STUDY OF PROMPT PHOTON PRODUCTION IN HADRONIC Z(0) DECAYS

被引：16

作者：

ABREU, P

ADAM, W

ADYE, T

AGASI, E

AJINENKO, L

ALEKSAN, R

ALEKSEEV, GD

ALLPORT, PP

ALMEHED, S

ALVSVAAG, SJ

AMALDI, U

AMATO, S

ANDREAZZA, A

ANDRIEUX, ML

ANTILOGUS, P

APEL, WD

ARNOUD, Y

ASMAN, B

AUGUSTIN, JE

AUGUSTINUS, A

BAILLON, P

BAMBADE, P

BARAO, F

BARATE, R

BARBIELLINI, G

BARDIN, DY

BARKER, GJ

BARONCELLI, A

BARRING, O

BARRIO, JA

BARTL, W

BATES, MJ

BATTAGLIA, M

BAUBILLIER, M

BAUDOT, J

BECKS, KH

BEGALLI, M

BEILLIERE, P

BELOKOPYTOV, Y

BENVENUTI, AC

BERGGREN, M

BERTRAND, D

BIANCHI, F

BIGI, M

BILENKY, MS

BILLOIR, P

BLOCH, D

BLUME, M

BLYTH, S

BOCCI, V

机构：

[1] IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011

[2] IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011

[3] UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM

[4] VUB,ULB,IIHE,B-1050 BRUSSELS,BELGIUM

[5] UNIV ETAT MONS,FAC SCI,B-7000 MONS,BELGIUM

[6] UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE

[7] UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY

[8] UNIV BOLOGNA,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY

[9] IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY

[10] CTR BRASILEIRO PESQUISAS FIS,BR-22290 RIO JANEIRO,BRAZIL

[11] PONTIFICIA UNIV CATOLICA RIO DE JANEIRO,DEPT FIS,BR-22453 RIO JANEIRO,BRAZIL

[12] UNIV ESTADUAL RIO DE JANEIRO,INST FIS,RIO JANEIRO,BRAZIL

[13] COMENIUS UNIV BRATISLAVA,FAC MATH & PHYS,BRATISLAVA 84215,SLOVAKIA

[14] COLL FRANCE,PHYS CORPUSCULAIRE LAB,CNRS,IN2P3,F-75231 PARIS 05,FRANCE

[15] CERN,CH-1211 GENEVA 23,SWITZERLAND

[16] CTR RECH NUCL,ULP,CNRS,IN2P3,F-67037 STRASBOURG,FRANCE

[17] NATL CTR SCI RES DEMOKRITOS,INST NUCL PHYS,GR-15310 ATHENS,GREECE

[18] CAS,DIV HIGH ENERGY PHYS,INST PHYS,FZU,CR-18040 PRAGUE 8,CZECH REPUBLIC

[19] UNIV GENOA,DIPARTIMENTO FIS,I-16146 GENOA,ITALY

[20] IST NAZL FIS NUCL,I-16146 GENOA,ITALY

[21] UNIV GRENOBLE 1,INST SCI NUCL,CNRS,IN2P3,F-38026 GRENOBLE,FRANCE

[22] SEFT,HIGH ENERGY PHYS RES INST,SF-00014 HELSINKI,FINLAND

[23] JOINT INST NUCL RES,DUBNA 101000,RUSSIA

[24] UNIV KARLSRUHE,INST EXPTL KERNPHYS,D-76128 KARLSRUHE,GERMANY

[25] INST NUCL PHYS,HIGH ENERGY PHYS LAB,PL-30055 KRAKOW 30,POLAND

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

[27] UNIV LANCASTER,SCH PHYS & MAT,LANCASTER LA1 4YB,ENGLAND

[28] UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND

[29] UNIV PARIS 06,LPNHE,CNRS,IN2P3,F-75252 PARIS 05,FRANCE

[30] UNIV PARIS 07,F-75252 PARIS 05,FRANCE

[31] LUND UNIV,DEPT PHYS,S-22363 LUND,SWEDEN

[32] UNIV LYON 1,IPNL,CNRS,IN2P3,F-69622 VILLEURBANNE,FRANCE

[33] UNIV COMPLUTENSE MADRID,E-28040 MADRID,SPAIN

[34] UNIV AIX MARSEILLE 2,CPP,CNRS,IN2P3,F-13288 MARSEILLE 09,FRANCE

[35] UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY

[36] IST NAZL FIS NUCL,I-20133 MILAN,ITALY

[37] NIELS BOHR INST,DK-2100 COPENHAGEN 0,DENMARK

[38] CHARLES UNIV,NUCL CTR MFF,NC,CR-18000 PRAGUE 8,CZECH REPUBLIC

[39] NIKHEF H,1009 DB AMSTERDAM,NETHERLANDS

[40] NATL TECH UNIV ATHENS,DEPT PHYS,GR-15773 ATHENS,GREECE

[41] UNIV OSLO,DEPT PHYS,N-1000 OSLO,NORWAY

[42] UNIV OVIEDO,DEPT FIS,E-33006 OVIEDO,SPAIN

[43] UNIV OXFORD,DEPT PHYS,OXFORD OX1 3RH,ENGLAND

[44] UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY

[45] IST NAZL FIS NUCL,I-35131 PADUA,ITALY

[46] RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND

[47] UNIV ROMA TOR VERGATA,DIPARTIMENTO FIS,I-00173 ROME,ITALY

[48] IST NAZL FIS NUCL,I-00173 ROME,ITALY

[49] CTR ETUD SACLAY,DSM,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE

[50] IST NAZL FIS NUCL,IST SUPER SANITA,I-00161 ROME,ITALY

来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1995年 / 69卷 / 01期

关键词：

D O I：

10.1007/s002880050001

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

From a sample of 1.5 million Z(0) --> <q(q)over bar> decays collected by the DELPHI detector during 1991, 1992 and 1993, the production cross section for isolated final state photons is measured and is compared with the O(alpha, alpha(s)) matrix element calculations implemented in the EEPRAD and GNJETS Monte Carlo generators. The observed photon yield is used to derive the electroweak couplings of charge 2/3 (u-type) and charge 1/3 (d-type) quarks to the Z(0) boson. The measured values C-2/3 = 0.91(-0.36)(+0.25) and c(1/3) = 1.62(-0.17)(+0.24) are compatible with the Standard Model prediction, C-2/3 = 1.145 and c(1/3) = 1.477.

引用

页码：1 / 13

页数：13

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