIMENTO FIS,I-50125 FLORENCE,ITALY

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

[15] FLORIDA STATE UNIV,DEPT PHYS,TALLAHASSEE,FL 32306

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

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

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

[19] UNIV BARI,SEZ BARI,I-70126 BARI,ITALY

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

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

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

[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,COPENHAGEN,DENMARK

[26] DEMOCRITOS NUCL RES CTR,ATHENS,GREECE

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

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

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

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

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

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

[33] 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

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

D O I：

10.1016/0370-2693(92)91941-2

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A sample of 4148 four-jet events observed in the ALEPH-detector at LEP in 1989 and 1990 is used to test the underlying gauge group of strong interactions. A fit to the ratios of the "colour factors" C(F), N(C) and T(F), which determine the differential cross sections, yields N(C)/C(F) = 2.24 +/- 0.32stat +/- 0.24syst and T(F)/C(F) = 0.58 +/- 0.17stat +/- 0.23syst. This is in agreement with the values expected from QCD: N(C)/C(F) = 2.25 and T(F)/C(F) = 0.375. The non-zero value of N(C)/C(F) constitutes direct evidence for the existence of the triple-gluon coupling and excludes any abelian gauge theory by more than five standard deviations.

引用

页码：151 / 162

页数：12

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