EXPERIMENTAL-STUDY OF THE TRIPLE-GLUON VERTEX

被引：46

作者：

Abreu, P

Adam, W

Adami, F

Adye, T

Akesson, T

Alekseev, GD

Allen, P

Almehed, S

Alted, F

Alvsvaag, SJ

Amaldi, U

Anassontzis, E

Apel, WD

Asman, B

Astier, P

Augustin, JE

Augustinus, A

Baillon, P

Bambade, P

Bara, F

Barbiellini, G

Bardin, DY

Baroncelli, A

Barring, O

Bartl, W

Bates, MJ

Baubillier, M

Becks, KH

Beeston, CJ

Begalli, M

Beilliere, P

Belokopytov, I

Beltran, P

Benedic, D

Benlloch, JM

Berggren, M

Bertrand, D

Biagi, S

Bianchi, F

Bibby, JH

Bilenky, MS

Billoir, P

Bjarne, J

Bloch, D

Bogolubov, PN

Bollini, D

Bolognese, T

Bonapart, M

Bonesini, M

Booth, PSL

机构：

[1] LIP, P-1000 Lisbon, PORTUGAL

[2] Oesterreich Akad Wissensch, Inst Hochenergiephys, A-1050 Vienna, AUSTRIA

[3] CEN Saclay, DPhPE, F-91191 Gif Sur Yvette, FRANCE

[4] Rutherford Appleton Lab, Chilton OXll OQX, Didcot, ENGLAND

[5] Univ Lund, Dept Phys, S-22363 Lund, SWEDEN

[6] Joint Inst Nucl Res, SU-101000 Moscow, RUSSIA

[7] Univ Valencia, Inst Fis Corpuscular IFIC, Ctr Mixto, CSIC, E-46100 Burjassot, Valencia, SPAIN

[8] Univ Bergen, Dept Phys, N-5007 Bergen, NORWAY

[9] CERN, CH-1211 Geneva 23, SWITZERLAND

[10] Univ Athens, Phys Lab, GR-10680 Athens, GREECE

[11] Univ Karlsruhe, Inst Expt Kernphys, W-7500 Karlsruhe 1, GERMANY

[12] Univ Stockholm, Inst Phys, S-11346 Stockholm, SWEDEN

[13] Univ Paris 06, LPNHE, F-75230 Paris 05, FRANCE

[14] Univ Paris 07, LPNHE, F-75230 Paris 05, FRANCE

[15] Univ Paris Sud, Lab Accelerateur Lineaire, F-91405 Orsay, FRANCE

[16] Univ Trieste, Dipartimento Fis, I-34127 Trieste, ITALY

[17] Ist Nazl Fis Nucl, I-34127 Trieste, ITALY

[18] Univ Udine, Ist Fis, I-33100 Udine, ITALY

[19] Ist Nazl Fis Nucl, Ist Super Sanita, I-01161 Rome, ITALY

[20] Univ Rome 2, Dipartimento Fis, I-00173 Rome, ITALY

[21] Ist Nazl Fis Nucl, I-00173 Rome, ITALY

[22] Univ Oxford, Nucl Phys Lab, Oxford OX1 3RH, ENGLAND

[23] Univ Wuppertal, Fachbereich Phys, W-5600 Wuppertal 1, GERMANY

[24] Univ Genoa, Dipartimento Fis, I-16146 Genoa, ITALY

[25] Ist Nazl Fis Nucl, I-16146 Genoa, ITALY

[26] Coll France, Lab Phys Corpusculaire, F-75231 Paris 05, FRANCE

[27] Inst High Energy Phys, SU-142 284 Protvino, Moscow Region, RUSSIA

[28] NRC Demokritos, Inst Nucl Phys, GR-15310 Athens, GREECE

[29] CRN Grp DELPHI, Div Hautes Energies, F-67037 Strasbourg, FRANCE

[30] LEPSI, F-67037 Strasbourg, FRANCE

[31] Univ Instelling Antwerp, Dept Phys, B-2610 Wilrijk, BELGIUM

[32] ULB VUB, IIHE, B-1050 Brussels, BELGIUM

[33] Univ Etat Mons, Fac Sci, Serv Phys Part Elem, B-7000 Mons, BELGIUM

[34] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, ENGLAND

[35] Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, ITALY

[36] Ist Nazl Fis Nucl, I-10125 Turin, ITALY

[37] Univ Bologna, Dipartimento Fis, I-40126 Bologna, ITALY

[38] Ist Nazl Fis Nucl, I-40126 Bologna, ITALY

[39] NIKHEF H, NL-1009 DB Amsterdam, NETHERLANDS

[40] Univ Milan, Dipartmento Fis, I-20133 Milan, ITALY

[41] Ist Nazl Fis Nucl, I-20133 Milan, ITALY

[42] Univ Uppsala, Dept Radiat Sci, S-75121 Uppsala, SWEDEN

[43] Univ Helsinki, Dept High Energy Phys, SF-00170 Helsinki 17, FINLAND

[44] Univ Oslo, Dept Phys, N-1000 Oslo 3, NORWAY

[45] Univ Santander, Fac Ciencias, E-39005 Santander, SPAIN

[46] Univ Padua, Dipartimento Fis, I-35131 Padua, ITALY

[47] Ist Nazl Fis Nucl, I-35131 Padua, ITALY

[48] Iowa State Univ, Ames Lab, Ames, IA 50011 USA

[49] Iowa State Univ, Dept Phys, Ames, IA 50011 USA

[50] Niels Bohr Inst, DK-2100 Copenhagen 0, DENMARK

来源：

PHYSICS LETTERS B | 1991年 / 255卷 / 03期

关键词：

D O I：

10.1016/0370-2693(91)90796-S

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In four-jet events from e+e- --> Z0 --> multihadrons one can separate the three principal contributions from the triple-gluon vertex, double gluon-bremsstrahlung and the secondary quark-antiquark production, using the shape of the two-dimensional angular distributions in the generalized Nachtmann-Reiter angle theta-NR* and the opening angle of the secondary jets. Thus one can identify directly the contribution from the triple-gluon vertex without comparison with a specific non-QCD model. Applying this new method to events taken with the DELPHI-detector we get for the ratio of the colour factor N(C) to the fermionic Casimir operator C(F): N(C)/C(F) = 2.55 +/- 0.55(stat.) +/- 0.4(fragm. + models) +/- 0.2(error in bias) in agreement with the value 2.25 expected in QCD from N(C) = 3 and C(F) = 4/3.

引用

页码：466 / 476

页数：11

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