Measurement of W-pair production in e + e − collisions at centre-of-mass energies from 183 to 209 GeV
Measurement of W-pair production in e + e − collisions at centre-of-mass energies from 183 to 209 GeV
复制标题
测量质心能量为 183 至 209 GeV 的 e + e − 碰撞中 W 对的产生
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
M. Wunsch
中科院分区：
文献类型：
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作者：
S. Schael;I. Debonis;D. Decamp;E. Merle;B. Pietrzyk;B. Trocmé;S. Bravo;M. Casado;M. Chmeissani;J. M. Crespo;E. Fernandez;M. Fernandez;Ll. Garrido;M. Martinez;A. Pacheco;H. Ruiz;A. Colaleo;D. Creanza;N. DeFilippis;M. Depalma;G. Iaselli;G. Maggi;M. Maggi;S. Nuzzo;A. Ranieri;G. Raso;F. Ruggieri;G. Selvaggi;L. Silvestris;P. Tempesta;A. Tricomi;G. Zito;D. Abbaneo;T. Barklow;O. Buchmüller;M. Cattaneo;B. Clerbaux;H. Drevermann;R. Forty;M. Frank;F. Gianotti;J. Hansen;J. Harvey;D. Hutchcroft;P. Janot;B. Jost;M. Kado;P. Mato;A. Moutoussi;F. Ranjard;L. Rolandi;D. Schlatter;G. Sguazzoni;F. Teubert;A. Valassi;I. Videau;F. Badaud;S. Dessagne;A. Falvard;D. Fayolle;P. Gay;J. Jousset;B. Michel;S. Monteil;D. Pallin;J. M. Pascolo;P. Perret;A. Kraan;A. Vayaki;K. Zachariadou;A. Blondel;A. Rougé;P. Laurelli;G. Mannocchi;R. Cavanaugh;S. Dhamotharan;H. Stenzel;K. Tittel;M. Wunsch
. W + W −的产生截面是由ALEPH实验在LEP收集的总积分光度为683 pb − 1的数据样本测量的，质心能量为183至209 GeV。在八个质心能量下，给出了由W衰变为轻子或强子而产生的不同拓扑的单个截面以及总的W对截面。结果发现，在百分之一的水平与最近开发的标准模型计算一致。测得W玻色子的强子分支分数为B（W → q）= 67.13 ± 0.37（stat .）± 0.15（系统）%，其中CKM矩阵元素|V CS|测定为0.958 ± 0.017（stat .）± 0.008（系统).
. The W + W − production cross section is measured from a data sample corresponding to a total integrated luminosity of 683 pb − 1 , collected by the ALEPH experiment at LEP at centre-of-mass energies from 183 to 209 GeV. Individual cross sections for the different topologies arising from W decays into leptons or hadrons, as well as the total W-pair cross section are given at eight centre-of-mass energies. The results are found to be in agreement with recently developed Standard Model calculations at the one percent level. The hadronic branching fraction of the W boson is measured to be B(W → q¯q) = 67.13 ± 0.37 (stat . ) ± 0.15 (syst . )%, from which the CKM matrix element | V cs | is determined to be 0.958 ± 0.017 (stat . ) ± 0.008 (syst . ).