THE Z BOSON

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2016,（10）
• 页码范围: 603-609
• 页数: 7页
• 语种: 中文

摘要

Precision measurements at the Z-boson resonance using electron-positron colliding beams began in 1989 at the SLC and at LEP.During 1989-95,the four LEP experiments (ALEPH,DELPHI,L3,OPAL) made high-statistics studies of the production and decay properties of the Z.Although the SLD experiment at the SLC collected much lower statistics,it was able to match the precision of LEP experiments in determining the effective electroweak mixing angle sin2-θw and the rates of Z decay to b-and c-quarks,owing to availability of polarized electron beams,small beam size,and stable beam spot.