DETERMINATION OF ALPHA(S) FOR B-QUARKS AT THE Z(0) RESONANCE
文献类型：期刊论文
| 作者 | ABREU, P; ADAM, W; ADYE, T; AGASI, E; ALEKSAN, R; ALEKSEEV, GD; ALGERI, A; ALLEN, P; ALMEHED, S; ALVSVAAG, SJ |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 1993 |
| 卷号 | 307期号:1-2页码:221-236 |
| 通讯作者 | IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011 ; IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011 ; UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM ; ULB,VUB,IIHE,B-1050 BRUSSELS,BELGIUM ; UNIV ETAT MONS,FAC SCI,B-7000 MONS,BELGIUM ; UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE ; UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY ; UNIV BOLOGNA,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY ; INFN,I-40126 BOLOGNA,ITALY ; COLL FRANCE,PHYS CORPUSCULAIRE LAB,IN2P3,CNRS,F-75231 PARIS 05,FRANCE ; CERN,CH-1211 GENEVA 23,SWITZERLAND ; ULP,CNRS,IN2P3,CTR RECH NUCL,F-67037 STRASBOURG,FRANCE ; NATL CTR SCI RES DEMOKRITOS,INST NUCL PHYS,GR-15310 ATHENS,GREECE ; CAS,DIV HIGH ENERGY PHYS,INST PHYS,FZU,CS-18040 PRAGUE 8,CZECHOSLOVAKIA ; UNIV GENOA,DIPARTIMENTO FIS,I-16146 GENOA,ITALY ; INFN,I-16146 GENOA,ITALY ; UNIV GRENOBLE 1,CNRS,IN2P3,INST SCI NUCL,F-38026 GRENOBLE,FRANCE ; SEFT,HIGH ENERGY PHYS RES INST,SF-00170 HELSINKI,FINLAND ; JOINT INST NUCL RES,MOSCOW 101000,RUSSIA ; UNIV KARLSRUHE,INST EXPTL KERNPHYS,W-7500 KARLSRUHE 1,GERMANY ; INST NUCL PHYS,HIGH ENERGY PHYS LAB,PL-30055 KRAKOW 30,POLAND ; CTR BRASILEIRO PESQUISAS FIS,BR-22290 RIO JANEIRO,BRAZIL ; UNIV PARIS 11,LAB ACCELERATEUR LINEAIRE,IN2P3,CNRS,F-91405 ORSAY,FRANCE ; UNIV LANCASTER,SCH PHYS & MAT,LANCASTER LA1 4YB,ENGLAND ; UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,ENGLAND ; UNIV PARIS 06,CNRS,IN2P3,LPNHE,F-75252 PARIS 05,FRANCE ; UNIV PARIS 07,F-75252 PARIS 05,FRANCE ; LUND UNIV,DEPT PHYS,S-22363 LUND,SWEDEN ; UNIV LYON 1,IPNL,IN2P3,CNRS,F-69622 VILLEURBANNE,FRANCE ; UNIV COMPLUTENSE MADRID,E-28040 MADRID,SPAIN ; UNIV AIX MARSEILLE 2,CPP,IN2P3,CNRS,F-13288 MARSEILLE 09,FRANCE ; UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY ; INFN,I-20133 MILAN,ITALY ; NIELS BOHR INST,DK-2100 COPENHAGEN O,DENMARK ; CHARLES UNIV,MFF,NC,CS-18000 PRAGUE 8,CZECHOSLOVAKIA ; NIKEF H,1009 DB AMSTERDAM,NETHERLANDS ; NATL TECH UNIV ATHENS,DEPT PHYS,GR-15773 ATHENS,GREECE ; UNIV OSLO,DEPT PHYS,N-1000 OSLO 3,NORWAY ; UNIV OVIEDO,DEPT FIS,E-33006 OVIEDO,SPAIN ; UNIV OXFORD,DEPT PHYS,OXFORD OX1 3RH,ENGLAND ; UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY ; INFN,I-35131 PADUA,ITALY ; PONTIFICIA UNIV CATOLICA,DEPT FIS,BR-22453 RIO JANEIRO,BRAZIL ; RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND ; UNIV ROMA TOR VERGATA,DIPARTIMENTO FIS,I-00173 ROME,ITALY ; INFN,I-00173 ROME,ITALY ; CTR ETUD SACLAY,DSM,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE ; UNIV SALERNO,DIPARTIMENTO FIS,I-84100 SALERNO,ITALY ; IST SUPER SANITA,INFN,I-00161 ROME,ITALY ; UNIV CANTABRIA,CSIC,CEAFM,E-39006 SANTANDER,SPAIN ; PROTVINO HIGH ENERGY PHYS INST,PROTVINO,RUSSIA ; UNIV LJUBLJANA,J STEFAN INST,61000 LJUBLJANA,SLOVENIA ; UNIV LJUBLJANA,DEPT PHYS,61000 LJUBLJANA,SLOVENIA ; UNIV STOCKHOLM,INST PHYS,S-11346 STOCKHOLM,SWEDEN ; UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10125 TURIN,ITALY ; INFN,I-10125 TURIN,ITALY ; UNIV TRIESTE,DIPARTIMENTO FIS,I-34127 TRIESTE,ITALY ; INFN,I-34127 TRIESTE,ITALY ; UNIV UDINE,IST FIS,I-33100 UDINE,ITALY ; UNIV UPPSALA,DEPT RADIAT SCI,S-75121 UPPSALA,SWEDEN ; CSIC,IFIC,E-46100 BURJASSOT,SPAIN ; UNIV VALENCIA,DFAMN,E-46100 BURJASSOT,SPAIN ; AUSTRIAN ACAD SCI,INST HOCHENERGIEPHYS,A-1050 VIENNA,AUSTRIA ; INST NUCL STUDIES,PL-00681 WARSAW,POLAND ; UNIV WARSAW,PL-00681 WARSAW,POLAND ; UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,W-5600 WUPPERTAL 1,GERMANY |
| 英文摘要 | The strong coupling constant for b quarks has been determined, and its flavour independence, as predicted by QCD, investigated. The analysis involved events with lepton candidates selected from approximately 356 000 hadronic decays of the Z0, collected by the DELPHI detector at LEP in 1990 and 199 1. A method based on a direct comparison of the three-jet fraction in a b enriched sample, selected by requiring leptons with large momenta and transverse momenta, to that of the entire hadronic sample, illustrated the significant effect of the b quark mass on the multi-jet cross section, and verified the flavour independence of the strong coupling constant to an accuracy of +/- 6%. A second procedure based on a fit to the momentum and transverse momentum spectra of the lepton candidates in both two-jet and three (or more)-jet event samples simultaneously determined the b content in each, and, using second order QCD calculations, gave an absolute measurement of alpha(s) for b quarks of 0. 1 18 +/- 0.004 (stat.) +/- 0.003 (syst.) +/- 0.008 (scale). A comparison with a, for all quark flavours, as measured from the three-jet fraction in all hadronic events, further allowed the coupling strength for b quarks to be expressed in terms relative to that for udsc quarks, thereby cancelling certain common systematic uncertainties, and yielded alpha(s)b/alpha(s)udsc = 1.00 +/- 0.04 (stat.) +/- 0.03 (syst.). |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:A1993LH16600031 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/236855]  |
| 专题 | 高能物理研究所_实验物理中心 中国科学院高能物理研究所_中国散裂中子源 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | ABREU, P,ADAM, W,ADYE, T,et al. DETERMINATION OF ALPHA(S) FOR B-QUARKS AT THE Z(0) RESONANCE[J]. PHYSICS LETTERS B,1993,307(1-2):221-236. |
| APA | ABREU, P.,ADAM, W.,ADYE, T.,AGASI, E.,ALEKSAN, R.,...&ZUNIGA, J.(1993).DETERMINATION OF ALPHA(S) FOR B-QUARKS AT THE Z(0) RESONANCE.PHYSICS LETTERS B,307(1-2),221-236. |
| MLA | ABREU, P,et al."DETERMINATION OF ALPHA(S) FOR B-QUARKS AT THE Z(0) RESONANCE".PHYSICS LETTERS B 307.1-2(1993):221-236. |
入库方式： OAI收割
来源：高能物理研究所
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