Quark and gluon jet properties in symmetric three-jet events

被引：64

作者：

Buskulic, D

Casper, D

DeBonis, I

Decamp, D

Ghez, P

Goy, C

Lees, JP

Lucotte, A

Minard, MN

Odier, P

Pietrzyk, B

Chmeissani, M

Crespo, JM

Efthymiopoulos, I

Fernandez, E

FernandezBosman, M

Garrido, L

Juste, A

Martinez, M

Orteu, S

Pacheco, A

Padilla, C

Palla, F

Pascual, A

Perlas, JA

Riu, I

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, BELLATERRA 08193, BARCELONA, SPAIN

[2] IST NAZL FIS NUCL, DIPARTIMENTO FIS, 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, PHYS CORPUSCULAIRE LAB, IN2P3, CNRS, F-63177 CLERMONT FERRAND, FRANCE

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

[7] DEMOCRITOS NUCL RES CTR, ATHENS, GREECE

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

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

[10] UNIV FLORENCE, IST NAZL FIS NUCL, DIPARTIMENTO FIS, 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 & MED, DEPT PHYS, LONDON SW7 2BZ, ENGLAND

[16] UNIV INNSBRUCK, INST PHYS EXPT, 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, IN2P3, CNRS, CTR PHYS PARTICULES, F-13288 MARSEILLE, FRANCE

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

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

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

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

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

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

[26] CEA, DAPNIA, SERV PHYS PARTICULES, CE SACLAY, 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, DIPARTIMENTO FIS, I-34127 TRIESTE, ITALY

[31] IST NAZL FIS NUCL, 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, BARCELONA 08208, SPAIN

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

来源：

PHYSICS LETTERS B | 1996年 / 384卷 / 1-4期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/0370-2693(96)00849-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Quark and gluon jets with the same energy, 24 GeV, are compared in symmetric three-jet configurations from hadronic Z decays observed by the ALEPH detector. Jets are defined using the Durham algorithm. Gluon jets are identified using an anti-tag on b jets, based on a track impact parameter method. The comparison of gluon acid mixed flavour quark jets shows that gluon jets have a softer fragmentation function, a larger angular width and a higher particle multiplicity. Evidence is presented which shows that the corresponding differences between gluon and b jets are significantly smaller. In a statistically limited comparison the multiplicity in c jets was found to be comparable with that observed for the jets of mixed quark flavour.

引用

页码：353 / 364

页数：12

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