Measurement of the strong coupling-constant alpha-s from global event-shape variables of hadronic z-decays
文献类型：期刊论文
| 作者 | DECAMP, D; DESCHIZEAUX, B; GOY, C; LEES, JP; MINARD, MN; ALEMANY, R; CRESPO, JM; DELFINO, M; FERNANDEZ, E; GAITAN, V |
| 刊名 | Physics letters b
 |
| 出版日期 | 1991-02-21 |
| 卷号 | 255期号:4页码:623-633 |
| ISSN号 | 0370-2693 |
| 通讯作者 | Decamp, d() |
| 英文摘要 | An analysis of global event-shape variables has been carried out for the reaction e+e- --> z0 --> hadrons to measure the strong coupling constant alpha-s. this study is based on 52 720 hadronic events obtained in 1989/90 with the aleph detector at the lep collider at energies near the peak of the z-resonance. in order to determine alpha-s, second order qcd predictions modified by effects of perturbative higher orders and hadronization were fitted to the experimental distributions of event-shape variables. from a detailed analysis of the theoretical uncertainties we find that this approach is best justified for the differential two-jet rate, from which we obtain alpha-s(m(z2) = 0.121 +/- 0.002(stat.) +/- 0.003(sys.) +/- 0.007(theor.) using a renormalization scale mu = 1/2m(z). the dependence of alpha-s(m(z2) on mu is parameterized. for scales m(b) < mu < m(z) the result varies by -0.012-+0.007. |
| WOS关键词 | E+E-ANNIHILATION ; PERTURBATIVE QCD ; MONTE-CARLO |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:A1991EZ87500027 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2176240 |
| 专题 | 高能物理研究所 |
| 通讯作者 | DECAMP, D |
| 作者单位 | 1.CNRS, IN2P3, LAB PHYS PARTICULES LAPP, F-74119 ANNECY LE VIEUX, FRANCE 2.UNIV AUTONOMA BARCELONA, LAB FIS ALTAS ENERGIAS, E-08193 BARCELONA, SPAIN 3.UNIV BARI, DIPARTIMENTO FIS, I-70126 BARI, ITALY 4.IST NAZL FIS NUCL, SEZ BARI, I-70126 BARI, ITALY 5.ACAD SINICA, INST HIGH ENERGY PHYS, BEIJING, PEOPLES R CHINA 6.CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND 7.UNIV BLAISE PASCAL, CNRS, IN2P3, LAB PHYS CORPUSCULAIRE, F-63177 AUBIERE, FRANCE 8.NIELS BOHR INST, DK-2100 COPENHAGEN, DENMARK 9.NUC RES CTR DEMOKRITOS, ATHENS, GREECE 10.ECOLE POLYTECH, CNRS, IN2P3, LAB PHYS NUCL & HAUTES ENERGIES, F-91128 PALAISEAU, FRANCE |
| 推荐引用方式 GB/T 7714 | DECAMP, D,DESCHIZEAUX, B,GOY, C,et al. Measurement of the strong coupling-constant alpha-s from global event-shape variables of hadronic z-decays[J]. Physics letters b,1991,255(4):623-633. |
| APA | DECAMP, D.,DESCHIZEAUX, B.,GOY, C.,LEES, JP.,MINARD, MN.,...&ZOBERNIG, G.(1991).Measurement of the strong coupling-constant alpha-s from global event-shape variables of hadronic z-decays.Physics letters b,255(4),623-633. |
| MLA | DECAMP, D,et al."Measurement of the strong coupling-constant alpha-s from global event-shape variables of hadronic z-decays".Physics letters b 255.4(1991):623-633. |
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