Anomalous Wtb Couplings and b → sγ in the Topcolour-Assisted Technicolour Models

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2001,（3）
• 所属期刊栏目: CENERAL
• 页码范围: 349-351
• 页数: 3页
• 分类号: 04
• 语种: 英文

摘要

Using topcolour-assisted technicolour models, we give the anomalous Wtb couplings arising from the exchange of the new gauge bosons (ETC gauge boson, colorons and Z′) and calculate their contributions to the b → sγbranching ratio. We find that the contributions mainly come from colorons and the recent measured value of the b → sγ branching ratio gives a strong constraint on the masses of colorons.